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ullvm_c.py
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ullvm_c.py
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# ullvm - Lightweight bindings for LLVM C API
#
# This module is part of the Pycopy https://github.com/pfalcon/pycopy
# project.
#
# Copyright (c) 2018-2021 Paul Sokolovsky
#
# The MIT License
import ffi
from uarray import array
import ullvm_c_conf
assert ullvm_c_conf.dynlib
L = ffi.open(ullvm_c_conf.dynlib)
def F(ret, name, params):
globals()[name] = L.func(ret, name, params)
# Initializer for functions which need Python wrappers.
def F_(ret, name, params):
globals()[name + "_"] = L.func(ret, name, params)
LLVMAbortProcessAction = 0
LLVMPrintMessageAction = 1
LLVMReturnStatusAction = 2
# LLVMCodeGenOptLevel;
LLVMCodeGenLevelNone = 0
LLVMCodeGenLevelLess = 1
LLVMCodeGenLevelDefault = 2
LLVMCodeGenLevelAggressive = 3
# LLVMRelocMode;
LLVMRelocDefault = 0
LLVMRelocStatic = 1
LLVMRelocPIC = 2
LLVMRelocDynamicNoPic = 3
# LLVMCodeModel;
LLVMCodeModelDefault = 0
LLVMCodeModelJITDefault = 1
LLVMCodeModelSmall = 2
LLVMCodeModelKernel = 3
LLVMCodeModelMedium = 4
LLVMCodeModelLarge = 5
# Type methods
F("P", "LLVMVoidType", "")
F("P", "LLVMInt8Type", "")
F("P", "LLVMInt16Type", "")
F("P", "LLVMInt32Type", "")
F("P", "LLVMInt64Type", "")
F("P", "LLVMIntType", "I")
F("P", "LLVMFloatType", "")
F("P", "LLVMDoubleType", "")
F("P", "LLVMPointerType", "PI")
F_("P", "LLVMFunctionType", "PPIi")
F("P", "LLVMGetElementType", "P")
# Struct type methods
F("P", "LLVMStructCreateNamed", "Ps")
F("v", "LLVMStructSetBody", "PpII")
# Value methods
F("s", "LLVMGetValueName", "P")
F("v", "LLVMSetValueName", "Ps")
F("P", "LLVMTypeOf", "P")
F("P", "LLVMConstInt", "PQI")
F("P", "LLVMConstString", "sII")
F("P", "LLVMConstIntToPtr", "PP")
F("v", "LLVMSetInitializer", "PP")
# Module methods
F("P", "LLVMModuleCreateWithName", "s")
F("i", "LLVMVerifyModule", "PIp")
F("v", "LLVMDumpModule", "P")
F_("s", "LLVMPrintModuleToString", "P")
F_("i", "LLVMParseBitcode2", "Pp")
F("i", "LLVMWriteBitcodeToFile", "Ps")
F_("i", "LLVMParseIRInContext", "PPpp")
F("P", "LLVMAddGlobal", "PPs")
F("P", "LLVMAddFunction", "PsP")
F("P", "LLVMGetFirstFunction", "P")
F("P", "LLVMGetNextFunction", "P")
# Function methods
F("P", "LLVMAppendBasicBlock", "Ps")
F("P", "LLVMGetFirstBasicBlock", "P")
F("P", "LLVMGetNextBasicBlock", "P")
F("I", "LLVMCountParams", "P")
F("P", "LLVMGetParam", "PI")
# Basic Block methods
F("P", "LLVMGetFirstInstruction", "P")
# Instruction methods
F("P", "LLVMGetNextInstruction", "P")
F("i", "LLVMGetInstructionOpcode", "P")
# Builder methods
F("P", "LLVMCreateBuilder", "")
F("v", "LLVMPositionBuilderAtEnd", "PP")
F("P", "LLVMBuildAlloca", "PPs")
F("P", "LLVMBuildLoad", "PPs")
F("P", "LLVMBuildStore", "PPP")
F_("P", "LLVMBuildGEP", "PPPIs")
F("P", "LLVMBuildAdd", "PPPs")
F("P", "LLVMBuildSub", "PPPs")
F("P", "LLVMBuildAnd", "PPPs")
F("P", "LLVMBuildOr", "PPPs")
F("P", "LLVMBuildXor", "PPPs")
F("P", "LLVMBuildAShr", "PPPs")
F("P", "LLVMBuildLShr", "PPPs")
F("P", "LLVMBuildShl", "PPPs")
F("P", "LLVMBuildNeg", "PPs")
F_("P", "LLVMBuildCall", "PPPIs")
F("P", "LLVMBuildRet", "PP")
F("P", "LLVMBuildBr", "PP")
F("P", "LLVMBuildCondBr", "PPPP")
# Context methods
F("P", "LLVMGetGlobalContext", "")
# Memory and resource management
F("P", "LLVMCreateMemoryBufferWithMemoryRangeCopy", "PLP")
F("v", "LLVMDisposeMessage", "P")
# Codegeneration functions
F("v", "LLVMInitializeX86TargetInfo", "")
F("v", "LLVMInitializeX86Target", "")
F("v", "LLVMInitializeX86TargetMC", "")
F("v", "LLVMInitializeX86AsmPrinter", "")
F("v", "LLVMInitializeX86AsmParser", "")
F("s", "LLVMGetDefaultTargetTriple", "")
F("i", "LLVMGetTargetFromTriple", "spp")
F("i", "LLVMTargetHasJIT", "P")
F("P", "LLVMCreateTargetMachine", "PsssIII")
F("i", "LLVMCreateExecutionEngineForModule", "pPp")
F("i", "LLVMCreateMCJITCompilerForModule", "pPpLp")
F("v", "LLVMAddModule", "PP")
F("P", "LLVMCreateGenericValueOfInt", "Pqi")
F("P", "LLVMRunFunction", "PPIP")
F("Q", "LLVMGetFunctionAddress", "Ps")
# LLVMOrcMakeSharedModule is removed in LLVM 7 as apparently no longer needed
try:
F("P", "LLVMOrcMakeSharedModule", "P")
except OSError: # ENOENT
LLVMOrcMakeSharedModule = lambda x: x
F("P", "LLVMOrcCreateInstance", "P")
F("i", "LLVMOrcAddEagerlyCompiledIR", "PpPCp")
F("i", "LLVMOrcAddLazilyCompiledIR", "PpPCp")
F("i", "LLVMOrcGetSymbolAddress", "Pps")
def by_ref(type):
if type in ("p", "P", "s"):
type = "L"
return array(type, [0])
def reflist2array(l):
return array("L", l)
# Note: param_count is not accepted as in raw C API
def LLVMFunctionType(return_type, params, var_arg=False):
func_type = LLVMFunctionType_(
return_type, reflist2array(params), len(params), var_arg
)
return func_type
# Note: NumIndices is not accepted as in raw C API
def LLVMBuildGEP(builder, ptr, indices, name=None):
val = LLVMBuildGEP_(
builder, ptr, reflist2array(indices), len(indices), name
)
return val
# Note: NumArgs is not accepted as in raw C API
def LLVMBuildCall(builder, func, args, name=""):
val = LLVMBuildCall_(
builder, func, reflist2array(args), len(args), name
)
return val
def LLVMPrintModuleToString(m):
s = LLVMPrintModuleToString_(m)
# Would need uctypes.str_at(), or alternatively, strlen(). For now just
# use ffi's "s" return type. TODO: Fix memory leak.
#LLVMDisposeMessage(s)
return s
def LLVMParseBitcode2(buf):
mod_ref = by_ref("P")
res = LLVMParseBitcode2_(buf, mod_ref)
assert res == 0
return mod_ref[0]
def LLVMParseIRInContext(ctx, buf):
mod_ref = by_ref("P")
msg_ref = by_ref("s")
res = LLVMParseIRInContext_(ctx, buf, mod_ref, msg_ref)
assert res == 0
return mod_ref[0]