lib.rs

// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// Do not remove on snapshot creation. Needed for bootstrap. (Issue #22364)
#![cfg_attr(stage0, feature(custom_attribute))]
#![allow(non_upper_case_globals)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
#![allow(dead_code)]
#![allow(trivial_casts)]

#![crate_name = "rustc_llvm"]
#![unstable(feature = "rustc_private")]
#![staged_api]
#![crate_type = "dylib"]
#![crate_type = "rlib"]
#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
       html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
       html_root_url = "http://doc.rust-lang.org/nightly/")]

#![feature(associated_consts)]
#![feature(box_syntax)]
#![feature(libc)]
#![feature(link_args)]
#![feature(staged_api)]
#![feature(vec_push_all)]

extern crate libc;
#[macro_use] #[no_link] extern crate rustc_bitflags;

pub use self::OtherAttribute::*;
pub use self::SpecialAttribute::*;
pub use self::AttributeSet::*;
pub use self::IntPredicate::*;
pub use self::RealPredicate::*;
pub use self::TypeKind::*;
pub use self::AtomicBinOp::*;
pub use self::AtomicOrdering::*;
pub use self::SynchronizationScope::*;
pub use self::FileType::*;
pub use self::MetadataType::*;
pub use self::AsmDialect::*;
pub use self::CodeGenOptLevel::*;
pub use self::RelocMode::*;
pub use self::CodeGenModel::*;
pub use self::DiagnosticKind::*;
pub use self::CallConv::*;
pub use self::Visibility::*;
pub use self::DiagnosticSeverity::*;
pub use self::Linkage::*;
pub use self::DLLStorageClassTypes::*;

use std::ffi::CString;
use std::cell::RefCell;
use std::{slice, mem};
use libc::{c_uint, c_ushort, uint64_t, c_int, size_t, c_char};
use libc::{c_longlong, c_ulonglong, c_void};
use debuginfo::{DIBuilderRef, DIDescriptor,
                DIFile, DILexicalBlock, DISubprogram, DIType,
                DIBasicType, DIDerivedType, DICompositeType, DIScope,
                DIVariable, DIGlobalVariable, DIArray, DISubrange,
                DITemplateTypeParameter, DIEnumerator, DINameSpace};

pub mod archive_ro;
pub mod diagnostic;

pub type Opcode = u32;
pub type Bool = c_uint;

pub const True: Bool = 1 as Bool;
pub const False: Bool = 0 as Bool;

// Consts for the LLVM CallConv type, pre-cast to usize.

#[derive(Copy, Clone, PartialEq)]
pub enum CallConv {
    CCallConv = 0,
    FastCallConv = 8,
    ColdCallConv = 9,
    X86StdcallCallConv = 64,
    X86FastcallCallConv = 65,
    X86_64_Win64 = 79,
}

#[derive(Copy, Clone)]
pub enum Visibility {
    LLVMDefaultVisibility = 0,
    HiddenVisibility = 1,
    ProtectedVisibility = 2,
}

// This enum omits the obsolete (and no-op) linkage types DLLImportLinkage,
// DLLExportLinkage, GhostLinkage and LinkOnceODRAutoHideLinkage.
// LinkerPrivateLinkage and LinkerPrivateWeakLinkage are not included either;
// they've been removed in upstream LLVM commit r203866.
#[derive(Copy, Clone)]
pub enum Linkage {
    ExternalLinkage = 0,
    AvailableExternallyLinkage = 1,
    LinkOnceAnyLinkage = 2,
    LinkOnceODRLinkage = 3,
    WeakAnyLinkage = 5,
    WeakODRLinkage = 6,
    AppendingLinkage = 7,
    InternalLinkage = 8,
    PrivateLinkage = 9,
    ExternalWeakLinkage = 12,
    CommonLinkage = 14,
}

#[repr(C)]
#[derive(Copy, Clone, Debug)]
pub enum DiagnosticSeverity {
    Error,
    Warning,
    Remark,
    Note,
}


#[repr(C)]
#[derive(Copy, Clone)]
pub enum DLLStorageClassTypes {
    DefaultStorageClass = 0,
    DLLImportStorageClass = 1,
    DLLExportStorageClass = 2,
}

bitflags! {
    flags Attribute : u64 {
        const ZExt            = 1 << 0,
        const SExt            = 1 << 1,
        const NoReturn        = 1 << 2,
        const InReg           = 1 << 3,
        const StructRet       = 1 << 4,
        const NoUnwind        = 1 << 5,
        const NoAlias         = 1 << 6,
        const ByVal           = 1 << 7,
        const Nest            = 1 << 8,
        const ReadNone        = 1 << 9,
        const ReadOnly        = 1 << 10,
        const NoInline        = 1 << 11,
        const AlwaysInline    = 1 << 12,
        const OptimizeForSize = 1 << 13,
        const StackProtect    = 1 << 14,
        const StackProtectReq = 1 << 15,
        const Alignment       = 1 << 16,
        const NoCapture       = 1 << 21,
        const NoRedZone       = 1 << 22,
        const NoImplicitFloat = 1 << 23,
        const Naked           = 1 << 24,
        const InlineHint      = 1 << 25,
        const Stack           = 7 << 26,
        const ReturnsTwice    = 1 << 29,
        const UWTable         = 1 << 30,
        const NonLazyBind     = 1 << 31,
        const OptimizeNone    = 1 << 42,
    }
}


#[repr(u64)]
#[derive(Copy, Clone)]
pub enum OtherAttribute {
    // The following are not really exposed in
    // the LLVM C api so instead to add these
    // we call a wrapper function in RustWrapper
    // that uses the C++ api.
    SanitizeAddressAttribute = 1 << 32,
    MinSizeAttribute = 1 << 33,
    NoDuplicateAttribute = 1 << 34,
    StackProtectStrongAttribute = 1 << 35,
    SanitizeThreadAttribute = 1 << 36,
    SanitizeMemoryAttribute = 1 << 37,
    NoBuiltinAttribute = 1 << 38,
    ReturnedAttribute = 1 << 39,
    ColdAttribute = 1 << 40,
    BuiltinAttribute = 1 << 41,
    OptimizeNoneAttribute = 1 << 42,
    InAllocaAttribute = 1 << 43,
    NonNullAttribute = 1 << 44,
}

#[derive(Copy, Clone)]
pub enum SpecialAttribute {
    DereferenceableAttribute(u64)
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum AttributeSet {
    ReturnIndex = 0,
    FunctionIndex = !0
}

pub trait AttrHelper {
    fn apply_llfn(&self, idx: c_uint, llfn: ValueRef);
    fn apply_callsite(&self, idx: c_uint, callsite: ValueRef);
}

impl AttrHelper for Attribute {
    fn apply_llfn(&self, idx: c_uint, llfn: ValueRef) {
        unsafe {
            LLVMAddFunctionAttribute(llfn, idx, self.bits() as uint64_t);
        }
    }

    fn apply_callsite(&self, idx: c_uint, callsite: ValueRef) {
        unsafe {
            LLVMAddCallSiteAttribute(callsite, idx, self.bits() as uint64_t);
        }
    }
}

impl AttrHelper for OtherAttribute {
    fn apply_llfn(&self, idx: c_uint, llfn: ValueRef) {
        unsafe {
            LLVMAddFunctionAttribute(llfn, idx, *self as uint64_t);
        }
    }

    fn apply_callsite(&self, idx: c_uint, callsite: ValueRef) {
        unsafe {
            LLVMAddCallSiteAttribute(callsite, idx, *self as uint64_t);
        }
    }
}

impl AttrHelper for SpecialAttribute {
    fn apply_llfn(&self, idx: c_uint, llfn: ValueRef) {
        match *self {
            DereferenceableAttribute(bytes) => unsafe {
                LLVMAddDereferenceableAttr(llfn, idx, bytes as uint64_t);
            }
        }
    }

    fn apply_callsite(&self, idx: c_uint, callsite: ValueRef) {
        match *self {
            DereferenceableAttribute(bytes) => unsafe {
                LLVMAddDereferenceableCallSiteAttr(callsite, idx, bytes as uint64_t);
            }
        }
    }
}

pub struct AttrBuilder {
    attrs: Vec<(usize, Box<AttrHelper+'static>)>
}

impl AttrBuilder {
    pub fn new() -> AttrBuilder {
        AttrBuilder {
            attrs: Vec::new()
        }
    }

    pub fn arg<'a, T: AttrHelper + 'static>(&'a mut self, idx: usize, a: T) -> &'a mut AttrBuilder {
        self.attrs.push((idx, box a as Box<AttrHelper+'static>));
        self
    }

    pub fn ret<'a, T: AttrHelper + 'static>(&'a mut self, a: T) -> &'a mut AttrBuilder {
        self.attrs.push((ReturnIndex as usize, box a as Box<AttrHelper+'static>));
        self
    }

    pub fn apply_llfn(&self, llfn: ValueRef) {
        for &(idx, ref attr) in &self.attrs {
            attr.apply_llfn(idx as c_uint, llfn);
        }
    }

    pub fn apply_callsite(&self, callsite: ValueRef) {
        for &(idx, ref attr) in &self.attrs {
            attr.apply_callsite(idx as c_uint, callsite);
        }
    }
}

// enum for the LLVM IntPredicate type
#[derive(Copy, Clone)]
pub enum IntPredicate {
    IntEQ = 32,
    IntNE = 33,
    IntUGT = 34,
    IntUGE = 35,
    IntULT = 36,
    IntULE = 37,
    IntSGT = 38,
    IntSGE = 39,
    IntSLT = 40,
    IntSLE = 41,
}

// enum for the LLVM RealPredicate type
#[derive(Copy, Clone)]
pub enum RealPredicate {
    RealPredicateFalse = 0,
    RealOEQ = 1,
    RealOGT = 2,
    RealOGE = 3,
    RealOLT = 4,
    RealOLE = 5,
    RealONE = 6,
    RealORD = 7,
    RealUNO = 8,
    RealUEQ = 9,
    RealUGT = 10,
    RealUGE = 11,
    RealULT = 12,
    RealULE = 13,
    RealUNE = 14,
    RealPredicateTrue = 15,
}

// The LLVM TypeKind type - must stay in sync with the def of
// LLVMTypeKind in llvm/include/llvm-c/Core.h
#[derive(Copy, Clone, PartialEq, Debug)]
#[repr(C)]
pub enum TypeKind {
    Void      = 0,
    Half      = 1,
    Float     = 2,
    Double    = 3,
    X86_FP80  = 4,
    FP128     = 5,
    PPC_FP128 = 6,
    Label     = 7,
    Integer   = 8,
    Function  = 9,
    Struct    = 10,
    Array     = 11,
    Pointer   = 12,
    Vector    = 13,
    Metadata  = 14,
    X86_MMX   = 15,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum AtomicBinOp {
    AtomicXchg = 0,
    AtomicAdd  = 1,
    AtomicSub  = 2,
    AtomicAnd  = 3,
    AtomicNand = 4,
    AtomicOr   = 5,
    AtomicXor  = 6,
    AtomicMax  = 7,
    AtomicMin  = 8,
    AtomicUMax = 9,
    AtomicUMin = 10,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum AtomicOrdering {
    NotAtomic = 0,
    Unordered = 1,
    Monotonic = 2,
    // Consume = 3,  // Not specified yet.
    Acquire = 4,
    Release = 5,
    AcquireRelease = 6,
    SequentiallyConsistent = 7
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum SynchronizationScope {
    SingleThread = 0,
    CrossThread = 1
}

// Consts for the LLVMCodeGenFileType type (in include/llvm/c/TargetMachine.h)
#[repr(C)]
#[derive(Copy, Clone)]
pub enum FileType {
    AssemblyFileType = 0,
    ObjectFileType = 1
}

#[derive(Copy, Clone)]
pub enum MetadataType {
    MD_dbg = 0,
    MD_tbaa = 1,
    MD_prof = 2,
    MD_fpmath = 3,
    MD_range = 4,
    MD_tbaa_struct = 5,
    MD_invariant_load = 6,
    MD_alias_scope = 7,
    MD_noalias = 8,
    MD_nontemporal = 9,
    MD_mem_parallel_loop_access = 10,
    MD_nonnull = 11,
}

// Inline Asm Dialect
#[derive(Copy, Clone)]
pub enum AsmDialect {
    AD_ATT   = 0,
    AD_Intel = 1
}

#[derive(Copy, Clone, PartialEq)]
#[repr(C)]
pub enum CodeGenOptLevel {
    CodeGenLevelNone = 0,
    CodeGenLevelLess = 1,
    CodeGenLevelDefault = 2,
    CodeGenLevelAggressive = 3,
}

#[derive(Copy, Clone, PartialEq)]
#[repr(C)]
pub enum RelocMode {
    RelocDefault = 0,
    RelocStatic = 1,
    RelocPIC = 2,
    RelocDynamicNoPic = 3,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum CodeGenModel {
    CodeModelDefault = 0,
    CodeModelJITDefault = 1,
    CodeModelSmall = 2,
    CodeModelKernel = 3,
    CodeModelMedium = 4,
    CodeModelLarge = 5,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum DiagnosticKind {
    DK_InlineAsm = 0,
    DK_StackSize,
    DK_DebugMetadataVersion,
    DK_SampleProfile,
    DK_OptimizationRemark,
    DK_OptimizationRemarkMissed,
    DK_OptimizationRemarkAnalysis,
    DK_OptimizationFailure,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum ArchiveKind {
    K_GNU,
    K_MIPS64,
    K_BSD,
    K_COFF,
}

// Opaque pointer types
#[allow(missing_copy_implementations)]
pub enum Module_opaque {}
pub type ModuleRef = *mut Module_opaque;
#[allow(missing_copy_implementations)]
pub enum Context_opaque {}
pub type ContextRef = *mut Context_opaque;
#[allow(missing_copy_implementations)]
pub enum Type_opaque {}
pub type TypeRef = *mut Type_opaque;
#[allow(missing_copy_implementations)]
pub enum Value_opaque {}
pub type ValueRef = *mut Value_opaque;
#[allow(missing_copy_implementations)]
pub enum Metadata_opaque {}
pub type MetadataRef = *mut Metadata_opaque;
#[allow(missing_copy_implementations)]
pub enum BasicBlock_opaque {}
pub type BasicBlockRef = *mut BasicBlock_opaque;
#[allow(missing_copy_implementations)]
pub enum Builder_opaque {}
pub type BuilderRef = *mut Builder_opaque;
#[allow(missing_copy_implementations)]
pub enum ExecutionEngine_opaque {}
pub type ExecutionEngineRef = *mut ExecutionEngine_opaque;
#[allow(missing_copy_implementations)]
pub enum MemoryBuffer_opaque {}
pub type MemoryBufferRef = *mut MemoryBuffer_opaque;
#[allow(missing_copy_implementations)]
pub enum PassManager_opaque {}
pub type PassManagerRef = *mut PassManager_opaque;
#[allow(missing_copy_implementations)]
pub enum PassManagerBuilder_opaque {}
pub type PassManagerBuilderRef = *mut PassManagerBuilder_opaque;
#[allow(missing_copy_implementations)]
pub enum Use_opaque {}
pub type UseRef = *mut Use_opaque;
#[allow(missing_copy_implementations)]
pub enum TargetData_opaque {}
pub type TargetDataRef = *mut TargetData_opaque;
#[allow(missing_copy_implementations)]
pub enum ObjectFile_opaque {}
pub type ObjectFileRef = *mut ObjectFile_opaque;
#[allow(missing_copy_implementations)]
pub enum SectionIterator_opaque {}
pub type SectionIteratorRef = *mut SectionIterator_opaque;
#[allow(missing_copy_implementations)]
pub enum Pass_opaque {}
pub type PassRef = *mut Pass_opaque;
#[allow(missing_copy_implementations)]
pub enum TargetMachine_opaque {}
pub type TargetMachineRef = *mut TargetMachine_opaque;
pub enum Archive_opaque {}
pub type ArchiveRef = *mut Archive_opaque;
pub enum ArchiveIterator_opaque {}
pub type ArchiveIteratorRef = *mut ArchiveIterator_opaque;
pub enum ArchiveChild_opaque {}
pub type ArchiveChildRef = *mut ArchiveChild_opaque;
#[allow(missing_copy_implementations)]
pub enum Twine_opaque {}
pub type TwineRef = *mut Twine_opaque;
#[allow(missing_copy_implementations)]
pub enum DiagnosticInfo_opaque {}
pub type DiagnosticInfoRef = *mut DiagnosticInfo_opaque;
#[allow(missing_copy_implementations)]
pub enum DebugLoc_opaque {}
pub type DebugLocRef = *mut DebugLoc_opaque;
#[allow(missing_copy_implementations)]
pub enum SMDiagnostic_opaque {}
pub type SMDiagnosticRef = *mut SMDiagnostic_opaque;
#[allow(missing_copy_implementations)]
pub enum RustArchiveMember_opaque {}
pub type RustArchiveMemberRef = *mut RustArchiveMember_opaque;

pub type DiagnosticHandler = unsafe extern "C" fn(DiagnosticInfoRef, *mut c_void);
pub type InlineAsmDiagHandler = unsafe extern "C" fn(SMDiagnosticRef, *const c_void, c_uint);

pub mod debuginfo {
    pub use self::DIDescriptorFlags::*;
    use super::{MetadataRef};

    #[allow(missing_copy_implementations)]
    pub enum DIBuilder_opaque {}
    pub type DIBuilderRef = *mut DIBuilder_opaque;

    pub type DIDescriptor = MetadataRef;
    pub type DIScope = DIDescriptor;
    pub type DILocation = DIDescriptor;
    pub type DIFile = DIScope;
    pub type DILexicalBlock = DIScope;
    pub type DISubprogram = DIScope;
    pub type DINameSpace = DIScope;
    pub type DIType = DIDescriptor;
    pub type DIBasicType = DIType;
    pub type DIDerivedType = DIType;
    pub type DICompositeType = DIDerivedType;
    pub type DIVariable = DIDescriptor;
    pub type DIGlobalVariable = DIDescriptor;
    pub type DIArray = DIDescriptor;
    pub type DISubrange = DIDescriptor;
    pub type DIEnumerator = DIDescriptor;
    pub type DITemplateTypeParameter = DIDescriptor;

    #[derive(Copy, Clone)]
    pub enum DIDescriptorFlags {
      FlagPrivate            = 1 << 0,
      FlagProtected          = 1 << 1,
      FlagFwdDecl            = 1 << 2,
      FlagAppleBlock         = 1 << 3,
      FlagBlockByrefStruct   = 1 << 4,
      FlagVirtual            = 1 << 5,
      FlagArtificial         = 1 << 6,
      FlagExplicit           = 1 << 7,
      FlagPrototyped         = 1 << 8,
      FlagObjcClassComplete  = 1 << 9,
      FlagObjectPointer      = 1 << 10,
      FlagVector             = 1 << 11,
      FlagStaticMember       = 1 << 12,
      FlagIndirectVariable   = 1 << 13,
      FlagLValueReference    = 1 << 14,
      FlagRValueReference    = 1 << 15
    }
}


// Link to our native llvm bindings (things that we need to use the C++ api
// for) and because llvm is written in C++ we need to link against libstdc++
//
// You'll probably notice that there is an omission of all LLVM libraries
// from this location. This is because the set of LLVM libraries that we
// link to is mostly defined by LLVM, and the `llvm-config` tool is used to
// figure out the exact set of libraries. To do this, the build system
// generates an llvmdeps.rs file next to this one which will be
// automatically updated whenever LLVM is updated to include an up-to-date
// set of the libraries we need to link to LLVM for.
#[link(name = "rustllvm", kind = "static")]
extern {
    /* Create and destroy contexts. */
    pub fn LLVMContextCreate() -> ContextRef;
    pub fn LLVMContextDispose(C: ContextRef);
    pub fn LLVMGetMDKindIDInContext(C: ContextRef,
                                    Name: *const c_char,
                                    SLen: c_uint)
                                    -> c_uint;

    /* Create and destroy modules. */
    pub fn LLVMModuleCreateWithNameInContext(ModuleID: *const c_char,
                                             C: ContextRef)
                                             -> ModuleRef;
    pub fn LLVMGetModuleContext(M: ModuleRef) -> ContextRef;
    pub fn LLVMDisposeModule(M: ModuleRef);

    /// Data layout. See Module::getDataLayout.
    pub fn LLVMGetDataLayout(M: ModuleRef) -> *const c_char;
    pub fn LLVMSetDataLayout(M: ModuleRef, Triple: *const c_char);

    /// Target triple. See Module::getTargetTriple.
    pub fn LLVMGetTarget(M: ModuleRef) -> *const c_char;
    pub fn LLVMSetTarget(M: ModuleRef, Triple: *const c_char);

    /// See Module::dump.
    pub fn LLVMDumpModule(M: ModuleRef);

    /// See Module::setModuleInlineAsm.
    pub fn LLVMSetModuleInlineAsm(M: ModuleRef, Asm: *const c_char);

    /// See llvm::LLVMTypeKind::getTypeID.
    pub fn LLVMGetTypeKind(Ty: TypeRef) -> TypeKind;

    /// See llvm::LLVMType::getContext.
    pub fn LLVMGetTypeContext(Ty: TypeRef) -> ContextRef;

    /* Operations on integer types */
    pub fn LLVMInt1TypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMInt8TypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMInt16TypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMInt32TypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMInt64TypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMIntTypeInContext(C: ContextRef, NumBits: c_uint)
                                -> TypeRef;

    pub fn LLVMGetIntTypeWidth(IntegerTy: TypeRef) -> c_uint;

    /* Operations on real types */
    pub fn LLVMFloatTypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMDoubleTypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMX86FP80TypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMFP128TypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMPPCFP128TypeInContext(C: ContextRef) -> TypeRef;

    /* Operations on function types */
    pub fn LLVMFunctionType(ReturnType: TypeRef,
                            ParamTypes: *const TypeRef,
                            ParamCount: c_uint,
                            IsVarArg: Bool)
                            -> TypeRef;
    pub fn LLVMIsFunctionVarArg(FunctionTy: TypeRef) -> Bool;
    pub fn LLVMGetReturnType(FunctionTy: TypeRef) -> TypeRef;
    pub fn LLVMCountParamTypes(FunctionTy: TypeRef) -> c_uint;
    pub fn LLVMGetParamTypes(FunctionTy: TypeRef, Dest: *mut TypeRef);

    /* Operations on struct types */
    pub fn LLVMStructTypeInContext(C: ContextRef,
                                   ElementTypes: *const TypeRef,
                                   ElementCount: c_uint,
                                   Packed: Bool)
                                   -> TypeRef;
    pub fn LLVMCountStructElementTypes(StructTy: TypeRef) -> c_uint;
    pub fn LLVMGetStructElementTypes(StructTy: TypeRef,
                                     Dest: *mut TypeRef);
    pub fn LLVMIsPackedStruct(StructTy: TypeRef) -> Bool;

    /* Operations on array, pointer, and vector types (sequence types) */
    pub fn LLVMRustArrayType(ElementType: TypeRef, ElementCount: u64) -> TypeRef;
    pub fn LLVMPointerType(ElementType: TypeRef, AddressSpace: c_uint)
                           -> TypeRef;
    pub fn LLVMVectorType(ElementType: TypeRef, ElementCount: c_uint)
                          -> TypeRef;

    pub fn LLVMGetElementType(Ty: TypeRef) -> TypeRef;
    pub fn LLVMGetArrayLength(ArrayTy: TypeRef) -> c_uint;
    pub fn LLVMGetPointerAddressSpace(PointerTy: TypeRef) -> c_uint;
    pub fn LLVMGetPointerToGlobal(EE: ExecutionEngineRef, V: ValueRef)
                                  -> *const ();
    pub fn LLVMGetVectorSize(VectorTy: TypeRef) -> c_uint;

    /* Operations on other types */
    pub fn LLVMVoidTypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMLabelTypeInContext(C: ContextRef) -> TypeRef;
    pub fn LLVMMetadataTypeInContext(C: ContextRef) -> TypeRef;

    /* Operations on all values */
    pub fn LLVMTypeOf(Val: ValueRef) -> TypeRef;
    pub fn LLVMGetValueName(Val: ValueRef) -> *const c_char;
    pub fn LLVMSetValueName(Val: ValueRef, Name: *const c_char);
    pub fn LLVMDumpValue(Val: ValueRef);
    pub fn LLVMReplaceAllUsesWith(OldVal: ValueRef, NewVal: ValueRef);
    pub fn LLVMHasMetadata(Val: ValueRef) -> c_int;
    pub fn LLVMGetMetadata(Val: ValueRef, KindID: c_uint) -> ValueRef;
    pub fn LLVMSetMetadata(Val: ValueRef, KindID: c_uint, Node: ValueRef);

    /* Operations on Uses */
    pub fn LLVMGetFirstUse(Val: ValueRef) -> UseRef;
    pub fn LLVMGetNextUse(U: UseRef) -> UseRef;
    pub fn LLVMGetUser(U: UseRef) -> ValueRef;
    pub fn LLVMGetUsedValue(U: UseRef) -> ValueRef;

    /* Operations on Users */
    pub fn LLVMGetNumOperands(Val: ValueRef) -> c_int;
    pub fn LLVMGetOperand(Val: ValueRef, Index: c_uint) -> ValueRef;
    pub fn LLVMSetOperand(Val: ValueRef, Index: c_uint, Op: ValueRef);

    /* Operations on constants of any type */
    pub fn LLVMConstNull(Ty: TypeRef) -> ValueRef;
    /* all zeroes */
    pub fn LLVMConstAllOnes(Ty: TypeRef) -> ValueRef;
    pub fn LLVMConstICmp(Pred: c_ushort, V1: ValueRef, V2: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstFCmp(Pred: c_ushort, V1: ValueRef, V2: ValueRef)
                         -> ValueRef;
    /* only for isize/vector */
    pub fn LLVMGetUndef(Ty: TypeRef) -> ValueRef;
    pub fn LLVMIsConstant(Val: ValueRef) -> Bool;
    pub fn LLVMIsNull(Val: ValueRef) -> Bool;
    pub fn LLVMIsUndef(Val: ValueRef) -> Bool;
    pub fn LLVMConstPointerNull(Ty: TypeRef) -> ValueRef;

    /* Operations on metadata */
    pub fn LLVMMDStringInContext(C: ContextRef,
                                 Str: *const c_char,
                                 SLen: c_uint)
                                 -> ValueRef;
    pub fn LLVMMDNodeInContext(C: ContextRef,
                               Vals: *const ValueRef,
                               Count: c_uint)
                               -> ValueRef;
    pub fn LLVMAddNamedMetadataOperand(M: ModuleRef,
                                       Str: *const c_char,
                                       Val: ValueRef);

    /* Operations on scalar constants */
    pub fn LLVMConstInt(IntTy: TypeRef, N: c_ulonglong, SignExtend: Bool)
                        -> ValueRef;
    pub fn LLVMConstIntOfString(IntTy: TypeRef, Text: *const c_char, Radix: u8)
                                -> ValueRef;
    pub fn LLVMConstIntOfStringAndSize(IntTy: TypeRef,
                                       Text: *const c_char,
                                       SLen: c_uint,
                                       Radix: u8)
                                       -> ValueRef;
    pub fn LLVMConstReal(RealTy: TypeRef, N: f64) -> ValueRef;
    pub fn LLVMConstRealOfString(RealTy: TypeRef, Text: *const c_char)
                                 -> ValueRef;
    pub fn LLVMConstRealOfStringAndSize(RealTy: TypeRef,
                                        Text: *const c_char,
                                        SLen: c_uint)
                                        -> ValueRef;
    pub fn LLVMConstIntGetZExtValue(ConstantVal: ValueRef) -> c_ulonglong;
    pub fn LLVMConstIntGetSExtValue(ConstantVal: ValueRef) -> c_longlong;


    /* Operations on composite constants */
    pub fn LLVMConstStringInContext(C: ContextRef,
                                    Str: *const c_char,
                                    Length: c_uint,
                                    DontNullTerminate: Bool)
                                    -> ValueRef;
    pub fn LLVMConstStructInContext(C: ContextRef,
                                    ConstantVals: *const ValueRef,
                                    Count: c_uint,
                                    Packed: Bool)
                                    -> ValueRef;

    pub fn LLVMConstArray(ElementTy: TypeRef,
                          ConstantVals: *const ValueRef,
                          Length: c_uint)
                          -> ValueRef;
    pub fn LLVMConstVector(ScalarConstantVals: *const ValueRef, Size: c_uint)
                           -> ValueRef;

    /* Constant expressions */
    pub fn LLVMAlignOf(Ty: TypeRef) -> ValueRef;
    pub fn LLVMSizeOf(Ty: TypeRef) -> ValueRef;
    pub fn LLVMConstNeg(ConstantVal: ValueRef) -> ValueRef;
    pub fn LLVMConstNSWNeg(ConstantVal: ValueRef) -> ValueRef;
    pub fn LLVMConstNUWNeg(ConstantVal: ValueRef) -> ValueRef;
    pub fn LLVMConstFNeg(ConstantVal: ValueRef) -> ValueRef;
    pub fn LLVMConstNot(ConstantVal: ValueRef) -> ValueRef;
    pub fn LLVMConstAdd(LHSConstant: ValueRef, RHSConstant: ValueRef)
                        -> ValueRef;
    pub fn LLVMConstNSWAdd(LHSConstant: ValueRef, RHSConstant: ValueRef)
                           -> ValueRef;
    pub fn LLVMConstNUWAdd(LHSConstant: ValueRef, RHSConstant: ValueRef)
                           -> ValueRef;
    pub fn LLVMConstFAdd(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstSub(LHSConstant: ValueRef, RHSConstant: ValueRef)
                        -> ValueRef;
    pub fn LLVMConstNSWSub(LHSConstant: ValueRef, RHSConstant: ValueRef)
                           -> ValueRef;
    pub fn LLVMConstNUWSub(LHSConstant: ValueRef, RHSConstant: ValueRef)
                           -> ValueRef;
    pub fn LLVMConstFSub(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstMul(LHSConstant: ValueRef, RHSConstant: ValueRef)
                        -> ValueRef;
    pub fn LLVMConstNSWMul(LHSConstant: ValueRef, RHSConstant: ValueRef)
                           -> ValueRef;
    pub fn LLVMConstNUWMul(LHSConstant: ValueRef, RHSConstant: ValueRef)
                           -> ValueRef;
    pub fn LLVMConstFMul(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstUDiv(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstSDiv(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstExactSDiv(LHSConstant: ValueRef,
                              RHSConstant: ValueRef)
                              -> ValueRef;
    pub fn LLVMConstFDiv(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstURem(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstSRem(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstFRem(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstAnd(LHSConstant: ValueRef, RHSConstant: ValueRef)
                        -> ValueRef;
    pub fn LLVMConstOr(LHSConstant: ValueRef, RHSConstant: ValueRef)
                       -> ValueRef;
    pub fn LLVMConstXor(LHSConstant: ValueRef, RHSConstant: ValueRef)
                        -> ValueRef;
    pub fn LLVMConstShl(LHSConstant: ValueRef, RHSConstant: ValueRef)
                        -> ValueRef;
    pub fn LLVMConstLShr(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstAShr(LHSConstant: ValueRef, RHSConstant: ValueRef)
                         -> ValueRef;
    pub fn LLVMConstGEP(ConstantVal: ValueRef,
                        ConstantIndices: *const ValueRef,
                        NumIndices: c_uint)
                        -> ValueRef;
    pub fn LLVMConstInBoundsGEP(ConstantVal: ValueRef,
                                ConstantIndices: *const ValueRef,
                                NumIndices: c_uint)
                                -> ValueRef;
    pub fn LLVMConstTrunc(ConstantVal: ValueRef, ToType: TypeRef)
                          -> ValueRef;
    pub fn LLVMConstSExt(ConstantVal: ValueRef, ToType: TypeRef)
                         -> ValueRef;
    pub fn LLVMConstZExt(ConstantVal: ValueRef, ToType: TypeRef)
                         -> ValueRef;
    pub fn LLVMConstFPTrunc(ConstantVal: ValueRef, ToType: TypeRef)
                            -> ValueRef;
    pub fn LLVMConstFPExt(ConstantVal: ValueRef, ToType: TypeRef)
                          -> ValueRef;
    pub fn LLVMConstUIToFP(ConstantVal: ValueRef, ToType: TypeRef)
                           -> ValueRef;
    pub fn LLVMConstSIToFP(ConstantVal: ValueRef, ToType: TypeRef)
                           -> ValueRef;
    pub fn LLVMConstFPToUI(ConstantVal: ValueRef, ToType: TypeRef)
                           -> ValueRef;
    pub fn LLVMConstFPToSI(ConstantVal: ValueRef, ToType: TypeRef)
                           -> ValueRef;
    pub fn LLVMConstPtrToInt(ConstantVal: ValueRef, ToType: TypeRef)
                             -> ValueRef;
    pub fn LLVMConstIntToPtr(ConstantVal: ValueRef, ToType: TypeRef)
                             -> ValueRef;
    pub fn LLVMConstBitCast(ConstantVal: ValueRef, ToType: TypeRef)
                            -> ValueRef;
    pub fn LLVMConstZExtOrBitCast(ConstantVal: ValueRef, ToType: TypeRef)
                                  -> ValueRef;
    pub fn LLVMConstSExtOrBitCast(ConstantVal: ValueRef, ToType: TypeRef)
                                  -> ValueRef;
    pub fn LLVMConstTruncOrBitCast(ConstantVal: ValueRef, ToType: TypeRef)
                                   -> ValueRef;
    pub fn LLVMConstPointerCast(ConstantVal: ValueRef, ToType: TypeRef)
                                -> ValueRef;
    pub fn LLVMConstIntCast(ConstantVal: ValueRef,
                            ToType: TypeRef,
                            isSigned: Bool)
                            -> ValueRef;
    pub fn LLVMConstFPCast(ConstantVal: ValueRef, ToType: TypeRef)
                           -> ValueRef;
    pub fn LLVMConstSelect(ConstantCondition: ValueRef,
                           ConstantIfTrue: ValueRef,
                           ConstantIfFalse: ValueRef)
                           -> ValueRef;
    pub fn LLVMConstExtractElement(VectorConstant: ValueRef,
                                   IndexConstant: ValueRef)
                                   -> ValueRef;
    pub fn LLVMConstInsertElement(VectorConstant: ValueRef,
                                  ElementValueConstant: ValueRef,
                                  IndexConstant: ValueRef)
                                  -> ValueRef;
    pub fn LLVMConstShuffleVector(VectorAConstant: ValueRef,
                                  VectorBConstant: ValueRef,
                                  MaskConstant: ValueRef)
                                  -> ValueRef;
    pub fn LLVMConstExtractValue(AggConstant: ValueRef,
                                 IdxList: *const c_uint,
                                 NumIdx: c_uint)
                                 -> ValueRef;
    pub fn LLVMConstInsertValue(AggConstant: ValueRef,
                                ElementValueConstant: ValueRef,
                                IdxList: *const c_uint,
                                NumIdx: c_uint)
                                -> ValueRef;
    pub fn LLVMConstInlineAsm(Ty: TypeRef,
                              AsmString: *const c_char,
                              Constraints: *const c_char,
                              HasSideEffects: Bool,
                              IsAlignStack: Bool)
                              -> ValueRef;
    pub fn LLVMBlockAddress(F: ValueRef, BB: BasicBlockRef) -> ValueRef;



    /* Operations on global variables, functions, and aliases (globals) */
    pub fn LLVMGetGlobalParent(Global: ValueRef) -> ModuleRef;
    pub fn LLVMIsDeclaration(Global: ValueRef) -> Bool;
    pub fn LLVMGetLinkage(Global: ValueRef) -> c_uint;
    pub fn LLVMSetLinkage(Global: ValueRef, Link: c_uint);
    pub fn LLVMGetSection(Global: ValueRef) -> *const c_char;
    pub fn LLVMSetSection(Global: ValueRef, Section: *const c_char);
    pub fn LLVMGetVisibility(Global: ValueRef) -> c_uint;
    pub fn LLVMSetVisibility(Global: ValueRef, Viz: c_uint);
    pub fn LLVMGetAlignment(Global: ValueRef) -> c_uint;
    pub fn LLVMSetAlignment(Global: ValueRef, Bytes: c_uint);


    /* Operations on global variables */
    pub fn LLVMIsAGlobalVariable(GlobalVar: ValueRef) -> ValueRef;
    pub fn LLVMAddGlobal(M: ModuleRef, Ty: TypeRef, Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMAddGlobalInAddressSpace(M: ModuleRef,
                                       Ty: TypeRef,
                                       Name: *const c_char,
                                       AddressSpace: c_uint)
                                       -> ValueRef;
    pub fn LLVMGetNamedGlobal(M: ModuleRef, Name: *const c_char) -> ValueRef;
    pub fn LLVMGetOrInsertGlobal(M: ModuleRef, Name: *const c_char, T: TypeRef) -> ValueRef;
    pub fn LLVMGetFirstGlobal(M: ModuleRef) -> ValueRef;
    pub fn LLVMGetLastGlobal(M: ModuleRef) -> ValueRef;
    pub fn LLVMGetNextGlobal(GlobalVar: ValueRef) -> ValueRef;
    pub fn LLVMGetPreviousGlobal(GlobalVar: ValueRef) -> ValueRef;
    pub fn LLVMDeleteGlobal(GlobalVar: ValueRef);
    pub fn LLVMGetInitializer(GlobalVar: ValueRef) -> ValueRef;
    pub fn LLVMSetInitializer(GlobalVar: ValueRef,
                              ConstantVal: ValueRef);
    pub fn LLVMIsThreadLocal(GlobalVar: ValueRef) -> Bool;
    pub fn LLVMSetThreadLocal(GlobalVar: ValueRef, IsThreadLocal: Bool);
    pub fn LLVMIsGlobalConstant(GlobalVar: ValueRef) -> Bool;
    pub fn LLVMSetGlobalConstant(GlobalVar: ValueRef, IsConstant: Bool);
    pub fn LLVMGetNamedValue(M: ModuleRef, Name: *const c_char) -> ValueRef;

    /* Operations on aliases */
    pub fn LLVMAddAlias(M: ModuleRef,
                        Ty: TypeRef,
                        Aliasee: ValueRef,
                        Name: *const c_char)
                        -> ValueRef;

    /* Operations on functions */
    pub fn LLVMAddFunction(M: ModuleRef,
                           Name: *const c_char,
                           FunctionTy: TypeRef)
                           -> ValueRef;
    pub fn LLVMGetNamedFunction(M: ModuleRef, Name: *const c_char) -> ValueRef;
    pub fn LLVMGetFirstFunction(M: ModuleRef) -> ValueRef;
    pub fn LLVMGetLastFunction(M: ModuleRef) -> ValueRef;
    pub fn LLVMGetNextFunction(Fn: ValueRef) -> ValueRef;
    pub fn LLVMGetPreviousFunction(Fn: ValueRef) -> ValueRef;
    pub fn LLVMDeleteFunction(Fn: ValueRef);
    pub fn LLVMGetOrInsertFunction(M: ModuleRef,
                                   Name: *const c_char,
                                   FunctionTy: TypeRef)
                                   -> ValueRef;
    pub fn LLVMGetIntrinsicID(Fn: ValueRef) -> c_uint;
    pub fn LLVMGetFunctionCallConv(Fn: ValueRef) -> c_uint;
    pub fn LLVMSetFunctionCallConv(Fn: ValueRef, CC: c_uint);
    pub fn LLVMGetGC(Fn: ValueRef) -> *const c_char;
    pub fn LLVMSetGC(Fn: ValueRef, Name: *const c_char);
    pub fn LLVMAddDereferenceableAttr(Fn: ValueRef, index: c_uint, bytes: uint64_t);
    pub fn LLVMAddFunctionAttribute(Fn: ValueRef, index: c_uint, PA: uint64_t);
    pub fn LLVMAddFunctionAttrString(Fn: ValueRef, index: c_uint, Name: *const c_char);
    pub fn LLVMAddFunctionAttrStringValue(Fn: ValueRef, index: c_uint,
                                          Name: *const c_char,
                                          Value: *const c_char);
    pub fn LLVMRemoveFunctionAttrString(Fn: ValueRef, index: c_uint, Name: *const c_char);
    pub fn LLVMGetFunctionAttr(Fn: ValueRef) -> c_ulonglong;
    pub fn LLVMRemoveFunctionAttr(Fn: ValueRef, val: c_ulonglong);

    /* Operations on parameters */
    pub fn LLVMCountParams(Fn: ValueRef) -> c_uint;
    pub fn LLVMGetParams(Fn: ValueRef, Params: *const ValueRef);
    pub fn LLVMGetParam(Fn: ValueRef, Index: c_uint) -> ValueRef;
    pub fn LLVMGetParamParent(Inst: ValueRef) -> ValueRef;
    pub fn LLVMGetFirstParam(Fn: ValueRef) -> ValueRef;
    pub fn LLVMGetLastParam(Fn: ValueRef) -> ValueRef;
    pub fn LLVMGetNextParam(Arg: ValueRef) -> ValueRef;
    pub fn LLVMGetPreviousParam(Arg: ValueRef) -> ValueRef;
    pub fn LLVMAddAttribute(Arg: ValueRef, PA: c_uint);
    pub fn LLVMRemoveAttribute(Arg: ValueRef, PA: c_uint);
    pub fn LLVMGetAttribute(Arg: ValueRef) -> c_uint;
    pub fn LLVMSetParamAlignment(Arg: ValueRef, align: c_uint);

    /* Operations on basic blocks */
    pub fn LLVMBasicBlockAsValue(BB: BasicBlockRef) -> ValueRef;
    pub fn LLVMValueIsBasicBlock(Val: ValueRef) -> Bool;
    pub fn LLVMValueAsBasicBlock(Val: ValueRef) -> BasicBlockRef;
    pub fn LLVMGetBasicBlockParent(BB: BasicBlockRef) -> ValueRef;
    pub fn LLVMCountBasicBlocks(Fn: ValueRef) -> c_uint;
    pub fn LLVMGetBasicBlocks(Fn: ValueRef, BasicBlocks: *const ValueRef);
    pub fn LLVMGetFirstBasicBlock(Fn: ValueRef) -> BasicBlockRef;
    pub fn LLVMGetLastBasicBlock(Fn: ValueRef) -> BasicBlockRef;
    pub fn LLVMGetNextBasicBlock(BB: BasicBlockRef) -> BasicBlockRef;
    pub fn LLVMGetPreviousBasicBlock(BB: BasicBlockRef) -> BasicBlockRef;
    pub fn LLVMGetEntryBasicBlock(Fn: ValueRef) -> BasicBlockRef;

    pub fn LLVMAppendBasicBlockInContext(C: ContextRef,
                                         Fn: ValueRef,
                                         Name: *const c_char)
                                         -> BasicBlockRef;
    pub fn LLVMInsertBasicBlockInContext(C: ContextRef,
                                         BB: BasicBlockRef,
                                         Name: *const c_char)
                                         -> BasicBlockRef;
    pub fn LLVMDeleteBasicBlock(BB: BasicBlockRef);

    pub fn LLVMMoveBasicBlockAfter(BB: BasicBlockRef,
                                   MoveAfter: BasicBlockRef);

    pub fn LLVMMoveBasicBlockBefore(BB: BasicBlockRef,
                                    MoveBefore: BasicBlockRef);

    /* Operations on instructions */
    pub fn LLVMGetInstructionParent(Inst: ValueRef) -> BasicBlockRef;
    pub fn LLVMGetFirstInstruction(BB: BasicBlockRef) -> ValueRef;
    pub fn LLVMGetLastInstruction(BB: BasicBlockRef) -> ValueRef;
    pub fn LLVMGetNextInstruction(Inst: ValueRef) -> ValueRef;
    pub fn LLVMGetPreviousInstruction(Inst: ValueRef) -> ValueRef;
    pub fn LLVMInstructionEraseFromParent(Inst: ValueRef);

    /* Operations on call sites */
    pub fn LLVMSetInstructionCallConv(Instr: ValueRef, CC: c_uint);
    pub fn LLVMGetInstructionCallConv(Instr: ValueRef) -> c_uint;
    pub fn LLVMAddInstrAttribute(Instr: ValueRef,
                                 index: c_uint,
                                 IA: c_uint);
    pub fn LLVMRemoveInstrAttribute(Instr: ValueRef,
                                    index: c_uint,
                                    IA: c_uint);
    pub fn LLVMSetInstrParamAlignment(Instr: ValueRef,
                                      index: c_uint,
                                      align: c_uint);
    pub fn LLVMAddCallSiteAttribute(Instr: ValueRef,
                                    index: c_uint,
                                    Val: uint64_t);
    pub fn LLVMAddDereferenceableCallSiteAttr(Instr: ValueRef,
                                              index: c_uint,
                                              bytes: uint64_t);

    /* Operations on call instructions (only) */
    pub fn LLVMIsTailCall(CallInst: ValueRef) -> Bool;
    pub fn LLVMSetTailCall(CallInst: ValueRef, IsTailCall: Bool);

    /* Operations on load/store instructions (only) */
    pub fn LLVMGetVolatile(MemoryAccessInst: ValueRef) -> Bool;
    pub fn LLVMSetVolatile(MemoryAccessInst: ValueRef, volatile: Bool);

    /* Operations on phi nodes */
    pub fn LLVMAddIncoming(PhiNode: ValueRef,
                           IncomingValues: *const ValueRef,
                           IncomingBlocks: *const BasicBlockRef,
                           Count: c_uint);
    pub fn LLVMCountIncoming(PhiNode: ValueRef) -> c_uint;
    pub fn LLVMGetIncomingValue(PhiNode: ValueRef, Index: c_uint)
                                -> ValueRef;
    pub fn LLVMGetIncomingBlock(PhiNode: ValueRef, Index: c_uint)
                                -> BasicBlockRef;

    /* Instruction builders */
    pub fn LLVMCreateBuilderInContext(C: ContextRef) -> BuilderRef;
    pub fn LLVMPositionBuilder(Builder: BuilderRef,
                               Block: BasicBlockRef,
                               Instr: ValueRef);
    pub fn LLVMPositionBuilderBefore(Builder: BuilderRef,
                                     Instr: ValueRef);
    pub fn LLVMPositionBuilderAtEnd(Builder: BuilderRef,
                                    Block: BasicBlockRef);
    pub fn LLVMGetInsertBlock(Builder: BuilderRef) -> BasicBlockRef;
    pub fn LLVMClearInsertionPosition(Builder: BuilderRef);
    pub fn LLVMInsertIntoBuilder(Builder: BuilderRef, Instr: ValueRef);
    pub fn LLVMInsertIntoBuilderWithName(Builder: BuilderRef,
                                         Instr: ValueRef,
                                         Name: *const c_char);
    pub fn LLVMDisposeBuilder(Builder: BuilderRef);

    /* Execution engine */
    pub fn LLVMBuildExecutionEngine(Mod: ModuleRef) -> ExecutionEngineRef;
    pub fn LLVMDisposeExecutionEngine(EE: ExecutionEngineRef);
    pub fn LLVMExecutionEngineFinalizeObject(EE: ExecutionEngineRef);
    pub fn LLVMRustLoadDynamicLibrary(path: *const c_char) -> Bool;
    pub fn LLVMExecutionEngineAddModule(EE: ExecutionEngineRef, M: ModuleRef);
    pub fn LLVMExecutionEngineRemoveModule(EE: ExecutionEngineRef, M: ModuleRef)
                                           -> Bool;

    /* Metadata */
    pub fn LLVMSetCurrentDebugLocation(Builder: BuilderRef, L: ValueRef);
    pub fn LLVMGetCurrentDebugLocation(Builder: BuilderRef) -> ValueRef;
    pub fn LLVMSetInstDebugLocation(Builder: BuilderRef, Inst: ValueRef);

    /* Terminators */
    pub fn LLVMBuildRetVoid(B: BuilderRef) -> ValueRef;
    pub fn LLVMBuildRet(B: BuilderRef, V: ValueRef) -> ValueRef;
    pub fn LLVMBuildAggregateRet(B: BuilderRef,
                                 RetVals: *const ValueRef,
                                 N: c_uint)
                                 -> ValueRef;
    pub fn LLVMBuildBr(B: BuilderRef, Dest: BasicBlockRef) -> ValueRef;
    pub fn LLVMBuildCondBr(B: BuilderRef,
                           If: ValueRef,
                           Then: BasicBlockRef,
                           Else: BasicBlockRef)
                           -> ValueRef;
    pub fn LLVMBuildSwitch(B: BuilderRef,
                           V: ValueRef,
                           Else: BasicBlockRef,
                           NumCases: c_uint)
                           -> ValueRef;
    pub fn LLVMBuildIndirectBr(B: BuilderRef,
                               Addr: ValueRef,
                               NumDests: c_uint)
                               -> ValueRef;
    pub fn LLVMBuildInvoke(B: BuilderRef,
                           Fn: ValueRef,
                           Args: *const ValueRef,
                           NumArgs: c_uint,
                           Then: BasicBlockRef,
                           Catch: BasicBlockRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMRustBuildLandingPad(B: BuilderRef,
                                   Ty: TypeRef,
                                   PersFn: ValueRef,
                                   NumClauses: c_uint,
                                   Name: *const c_char,
                                   F: ValueRef)
                                   -> ValueRef;
    pub fn LLVMBuildResume(B: BuilderRef, Exn: ValueRef) -> ValueRef;
    pub fn LLVMBuildUnreachable(B: BuilderRef) -> ValueRef;

    /* Add a case to the switch instruction */
    pub fn LLVMAddCase(Switch: ValueRef,
                       OnVal: ValueRef,
                       Dest: BasicBlockRef);

    /* Add a destination to the indirectbr instruction */
    pub fn LLVMAddDestination(IndirectBr: ValueRef, Dest: BasicBlockRef);

    /* Add a clause to the landing pad instruction */
    pub fn LLVMAddClause(LandingPad: ValueRef, ClauseVal: ValueRef);

    /* Set the cleanup on a landing pad instruction */
    pub fn LLVMSetCleanup(LandingPad: ValueRef, Val: Bool);

    /* Arithmetic */
    pub fn LLVMBuildAdd(B: BuilderRef,
                        LHS: ValueRef,
                        RHS: ValueRef,
                        Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildNSWAdd(B: BuilderRef,
                           LHS: ValueRef,
                           RHS: ValueRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildNUWAdd(B: BuilderRef,
                           LHS: ValueRef,
                           RHS: ValueRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildFAdd(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildSub(B: BuilderRef,
                        LHS: ValueRef,
                        RHS: ValueRef,
                        Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildNSWSub(B: BuilderRef,
                           LHS: ValueRef,
                           RHS: ValueRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildNUWSub(B: BuilderRef,
                           LHS: ValueRef,
                           RHS: ValueRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildFSub(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildMul(B: BuilderRef,
                        LHS: ValueRef,
                        RHS: ValueRef,
                        Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildNSWMul(B: BuilderRef,
                           LHS: ValueRef,
                           RHS: ValueRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildNUWMul(B: BuilderRef,
                           LHS: ValueRef,
                           RHS: ValueRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildFMul(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildUDiv(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildSDiv(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildExactSDiv(B: BuilderRef,
                              LHS: ValueRef,
                              RHS: ValueRef,
                              Name: *const c_char)
                              -> ValueRef;
    pub fn LLVMBuildFDiv(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildURem(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildSRem(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildFRem(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildShl(B: BuilderRef,
                        LHS: ValueRef,
                        RHS: ValueRef,
                        Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildLShr(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildAShr(B: BuilderRef,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildAnd(B: BuilderRef,
                        LHS: ValueRef,
                        RHS: ValueRef,
                        Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildOr(B: BuilderRef,
                       LHS: ValueRef,
                       RHS: ValueRef,
                       Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildXor(B: BuilderRef,
                        LHS: ValueRef,
                        RHS: ValueRef,
                        Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildBinOp(B: BuilderRef,
                          Op: Opcode,
                          LHS: ValueRef,
                          RHS: ValueRef,
                          Name: *const c_char)
                          -> ValueRef;
    pub fn LLVMBuildNeg(B: BuilderRef, V: ValueRef, Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildNSWNeg(B: BuilderRef, V: ValueRef, Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildNUWNeg(B: BuilderRef, V: ValueRef, Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildFNeg(B: BuilderRef, V: ValueRef, Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildNot(B: BuilderRef, V: ValueRef, Name: *const c_char)
                        -> ValueRef;

    /* Memory */
    pub fn LLVMBuildAlloca(B: BuilderRef, Ty: TypeRef, Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildFree(B: BuilderRef, PointerVal: ValueRef) -> ValueRef;
    pub fn LLVMBuildLoad(B: BuilderRef,
                         PointerVal: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;

    pub fn LLVMBuildStore(B: BuilderRef, Val: ValueRef, Ptr: ValueRef)
                          -> ValueRef;

    pub fn LLVMBuildGEP(B: BuilderRef,
                        Pointer: ValueRef,
                        Indices: *const ValueRef,
                        NumIndices: c_uint,
                        Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildInBoundsGEP(B: BuilderRef,
                                Pointer: ValueRef,
                                Indices: *const ValueRef,
                                NumIndices: c_uint,
                                Name: *const c_char)
                                -> ValueRef;
    pub fn LLVMBuildStructGEP(B: BuilderRef,
                              Pointer: ValueRef,
                              Idx: c_uint,
                              Name: *const c_char)
                              -> ValueRef;
    pub fn LLVMBuildGlobalString(B: BuilderRef,
                                 Str: *const c_char,
                                 Name: *const c_char)
                                 -> ValueRef;
    pub fn LLVMBuildGlobalStringPtr(B: BuilderRef,
                                    Str: *const c_char,
                                    Name: *const c_char)
                                    -> ValueRef;

    /* Casts */
    pub fn LLVMBuildTrunc(B: BuilderRef,
                          Val: ValueRef,
                          DestTy: TypeRef,
                          Name: *const c_char)
                          -> ValueRef;
    pub fn LLVMBuildZExt(B: BuilderRef,
                         Val: ValueRef,
                         DestTy: TypeRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildSExt(B: BuilderRef,
                         Val: ValueRef,
                         DestTy: TypeRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildFPToUI(B: BuilderRef,
                           Val: ValueRef,
                           DestTy: TypeRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildFPToSI(B: BuilderRef,
                           Val: ValueRef,
                           DestTy: TypeRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildUIToFP(B: BuilderRef,
                           Val: ValueRef,
                           DestTy: TypeRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildSIToFP(B: BuilderRef,
                           Val: ValueRef,
                           DestTy: TypeRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildFPTrunc(B: BuilderRef,
                            Val: ValueRef,
                            DestTy: TypeRef,
                            Name: *const c_char)
                            -> ValueRef;
    pub fn LLVMBuildFPExt(B: BuilderRef,
                          Val: ValueRef,
                          DestTy: TypeRef,
                          Name: *const c_char)
                          -> ValueRef;
    pub fn LLVMBuildPtrToInt(B: BuilderRef,
                             Val: ValueRef,
                             DestTy: TypeRef,
                             Name: *const c_char)
                             -> ValueRef;
    pub fn LLVMBuildIntToPtr(B: BuilderRef,
                             Val: ValueRef,
                             DestTy: TypeRef,
                             Name: *const c_char)
                             -> ValueRef;
    pub fn LLVMBuildBitCast(B: BuilderRef,
                            Val: ValueRef,
                            DestTy: TypeRef,
                            Name: *const c_char)
                            -> ValueRef;
    pub fn LLVMBuildZExtOrBitCast(B: BuilderRef,
                                  Val: ValueRef,
                                  DestTy: TypeRef,
                                  Name: *const c_char)
                                  -> ValueRef;
    pub fn LLVMBuildSExtOrBitCast(B: BuilderRef,
                                  Val: ValueRef,
                                  DestTy: TypeRef,
                                  Name: *const c_char)
                                  -> ValueRef;
    pub fn LLVMBuildTruncOrBitCast(B: BuilderRef,
                                   Val: ValueRef,
                                   DestTy: TypeRef,
                                   Name: *const c_char)
                                   -> ValueRef;
    pub fn LLVMBuildCast(B: BuilderRef,
                         Op: Opcode,
                         Val: ValueRef,
                         DestTy: TypeRef,
                         Name: *const c_char) -> ValueRef;
    pub fn LLVMBuildPointerCast(B: BuilderRef,
                                Val: ValueRef,
                                DestTy: TypeRef,
                                Name: *const c_char)
                                -> ValueRef;
    pub fn LLVMBuildIntCast(B: BuilderRef,
                            Val: ValueRef,
                            DestTy: TypeRef,
                            Name: *const c_char)
                            -> ValueRef;
    pub fn LLVMBuildFPCast(B: BuilderRef,
                           Val: ValueRef,
                           DestTy: TypeRef,
                           Name: *const c_char)
                           -> ValueRef;

    /* Comparisons */
    pub fn LLVMBuildICmp(B: BuilderRef,
                         Op: c_uint,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildFCmp(B: BuilderRef,
                         Op: c_uint,
                         LHS: ValueRef,
                         RHS: ValueRef,
                         Name: *const c_char)
                         -> ValueRef;

    /* Miscellaneous instructions */
    pub fn LLVMBuildPhi(B: BuilderRef, Ty: TypeRef, Name: *const c_char)
                        -> ValueRef;
    pub fn LLVMBuildCall(B: BuilderRef,
                         Fn: ValueRef,
                         Args: *const ValueRef,
                         NumArgs: c_uint,
                         Name: *const c_char)
                         -> ValueRef;
    pub fn LLVMBuildSelect(B: BuilderRef,
                           If: ValueRef,
                           Then: ValueRef,
                           Else: ValueRef,
                           Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildVAArg(B: BuilderRef,
                          list: ValueRef,
                          Ty: TypeRef,
                          Name: *const c_char)
                          -> ValueRef;
    pub fn LLVMBuildExtractElement(B: BuilderRef,
                                   VecVal: ValueRef,
                                   Index: ValueRef,
                                   Name: *const c_char)
                                   -> ValueRef;
    pub fn LLVMBuildInsertElement(B: BuilderRef,
                                  VecVal: ValueRef,
                                  EltVal: ValueRef,
                                  Index: ValueRef,
                                  Name: *const c_char)
                                  -> ValueRef;
    pub fn LLVMBuildShuffleVector(B: BuilderRef,
                                  V1: ValueRef,
                                  V2: ValueRef,
                                  Mask: ValueRef,
                                  Name: *const c_char)
                                  -> ValueRef;
    pub fn LLVMBuildExtractValue(B: BuilderRef,
                                 AggVal: ValueRef,
                                 Index: c_uint,
                                 Name: *const c_char)
                                 -> ValueRef;
    pub fn LLVMBuildInsertValue(B: BuilderRef,
                                AggVal: ValueRef,
                                EltVal: ValueRef,
                                Index: c_uint,
                                Name: *const c_char)
                                -> ValueRef;

    pub fn LLVMBuildIsNull(B: BuilderRef, Val: ValueRef, Name: *const c_char)
                           -> ValueRef;
    pub fn LLVMBuildIsNotNull(B: BuilderRef, Val: ValueRef, Name: *const c_char)
                              -> ValueRef;
    pub fn LLVMBuildPtrDiff(B: BuilderRef,
                            LHS: ValueRef,
                            RHS: ValueRef,
                            Name: *const c_char)
                            -> ValueRef;

    /* Atomic Operations */
    pub fn LLVMBuildAtomicLoad(B: BuilderRef,
                               PointerVal: ValueRef,
                               Name: *const c_char,
                               Order: AtomicOrdering,
                               Alignment: c_uint)
                               -> ValueRef;

    pub fn LLVMBuildAtomicStore(B: BuilderRef,
                                Val: ValueRef,
                                Ptr: ValueRef,
                                Order: AtomicOrdering,
                                Alignment: c_uint)
                                -> ValueRef;

    pub fn LLVMBuildAtomicCmpXchg(B: BuilderRef,
                                  LHS: ValueRef,
                                  CMP: ValueRef,
                                  RHS: ValueRef,
                                  Order: AtomicOrdering,
                                  FailureOrder: AtomicOrdering)
                                  -> ValueRef;
    pub fn LLVMBuildAtomicRMW(B: BuilderRef,
                              Op: AtomicBinOp,
                              LHS: ValueRef,
                              RHS: ValueRef,
                              Order: AtomicOrdering,
                              SingleThreaded: Bool)
                              -> ValueRef;

    pub fn LLVMBuildAtomicFence(B: BuilderRef,
                                Order: AtomicOrdering,
                                Scope: SynchronizationScope);


    /* Selected entries from the downcasts. */
    pub fn LLVMIsATerminatorInst(Inst: ValueRef) -> ValueRef;
    pub fn LLVMIsAStoreInst(Inst: ValueRef) -> ValueRef;

    /// Writes a module to the specified path. Returns 0 on success.
    pub fn LLVMWriteBitcodeToFile(M: ModuleRef, Path: *const c_char) -> c_int;

    /// Creates target data from a target layout string.
    pub fn LLVMCreateTargetData(StringRep: *const c_char) -> TargetDataRef;
    /// Adds the target data to the given pass manager. The pass manager
    /// references the target data only weakly.
    pub fn LLVMAddTargetData(TD: TargetDataRef, PM: PassManagerRef);
    /// Number of bytes clobbered when doing a Store to *T.
    pub fn LLVMStoreSizeOfType(TD: TargetDataRef, Ty: TypeRef)
                               -> c_ulonglong;

    /// Number of bytes clobbered when doing a Store to *T.
    pub fn LLVMSizeOfTypeInBits(TD: TargetDataRef, Ty: TypeRef)
                                -> c_ulonglong;

    /// Distance between successive elements in an array of T. Includes ABI padding.
    pub fn LLVMABISizeOfType(TD: TargetDataRef, Ty: TypeRef) -> c_ulonglong;

    /// Returns the preferred alignment of a type.
    pub fn LLVMPreferredAlignmentOfType(TD: TargetDataRef, Ty: TypeRef)
                                        -> c_uint;
    /// Returns the minimum alignment of a type.
    pub fn LLVMABIAlignmentOfType(TD: TargetDataRef, Ty: TypeRef)
                                  -> c_uint;

    /// Computes the byte offset of the indexed struct element for a
    /// target.
    pub fn LLVMOffsetOfElement(TD: TargetDataRef,
                               StructTy: TypeRef,
                               Element: c_uint)
                               -> c_ulonglong;

    /// Returns the minimum alignment of a type when part of a call frame.
    pub fn LLVMCallFrameAlignmentOfType(TD: TargetDataRef, Ty: TypeRef)
                                        -> c_uint;

    /// Disposes target data.
    pub fn LLVMDisposeTargetData(TD: TargetDataRef);

    /// Creates a pass manager.
    pub fn LLVMCreatePassManager() -> PassManagerRef;

    /// Creates a function-by-function pass manager
    pub fn LLVMCreateFunctionPassManagerForModule(M: ModuleRef)
                                                  -> PassManagerRef;

    /// Disposes a pass manager.
    pub fn LLVMDisposePassManager(PM: PassManagerRef);

    /// Runs a pass manager on a module.
    pub fn LLVMRunPassManager(PM: PassManagerRef, M: ModuleRef) -> Bool;

    /// Runs the function passes on the provided function.
    pub fn LLVMRunFunctionPassManager(FPM: PassManagerRef, F: ValueRef)
                                      -> Bool;

    /// Initializes all the function passes scheduled in the manager
    pub fn LLVMInitializeFunctionPassManager(FPM: PassManagerRef) -> Bool;

    /// Finalizes all the function passes scheduled in the manager
    pub fn LLVMFinalizeFunctionPassManager(FPM: PassManagerRef) -> Bool;

    pub fn LLVMInitializePasses();

    /// Adds a verification pass.
    pub fn LLVMAddVerifierPass(PM: PassManagerRef);

    pub fn LLVMAddGlobalOptimizerPass(PM: PassManagerRef);
    pub fn LLVMAddIPSCCPPass(PM: PassManagerRef);
    pub fn LLVMAddDeadArgEliminationPass(PM: PassManagerRef);
    pub fn LLVMAddInstructionCombiningPass(PM: PassManagerRef);
    pub fn LLVMAddCFGSimplificationPass(PM: PassManagerRef);
    pub fn LLVMAddFunctionInliningPass(PM: PassManagerRef);
    pub fn LLVMAddFunctionAttrsPass(PM: PassManagerRef);
    pub fn LLVMAddScalarReplAggregatesPass(PM: PassManagerRef);
    pub fn LLVMAddScalarReplAggregatesPassSSA(PM: PassManagerRef);
    pub fn LLVMAddJumpThreadingPass(PM: PassManagerRef);
    pub fn LLVMAddConstantPropagationPass(PM: PassManagerRef);
    pub fn LLVMAddReassociatePass(PM: PassManagerRef);
    pub fn LLVMAddLoopRotatePass(PM: PassManagerRef);
    pub fn LLVMAddLICMPass(PM: PassManagerRef);
    pub fn LLVMAddLoopUnswitchPass(PM: PassManagerRef);
    pub fn LLVMAddLoopDeletionPass(PM: PassManagerRef);
    pub fn LLVMAddLoopUnrollPass(PM: PassManagerRef);
    pub fn LLVMAddGVNPass(PM: PassManagerRef);
    pub fn LLVMAddMemCpyOptPass(PM: PassManagerRef);
    pub fn LLVMAddSCCPPass(PM: PassManagerRef);
    pub fn LLVMAddDeadStoreEliminationPass(PM: PassManagerRef);
    pub fn LLVMAddStripDeadPrototypesPass(PM: PassManagerRef);
    pub fn LLVMAddConstantMergePass(PM: PassManagerRef);
    pub fn LLVMAddArgumentPromotionPass(PM: PassManagerRef);
    pub fn LLVMAddTailCallEliminationPass(PM: PassManagerRef);
    pub fn LLVMAddIndVarSimplifyPass(PM: PassManagerRef);
    pub fn LLVMAddAggressiveDCEPass(PM: PassManagerRef);
    pub fn LLVMAddGlobalDCEPass(PM: PassManagerRef);
    pub fn LLVMAddCorrelatedValuePropagationPass(PM: PassManagerRef);
    pub fn LLVMAddPruneEHPass(PM: PassManagerRef);
    pub fn LLVMAddSimplifyLibCallsPass(PM: PassManagerRef);
    pub fn LLVMAddLoopIdiomPass(PM: PassManagerRef);
    pub fn LLVMAddEarlyCSEPass(PM: PassManagerRef);
    pub fn LLVMAddTypeBasedAliasAnalysisPass(PM: PassManagerRef);
    pub fn LLVMAddBasicAliasAnalysisPass(PM: PassManagerRef);

    pub fn LLVMPassManagerBuilderCreate() -> PassManagerBuilderRef;
    pub fn LLVMPassManagerBuilderDispose(PMB: PassManagerBuilderRef);
    pub fn LLVMPassManagerBuilderSetOptLevel(PMB: PassManagerBuilderRef,
                                             OptimizationLevel: c_uint);
    pub fn LLVMPassManagerBuilderSetSizeLevel(PMB: PassManagerBuilderRef,
                                              Value: Bool);
    pub fn LLVMPassManagerBuilderSetDisableUnitAtATime(
        PMB: PassManagerBuilderRef,
        Value: Bool);
    pub fn LLVMPassManagerBuilderSetDisableUnrollLoops(
        PMB: PassManagerBuilderRef,
        Value: Bool);
    pub fn LLVMPassManagerBuilderSetDisableSimplifyLibCalls(
        PMB: PassManagerBuilderRef,
        Value: Bool);
    pub fn LLVMPassManagerBuilderUseInlinerWithThreshold(
        PMB: PassManagerBuilderRef,
        threshold: c_uint);
    pub fn LLVMPassManagerBuilderPopulateModulePassManager(
        PMB: PassManagerBuilderRef,
        PM: PassManagerRef);

    pub fn LLVMPassManagerBuilderPopulateFunctionPassManager(
        PMB: PassManagerBuilderRef,
        PM: PassManagerRef);
    pub fn LLVMPassManagerBuilderPopulateLTOPassManager(
        PMB: PassManagerBuilderRef,
        PM: PassManagerRef,
        Internalize: Bool,
        RunInliner: Bool);

    /// Destroys a memory buffer.
    pub fn LLVMDisposeMemoryBuffer(MemBuf: MemoryBufferRef);


    /* Stuff that's in rustllvm/ because it's not upstream yet. */

    /// Opens an object file.
    pub fn LLVMCreateObjectFile(MemBuf: MemoryBufferRef) -> ObjectFileRef;
    /// Closes an object file.
    pub fn LLVMDisposeObjectFile(ObjFile: ObjectFileRef);

    /// Enumerates the sections in an object file.
    pub fn LLVMGetSections(ObjFile: ObjectFileRef) -> SectionIteratorRef;
    /// Destroys a section iterator.
    pub fn LLVMDisposeSectionIterator(SI: SectionIteratorRef);
    /// Returns true if the section iterator is at the end of the section
    /// list:
    pub fn LLVMIsSectionIteratorAtEnd(ObjFile: ObjectFileRef,
                                      SI: SectionIteratorRef)
                                      -> Bool;
    /// Moves the section iterator to point to the next section.
    pub fn LLVMMoveToNextSection(SI: SectionIteratorRef);
    /// Returns the current section size.
    pub fn LLVMGetSectionSize(SI: SectionIteratorRef) -> c_ulonglong;
    /// Returns the current section contents as a string buffer.
    pub fn LLVMGetSectionContents(SI: SectionIteratorRef) -> *const c_char;

    /// Reads the given file and returns it as a memory buffer. Use
    /// LLVMDisposeMemoryBuffer() to get rid of it.
    pub fn LLVMRustCreateMemoryBufferWithContentsOfFile(Path: *const c_char)
                                                        -> MemoryBufferRef;
    /// Borrows the contents of the memory buffer (doesn't copy it)
    pub fn LLVMCreateMemoryBufferWithMemoryRange(InputData: *const c_char,
                                                 InputDataLength: size_t,
                                                 BufferName: *const c_char,
                                                 RequiresNull: Bool)
                                                 -> MemoryBufferRef;
    pub fn LLVMCreateMemoryBufferWithMemoryRangeCopy(InputData: *const c_char,
                                                     InputDataLength: size_t,
                                                     BufferName: *const c_char)
                                                     -> MemoryBufferRef;

    pub fn LLVMIsMultithreaded() -> Bool;
    pub fn LLVMStartMultithreaded() -> Bool;

    /// Returns a string describing the last error caused by an LLVMRust* call.
    pub fn LLVMRustGetLastError() -> *const c_char;

    /// Print the pass timings since static dtors aren't picking them up.
    pub fn LLVMRustPrintPassTimings();

    pub fn LLVMStructCreateNamed(C: ContextRef, Name: *const c_char) -> TypeRef;

    pub fn LLVMStructSetBody(StructTy: TypeRef,
                             ElementTypes: *const TypeRef,
                             ElementCount: c_uint,
                             Packed: Bool);

    pub fn LLVMConstNamedStruct(S: TypeRef,
                                ConstantVals: *const ValueRef,
                                Count: c_uint)
                                -> ValueRef;

    /// Enables LLVM debug output.
    pub fn LLVMSetDebug(Enabled: c_int);

    /// Prepares inline assembly.
    pub fn LLVMInlineAsm(Ty: TypeRef,
                         AsmString: *const c_char,
                         Constraints: *const c_char,
                         SideEffects: Bool,
                         AlignStack: Bool,
                         Dialect: c_uint)
                         -> ValueRef;

    pub fn LLVMRustDebugMetadataVersion() -> u32;
    pub fn LLVMVersionMajor() -> u32;
    pub fn LLVMVersionMinor() -> u32;

    pub fn LLVMRustAddModuleFlag(M: ModuleRef,
                                 name: *const c_char,
                                 value: u32);

    pub fn LLVMDIBuilderCreate(M: ModuleRef) -> DIBuilderRef;

    pub fn LLVMDIBuilderDispose(Builder: DIBuilderRef);

    pub fn LLVMDIBuilderFinalize(Builder: DIBuilderRef);

    pub fn LLVMDIBuilderCreateCompileUnit(Builder: DIBuilderRef,
                                          Lang: c_uint,
                                          File: *const c_char,
                                          Dir: *const c_char,
                                          Producer: *const c_char,
                                          isOptimized: bool,
                                          Flags: *const c_char,
                                          RuntimeVer: c_uint,
                                          SplitName: *const c_char)
                                          -> DIDescriptor;

    pub fn LLVMDIBuilderCreateFile(Builder: DIBuilderRef,
                                   Filename: *const c_char,
                                   Directory: *const c_char)
                                   -> DIFile;

    pub fn LLVMDIBuilderCreateSubroutineType(Builder: DIBuilderRef,
                                             File: DIFile,
                                             ParameterTypes: DIArray)
                                             -> DICompositeType;

    pub fn LLVMDIBuilderCreateFunction(Builder: DIBuilderRef,
                                       Scope: DIDescriptor,
                                       Name: *const c_char,
                                       LinkageName: *const c_char,
                                       File: DIFile,
                                       LineNo: c_uint,
                                       Ty: DIType,
                                       isLocalToUnit: bool,
                                       isDefinition: bool,
                                       ScopeLine: c_uint,
                                       Flags: c_uint,
                                       isOptimized: bool,
                                       Fn: ValueRef,
                                       TParam: DIArray,
                                       Decl: DIDescriptor)
                                       -> DISubprogram;

    pub fn LLVMDIBuilderCreateBasicType(Builder: DIBuilderRef,
                                        Name: *const c_char,
                                        SizeInBits: c_ulonglong,
                                        AlignInBits: c_ulonglong,
                                        Encoding: c_uint)
                                        -> DIBasicType;

    pub fn LLVMDIBuilderCreatePointerType(Builder: DIBuilderRef,
                                          PointeeTy: DIType,
                                          SizeInBits: c_ulonglong,
                                          AlignInBits: c_ulonglong,
                                          Name: *const c_char)
                                          -> DIDerivedType;

    pub fn LLVMDIBuilderCreateStructType(Builder: DIBuilderRef,
                                         Scope: DIDescriptor,
                                         Name: *const c_char,
                                         File: DIFile,
                                         LineNumber: c_uint,
                                         SizeInBits: c_ulonglong,
                                         AlignInBits: c_ulonglong,
                                         Flags: c_uint,
                                         DerivedFrom: DIType,
                                         Elements: DIArray,
                                         RunTimeLang: c_uint,
                                         VTableHolder: DIType,
                                         UniqueId: *const c_char)
                                         -> DICompositeType;

    pub fn LLVMDIBuilderCreateMemberType(Builder: DIBuilderRef,
                                         Scope: DIDescriptor,
                                         Name: *const c_char,
                                         File: DIFile,
                                         LineNo: c_uint,
                                         SizeInBits: c_ulonglong,
                                         AlignInBits: c_ulonglong,
                                         OffsetInBits: c_ulonglong,
                                         Flags: c_uint,
                                         Ty: DIType)
                                         -> DIDerivedType;

    pub fn LLVMDIBuilderCreateLexicalBlock(Builder: DIBuilderRef,
                                           Scope: DIScope,
                                           File: DIFile,
                                           Line: c_uint,
                                           Col: c_uint)
                                           -> DILexicalBlock;

    pub fn LLVMDIBuilderCreateStaticVariable(Builder: DIBuilderRef,
                                             Context: DIScope,
                                             Name: *const c_char,
                                             LinkageName: *const c_char,
                                             File: DIFile,
                                             LineNo: c_uint,
                                             Ty: DIType,
                                             isLocalToUnit: bool,
                                             Val: ValueRef,
                                             Decl: DIDescriptor)
                                             -> DIGlobalVariable;

    pub fn LLVMDIBuilderCreateVariable(Builder: DIBuilderRef,
                                            Tag: c_uint,
                                            Scope: DIDescriptor,
                                            Name: *const c_char,
                                            File: DIFile,
                                            LineNo: c_uint,
                                            Ty: DIType,
                                            AlwaysPreserve: bool,
                                            Flags: c_uint,
                                            AddrOps: *const i64,
                                            AddrOpsCount: c_uint,
                                            ArgNo: c_uint)
                                            -> DIVariable;

    pub fn LLVMDIBuilderCreateArrayType(Builder: DIBuilderRef,
                                        Size: c_ulonglong,
                                        AlignInBits: c_ulonglong,
                                        Ty: DIType,
                                        Subscripts: DIArray)
                                        -> DIType;

    pub fn LLVMDIBuilderCreateVectorType(Builder: DIBuilderRef,
                                         Size: c_ulonglong,
                                         AlignInBits: c_ulonglong,
                                         Ty: DIType,
                                         Subscripts: DIArray)
                                         -> DIType;

    pub fn LLVMDIBuilderGetOrCreateSubrange(Builder: DIBuilderRef,
                                            Lo: c_longlong,
                                            Count: c_longlong)
                                            -> DISubrange;

    pub fn LLVMDIBuilderGetOrCreateArray(Builder: DIBuilderRef,
                                         Ptr: *const DIDescriptor,
                                         Count: c_uint)
                                         -> DIArray;

    pub fn LLVMDIBuilderInsertDeclareAtEnd(Builder: DIBuilderRef,
                                           Val: ValueRef,
                                           VarInfo: DIVariable,
                                           AddrOps: *const i64,
                                           AddrOpsCount: c_uint,
                                           DL: ValueRef,
                                           InsertAtEnd: BasicBlockRef)
                                           -> ValueRef;

    pub fn LLVMDIBuilderInsertDeclareBefore(Builder: DIBuilderRef,
                                            Val: ValueRef,
                                            VarInfo: DIVariable,
                                            AddrOps: *const i64,
                                            AddrOpsCount: c_uint,
                                            DL: ValueRef,
                                            InsertBefore: ValueRef)
                                            -> ValueRef;

    pub fn LLVMDIBuilderCreateEnumerator(Builder: DIBuilderRef,
                                         Name: *const c_char,
                                         Val: c_ulonglong)
                                         -> DIEnumerator;

    pub fn LLVMDIBuilderCreateEnumerationType(Builder: DIBuilderRef,
                                              Scope: DIScope,
                                              Name: *const c_char,
                                              File: DIFile,
                                              LineNumber: c_uint,
                                              SizeInBits: c_ulonglong,
                                              AlignInBits: c_ulonglong,
                                              Elements: DIArray,
                                              ClassType: DIType)
                                              -> DIType;

    pub fn LLVMDIBuilderCreateUnionType(Builder: DIBuilderRef,
                                        Scope: DIScope,
                                        Name: *const c_char,
                                        File: DIFile,
                                        LineNumber: c_uint,
                                        SizeInBits: c_ulonglong,
                                        AlignInBits: c_ulonglong,
                                        Flags: c_uint,
                                        Elements: DIArray,
                                        RunTimeLang: c_uint,
                                        UniqueId: *const c_char)
                                        -> DIType;

    pub fn LLVMSetUnnamedAddr(GlobalVar: ValueRef, UnnamedAddr: Bool);

    pub fn LLVMDIBuilderCreateTemplateTypeParameter(Builder: DIBuilderRef,
                                                    Scope: DIScope,
                                                    Name: *const c_char,
                                                    Ty: DIType,
                                                    File: DIFile,
                                                    LineNo: c_uint,
                                                    ColumnNo: c_uint)
                                                    -> DITemplateTypeParameter;

    pub fn LLVMDIBuilderCreateOpDeref() -> i64;

    pub fn LLVMDIBuilderCreateOpPlus() -> i64;

    pub fn LLVMDIBuilderCreateNameSpace(Builder: DIBuilderRef,
                                        Scope: DIScope,
                                        Name: *const c_char,
                                        File: DIFile,
                                        LineNo: c_uint)
                                        -> DINameSpace;

    pub fn LLVMDIBuilderCreateDebugLocation(Context: ContextRef,
                                            Line: c_uint,
                                            Column: c_uint,
                                            Scope: DIScope,
                                            InlinedAt: MetadataRef)
                                            -> ValueRef;

    pub fn LLVMDICompositeTypeSetTypeArray(Builder: DIBuilderRef,
                                           CompositeType: DIType,
                                           TypeArray: DIArray);
    pub fn LLVMWriteTypeToString(Type: TypeRef, s: RustStringRef);
    pub fn LLVMWriteValueToString(value_ref: ValueRef, s: RustStringRef);

    pub fn LLVMIsAArgument(value_ref: ValueRef) -> ValueRef;

    pub fn LLVMIsAAllocaInst(value_ref: ValueRef) -> ValueRef;
    pub fn LLVMIsAConstantInt(value_ref: ValueRef) -> ValueRef;

    pub fn LLVMInitializeX86TargetInfo();
    pub fn LLVMInitializeX86Target();
    pub fn LLVMInitializeX86TargetMC();
    pub fn LLVMInitializeX86AsmPrinter();
    pub fn LLVMInitializeX86AsmParser();
    pub fn LLVMInitializeARMTargetInfo();
    pub fn LLVMInitializeARMTarget();
    pub fn LLVMInitializeARMTargetMC();
    pub fn LLVMInitializeARMAsmPrinter();
    pub fn LLVMInitializeARMAsmParser();
    pub fn LLVMInitializeAArch64TargetInfo();
    pub fn LLVMInitializeAArch64Target();
    pub fn LLVMInitializeAArch64TargetMC();
    pub fn LLVMInitializeAArch64AsmPrinter();
    pub fn LLVMInitializeAArch64AsmParser();
    pub fn LLVMInitializeMipsTargetInfo();
    pub fn LLVMInitializeMipsTarget();
    pub fn LLVMInitializeMipsTargetMC();
    pub fn LLVMInitializeMipsAsmPrinter();
    pub fn LLVMInitializeMipsAsmParser();
    pub fn LLVMInitializePowerPCTargetInfo();
    pub fn LLVMInitializePowerPCTarget();
    pub fn LLVMInitializePowerPCTargetMC();
    pub fn LLVMInitializePowerPCAsmPrinter();
    pub fn LLVMInitializePowerPCAsmParser();

    pub fn LLVMRustAddPass(PM: PassManagerRef, Pass: *const c_char) -> bool;
    pub fn LLVMRustCreateTargetMachine(Triple: *const c_char,
                                       CPU: *const c_char,
                                       Features: *const c_char,
                                       Model: CodeGenModel,
                                       Reloc: RelocMode,
                                       Level: CodeGenOptLevel,
                                       EnableSegstk: bool,
                                       UseSoftFP: bool,
                                       PositionIndependentExecutable: bool,
                                       FunctionSections: bool,
                                       DataSections: bool) -> TargetMachineRef;
    pub fn LLVMRustDisposeTargetMachine(T: TargetMachineRef);
    pub fn LLVMRustAddAnalysisPasses(T: TargetMachineRef,
                                     PM: PassManagerRef,
                                     M: ModuleRef);
    pub fn LLVMRustAddBuilderLibraryInfo(PMB: PassManagerBuilderRef,
                                         M: ModuleRef,
                                         DisableSimplifyLibCalls: bool);
    pub fn LLVMRustConfigurePassManagerBuilder(PMB: PassManagerBuilderRef,
                                               OptLevel: CodeGenOptLevel,
                                               MergeFunctions: bool,
                                               SLPVectorize: bool,
                                               LoopVectorize: bool);
    pub fn LLVMRustAddLibraryInfo(PM: PassManagerRef, M: ModuleRef,
                                  DisableSimplifyLibCalls: bool);
    pub fn LLVMRustRunFunctionPassManager(PM: PassManagerRef, M: ModuleRef);
    pub fn LLVMRustWriteOutputFile(T: TargetMachineRef,
                                   PM: PassManagerRef,
                                   M: ModuleRef,
                                   Output: *const c_char,
                                   FileType: FileType) -> bool;
    pub fn LLVMRustPrintModule(PM: PassManagerRef,
                               M: ModuleRef,
                               Output: *const c_char);
    pub fn LLVMRustSetLLVMOptions(Argc: c_int, Argv: *const *const c_char);
    pub fn LLVMRustPrintPasses();
    pub fn LLVMRustSetNormalizedTarget(M: ModuleRef, triple: *const c_char);
    pub fn LLVMRustAddAlwaysInlinePass(P: PassManagerBuilderRef,
                                       AddLifetimes: bool);
    pub fn LLVMRustLinkInExternalBitcode(M: ModuleRef,
                                         bc: *const c_char,
                                         len: size_t) -> bool;
    pub fn LLVMRustRunRestrictionPass(M: ModuleRef,
                                      syms: *const *const c_char,
                                      len: size_t);
    pub fn LLVMRustMarkAllFunctionsNounwind(M: ModuleRef);

    pub fn LLVMRustOpenArchive(path: *const c_char) -> ArchiveRef;
    pub fn LLVMRustArchiveIteratorNew(AR: ArchiveRef) -> ArchiveIteratorRef;
    pub fn LLVMRustArchiveIteratorNext(AIR: ArchiveIteratorRef) -> ArchiveChildRef;
    pub fn LLVMRustArchiveChildName(ACR: ArchiveChildRef,
                                    size: *mut size_t) -> *const c_char;
    pub fn LLVMRustArchiveChildData(ACR: ArchiveChildRef,
                                    size: *mut size_t) -> *const c_char;
    pub fn LLVMRustArchiveChildFree(ACR: ArchiveChildRef);
    pub fn LLVMRustArchiveIteratorFree(AIR: ArchiveIteratorRef);
    pub fn LLVMRustDestroyArchive(AR: ArchiveRef);

    pub fn LLVMRustSetDLLStorageClass(V: ValueRef,
                                      C: DLLStorageClassTypes);

    pub fn LLVMRustGetSectionName(SI: SectionIteratorRef,
                                  data: *mut *const c_char) -> c_int;

    pub fn LLVMWriteTwineToString(T: TwineRef, s: RustStringRef);

    pub fn LLVMContextSetDiagnosticHandler(C: ContextRef,
                                           Handler: DiagnosticHandler,
                                           DiagnosticContext: *mut c_void);

    pub fn LLVMUnpackOptimizationDiagnostic(DI: DiagnosticInfoRef,
                                            pass_name_out: *mut *const c_char,
                                            function_out: *mut ValueRef,
                                            debugloc_out: *mut DebugLocRef,
                                            message_out: *mut TwineRef);
    pub fn LLVMUnpackInlineAsmDiagnostic(DI: DiagnosticInfoRef,
                                            cookie_out: *mut c_uint,
                                            message_out: *mut TwineRef,
                                            instruction_out: *mut ValueRef);

    pub fn LLVMWriteDiagnosticInfoToString(DI: DiagnosticInfoRef, s: RustStringRef);
    pub fn LLVMGetDiagInfoSeverity(DI: DiagnosticInfoRef) -> DiagnosticSeverity;
    pub fn LLVMGetDiagInfoKind(DI: DiagnosticInfoRef) -> DiagnosticKind;

    pub fn LLVMWriteDebugLocToString(C: ContextRef, DL: DebugLocRef, s: RustStringRef);

    pub fn LLVMSetInlineAsmDiagnosticHandler(C: ContextRef,
                                             H: InlineAsmDiagHandler,
                                             CX: *mut c_void);

    pub fn LLVMWriteSMDiagnosticToString(d: SMDiagnosticRef, s: RustStringRef);

    pub fn LLVMRustWriteArchive(Dst: *const c_char,
                                NumMembers: size_t,
                                Members: *const RustArchiveMemberRef,
                                WriteSymbtab: bool,
                                Kind: ArchiveKind) -> c_int;
    pub fn LLVMRustArchiveMemberNew(Filename: *const c_char,
                                    Name: *const c_char,
                                    Child: ArchiveChildRef) -> RustArchiveMemberRef;
    pub fn LLVMRustArchiveMemberFree(Member: RustArchiveMemberRef);

    pub fn LLVMRustSetDataLayoutFromTargetMachine(M: ModuleRef,
                                                  TM: TargetMachineRef);
    pub fn LLVMRustGetModuleDataLayout(M: ModuleRef) -> TargetDataRef;
}

// LLVM requires symbols from this library, but apparently they're not printed
// during llvm-config?
#[cfg(windows)]
#[link(name = "ole32")]
extern {}

pub fn SetInstructionCallConv(instr: ValueRef, cc: CallConv) {
    unsafe {
        LLVMSetInstructionCallConv(instr, cc as c_uint);
    }
}
pub fn SetFunctionCallConv(fn_: ValueRef, cc: CallConv) {
    unsafe {
        LLVMSetFunctionCallConv(fn_, cc as c_uint);
    }
}
pub fn SetLinkage(global: ValueRef, link: Linkage) {
    unsafe {
        LLVMSetLinkage(global, link as c_uint);
    }
}

pub fn SetDLLStorageClass(global: ValueRef, class: DLLStorageClassTypes) {
    unsafe {
        LLVMRustSetDLLStorageClass(global, class);
    }
}

pub fn SetUnnamedAddr(global: ValueRef, unnamed: bool) {
    unsafe {
        LLVMSetUnnamedAddr(global, unnamed as Bool);
    }
}

pub fn set_thread_local(global: ValueRef, is_thread_local: bool) {
    unsafe {
        LLVMSetThreadLocal(global, is_thread_local as Bool);
    }
}

pub fn ConstICmp(pred: IntPredicate, v1: ValueRef, v2: ValueRef) -> ValueRef {
    unsafe {
        LLVMConstICmp(pred as c_ushort, v1, v2)
    }
}
pub fn ConstFCmp(pred: RealPredicate, v1: ValueRef, v2: ValueRef) -> ValueRef {
    unsafe {
        LLVMConstFCmp(pred as c_ushort, v1, v2)
    }
}

pub fn SetFunctionAttribute(fn_: ValueRef, attr: Attribute) {
    unsafe {
        LLVMAddFunctionAttribute(fn_, FunctionIndex as c_uint,
                                 attr.bits() as uint64_t)
    }
}

/* Memory-managed interface to target data. */

pub struct TargetData {
    pub lltd: TargetDataRef
}

impl Drop for TargetData {
    fn drop(&mut self) {
        unsafe {
            LLVMDisposeTargetData(self.lltd);
        }
    }
}

pub fn mk_target_data(string_rep: &str) -> TargetData {
    let string_rep = CString::new(string_rep).unwrap();
    TargetData {
        lltd: unsafe { LLVMCreateTargetData(string_rep.as_ptr()) }
    }
}

/* Memory-managed interface to object files. */

pub struct ObjectFile {
    pub llof: ObjectFileRef,
}

impl ObjectFile {
    // This will take ownership of llmb
    pub fn new(llmb: MemoryBufferRef) -> Option<ObjectFile> {
        unsafe {
            let llof = LLVMCreateObjectFile(llmb);
            if llof as isize == 0 {
                // LLVMCreateObjectFile took ownership of llmb
                return None
            }

            Some(ObjectFile {
                llof: llof,
            })
        }
    }
}

impl Drop for ObjectFile {
    fn drop(&mut self) {
        unsafe {
            LLVMDisposeObjectFile(self.llof);
        }
    }
}

/* Memory-managed interface to section iterators. */

pub struct SectionIter {
    pub llsi: SectionIteratorRef
}

impl Drop for SectionIter {
    fn drop(&mut self) {
        unsafe {
            LLVMDisposeSectionIterator(self.llsi);
        }
    }
}

pub fn mk_section_iter(llof: ObjectFileRef) -> SectionIter {
    unsafe {
        SectionIter {
            llsi: LLVMGetSections(llof)
        }
    }
}

/// Safe wrapper around `LLVMGetParam`, because segfaults are no fun.
pub fn get_param(llfn: ValueRef, index: c_uint) -> ValueRef {
    unsafe {
        assert!(index < LLVMCountParams(llfn));
        LLVMGetParam(llfn, index)
    }
}

pub fn get_params(llfn: ValueRef) -> Vec<ValueRef> {
    unsafe {
        let num_params = LLVMCountParams(llfn);
        let mut params = Vec::with_capacity(num_params as usize);
        for idx in 0..num_params {
            params.push(LLVMGetParam(llfn, idx));
        }

        params
    }
}

#[allow(missing_copy_implementations)]
pub enum RustString_opaque {}
pub type RustStringRef = *mut RustString_opaque;
type RustStringRepr = *mut RefCell<Vec<u8>>;

/// Appending to a Rust string -- used by raw_rust_string_ostream.
#[no_mangle]
pub unsafe extern "C" fn rust_llvm_string_write_impl(sr: RustStringRef,
                                                     ptr: *const c_char,
                                                     size: size_t) {
    let slice = slice::from_raw_parts(ptr as *const u8, size as usize);

    let sr: RustStringRepr = mem::transmute(sr);
    (*sr).borrow_mut().push_all(slice);
}

pub fn build_string<F>(f: F) -> Option<String> where F: FnOnce(RustStringRef){
    let mut buf = RefCell::new(Vec::new());
    f(&mut buf as RustStringRepr as RustStringRef);
    String::from_utf8(buf.into_inner()).ok()
}

pub unsafe fn twine_to_string(tr: TwineRef) -> String {
    build_string(|s| LLVMWriteTwineToString(tr, s))
        .expect("got a non-UTF8 Twine from LLVM")
}

pub unsafe fn debug_loc_to_string(c: ContextRef, tr: DebugLocRef) -> String {
    build_string(|s| LLVMWriteDebugLocToString(c, tr, s))
        .expect("got a non-UTF8 DebugLoc from LLVM")
}

// The module containing the native LLVM dependencies, generated by the build system
// Note that this must come after the rustllvm extern declaration so that
// parts of LLVM that rustllvm depends on aren't thrown away by the linker.
// Works to the above fix for #15460 to ensure LLVM dependencies that
// are only used by rustllvm don't get stripped by the linker.
mod llvmdeps {
    include! { env!("CFG_LLVM_LINKAGE_FILE") }
}