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TargetInfo.h
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TargetInfo.h
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//===--- TargetInfo.h - Expose information about the target -----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Defines the clang::TargetInfo interface.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_BASIC_TARGETINFO_H
#define LLVM_CLANG_BASIC_TARGETINFO_H
#include "clang/Basic/AddressSpaces.h"
#include "clang/Basic/CodeGenOptions.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/Specifiers.h"
#include "clang/Basic/TargetCXXABI.h"
#include "clang/Basic/TargetOptions.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Frontend/OpenMP/OMPGridValues.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/VersionTuple.h"
#include <cassert>
#include <string>
#include <vector>
namespace llvm {
struct fltSemantics;
}
namespace clang {
class DiagnosticsEngine;
class LangOptions;
class CodeGenOptions;
class MacroBuilder;
class QualType;
class SourceLocation;
class SourceManager;
namespace Builtin { struct Info; }
enum class FloatModeKind {
NoFloat = 255,
Float = 0,
Double,
LongDouble,
Float128,
Ibm128
};
/// Fields controlling how types are laid out in memory; these may need to
/// be copied for targets like AMDGPU that base their ABIs on an auxiliary
/// CPU target.
struct TransferrableTargetInfo {
unsigned char PointerWidth, PointerAlign;
unsigned char BoolWidth, BoolAlign;
unsigned char IntWidth, IntAlign;
unsigned char HalfWidth, HalfAlign;
unsigned char BFloat16Width, BFloat16Align;
unsigned char FloatWidth, FloatAlign;
unsigned char DoubleWidth, DoubleAlign;
unsigned char LongDoubleWidth, LongDoubleAlign, Float128Align, Ibm128Align;
unsigned char LargeArrayMinWidth, LargeArrayAlign;
unsigned char LongWidth, LongAlign;
unsigned char LongLongWidth, LongLongAlign;
// Fixed point bit widths
unsigned char ShortAccumWidth, ShortAccumAlign;
unsigned char AccumWidth, AccumAlign;
unsigned char LongAccumWidth, LongAccumAlign;
unsigned char ShortFractWidth, ShortFractAlign;
unsigned char FractWidth, FractAlign;
unsigned char LongFractWidth, LongFractAlign;
// If true, unsigned fixed point types have the same number of fractional bits
// as their signed counterparts, forcing the unsigned types to have one extra
// bit of padding. Otherwise, unsigned fixed point types have
// one more fractional bit than its corresponding signed type. This is false
// by default.
bool PaddingOnUnsignedFixedPoint;
// Fixed point integral and fractional bit sizes
// Saturated types share the same integral/fractional bits as their
// corresponding unsaturated types.
// For simplicity, the fractional bits in a _Fract type will be one less the
// width of that _Fract type. This leaves all signed _Fract types having no
// padding and unsigned _Fract types will only have 1 bit of padding after the
// sign if PaddingOnUnsignedFixedPoint is set.
unsigned char ShortAccumScale;
unsigned char AccumScale;
unsigned char LongAccumScale;
unsigned char SuitableAlign;
unsigned char DefaultAlignForAttributeAligned;
unsigned char MinGlobalAlign;
unsigned short NewAlign;
unsigned MaxVectorAlign;
unsigned MaxTLSAlign;
const llvm::fltSemantics *HalfFormat, *BFloat16Format, *FloatFormat,
*DoubleFormat, *LongDoubleFormat, *Float128Format, *Ibm128Format;
///===---- Target Data Type Query Methods -------------------------------===//
enum IntType {
NoInt = 0,
SignedChar,
UnsignedChar,
SignedShort,
UnsignedShort,
SignedInt,
UnsignedInt,
SignedLong,
UnsignedLong,
SignedLongLong,
UnsignedLongLong
};
protected:
IntType SizeType, IntMaxType, PtrDiffType, IntPtrType, WCharType, WIntType,
Char16Type, Char32Type, Int64Type, Int16Type, SigAtomicType,
ProcessIDType;
/// Whether Objective-C's built-in boolean type should be signed char.
///
/// Otherwise, when this flag is not set, the normal built-in boolean type is
/// used.
unsigned UseSignedCharForObjCBool : 1;
/// Control whether the alignment of bit-field types is respected when laying
/// out structures. If true, then the alignment of the bit-field type will be
/// used to (a) impact the alignment of the containing structure, and (b)
/// ensure that the individual bit-field will not straddle an alignment
/// boundary.
unsigned UseBitFieldTypeAlignment : 1;
/// Whether zero length bitfields (e.g., int : 0;) force alignment of
/// the next bitfield.
///
/// If the alignment of the zero length bitfield is greater than the member
/// that follows it, `bar', `bar' will be aligned as the type of the
/// zero-length bitfield.
unsigned UseZeroLengthBitfieldAlignment : 1;
/// Whether zero length bitfield alignment is respected if they are the
/// leading members.
unsigned UseLeadingZeroLengthBitfield : 1;
/// Whether explicit bit field alignment attributes are honored.
unsigned UseExplicitBitFieldAlignment : 1;
/// If non-zero, specifies a fixed alignment value for bitfields that follow
/// zero length bitfield, regardless of the zero length bitfield type.
unsigned ZeroLengthBitfieldBoundary;
/// If non-zero, specifies a maximum alignment to truncate alignment
/// specified in the aligned attribute of a static variable to this value.
unsigned MaxAlignedAttribute;
};
/// OpenCL type kinds.
enum OpenCLTypeKind : uint8_t {
OCLTK_Default,
OCLTK_ClkEvent,
OCLTK_Event,
OCLTK_Image,
OCLTK_Pipe,
OCLTK_Queue,
OCLTK_ReserveID,
OCLTK_Sampler,
};
/// Exposes information about the current target.
///
class TargetInfo : public virtual TransferrableTargetInfo,
public RefCountedBase<TargetInfo> {
std::shared_ptr<TargetOptions> TargetOpts;
llvm::Triple Triple;
protected:
// Target values set by the ctor of the actual target implementation. Default
// values are specified by the TargetInfo constructor.
bool BigEndian;
bool TLSSupported;
bool VLASupported;
bool NoAsmVariants; // True if {|} are normal characters.
bool HasLegalHalfType; // True if the backend supports operations on the half
// LLVM IR type.
bool HasFloat128;
bool HasFloat16;
bool HasBFloat16;
bool HasIbm128;
bool HasLongDouble;
bool HasFPReturn;
bool HasStrictFP;
unsigned char MaxAtomicPromoteWidth, MaxAtomicInlineWidth;
unsigned short SimdDefaultAlign;
std::string DataLayoutString;
const char *UserLabelPrefix;
const char *MCountName;
unsigned char RegParmMax, SSERegParmMax;
TargetCXXABI TheCXXABI;
const LangASMap *AddrSpaceMap;
mutable StringRef PlatformName;
mutable VersionTuple PlatformMinVersion;
unsigned HasAlignMac68kSupport : 1;
unsigned RealTypeUsesObjCFPRet : 3;
unsigned ComplexLongDoubleUsesFP2Ret : 1;
unsigned HasBuiltinMSVaList : 1;
unsigned IsRenderScriptTarget : 1;
unsigned HasAArch64SVETypes : 1;
unsigned HasRISCVVTypes : 1;
unsigned AllowAMDGPUUnsafeFPAtomics : 1;
unsigned ARMCDECoprocMask : 8;
unsigned MaxOpenCLWorkGroupSize;
// TargetInfo Constructor. Default initializes all fields.
TargetInfo(const llvm::Triple &T);
// UserLabelPrefix must match DL's getGlobalPrefix() when interpreted
// as a DataLayout object.
void resetDataLayout(StringRef DL, const char *UserLabelPrefix = "");
public:
/// Construct a target for the given options.
///
/// \param Opts - The options to use to initialize the target. The target may
/// modify the options to canonicalize the target feature information to match
/// what the backend expects.
static TargetInfo *
CreateTargetInfo(DiagnosticsEngine &Diags,
const std::shared_ptr<TargetOptions> &Opts);
virtual ~TargetInfo();
/// Retrieve the target options.
TargetOptions &getTargetOpts() const {
assert(TargetOpts && "Missing target options");
return *TargetOpts;
}
/// The different kinds of __builtin_va_list types defined by
/// the target implementation.
enum BuiltinVaListKind {
/// typedef char* __builtin_va_list;
CharPtrBuiltinVaList = 0,
/// typedef void* __builtin_va_list;
VoidPtrBuiltinVaList,
/// __builtin_va_list as defined by the AArch64 ABI
/// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055a/IHI0055A_aapcs64.pdf
AArch64ABIBuiltinVaList,
/// __builtin_va_list as defined by the PNaCl ABI:
/// http://www.chromium.org/nativeclient/pnacl/bitcode-abi#TOC-Machine-Types
PNaClABIBuiltinVaList,
/// __builtin_va_list as defined by the Power ABI:
/// https://www.power.org
/// /resources/downloads/Power-Arch-32-bit-ABI-supp-1.0-Embedded.pdf
PowerABIBuiltinVaList,
/// __builtin_va_list as defined by the x86-64 ABI:
/// http://refspecs.linuxbase.org/elf/x86_64-abi-0.21.pdf
X86_64ABIBuiltinVaList,
/// __builtin_va_list as defined by ARM AAPCS ABI
/// http://infocenter.arm.com
// /help/topic/com.arm.doc.ihi0042d/IHI0042D_aapcs.pdf
AAPCSABIBuiltinVaList,
// typedef struct __va_list_tag
// {
// long __gpr;
// long __fpr;
// void *__overflow_arg_area;
// void *__reg_save_area;
// } va_list[1];
SystemZBuiltinVaList,
// typedef struct __va_list_tag {
// void *__current_saved_reg_area_pointer;
// void *__saved_reg_area_end_pointer;
// void *__overflow_area_pointer;
//} va_list;
HexagonBuiltinVaList
};
protected:
/// Specify if mangling based on address space map should be used or
/// not for language specific address spaces
bool UseAddrSpaceMapMangling;
public:
IntType getSizeType() const { return SizeType; }
IntType getSignedSizeType() const {
switch (SizeType) {
case UnsignedShort:
return SignedShort;
case UnsignedInt:
return SignedInt;
case UnsignedLong:
return SignedLong;
case UnsignedLongLong:
return SignedLongLong;
default:
llvm_unreachable("Invalid SizeType");
}
}
IntType getIntMaxType() const { return IntMaxType; }
IntType getUIntMaxType() const {
return getCorrespondingUnsignedType(IntMaxType);
}
IntType getPtrDiffType(unsigned AddrSpace) const {
return AddrSpace == 0 ? PtrDiffType : getPtrDiffTypeV(AddrSpace);
}
IntType getUnsignedPtrDiffType(unsigned AddrSpace) const {
return getCorrespondingUnsignedType(getPtrDiffType(AddrSpace));
}
IntType getIntPtrType() const { return IntPtrType; }
IntType getUIntPtrType() const {
return getCorrespondingUnsignedType(IntPtrType);
}
IntType getWCharType() const { return WCharType; }
IntType getWIntType() const { return WIntType; }
IntType getChar16Type() const { return Char16Type; }
IntType getChar32Type() const { return Char32Type; }
IntType getInt64Type() const { return Int64Type; }
IntType getUInt64Type() const {
return getCorrespondingUnsignedType(Int64Type);
}
IntType getInt16Type() const { return Int16Type; }
IntType getUInt16Type() const {
return getCorrespondingUnsignedType(Int16Type);
}
IntType getSigAtomicType() const { return SigAtomicType; }
IntType getProcessIDType() const { return ProcessIDType; }
static IntType getCorrespondingUnsignedType(IntType T) {
switch (T) {
case SignedChar:
return UnsignedChar;
case SignedShort:
return UnsignedShort;
case SignedInt:
return UnsignedInt;
case SignedLong:
return UnsignedLong;
case SignedLongLong:
return UnsignedLongLong;
default:
llvm_unreachable("Unexpected signed integer type");
}
}
/// In the event this target uses the same number of fractional bits for its
/// unsigned types as it does with its signed counterparts, there will be
/// exactly one bit of padding.
/// Return true if unsigned fixed point types have padding for this target.
bool doUnsignedFixedPointTypesHavePadding() const {
return PaddingOnUnsignedFixedPoint;
}
/// Return the width (in bits) of the specified integer type enum.
///
/// For example, SignedInt -> getIntWidth().
unsigned getTypeWidth(IntType T) const;
/// Return integer type with specified width.
virtual IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const;
/// Return the smallest integer type with at least the specified width.
virtual IntType getLeastIntTypeByWidth(unsigned BitWidth,
bool IsSigned) const;
/// Return floating point type with specified width. On PPC, there are
/// three possible types for 128-bit floating point: "PPC double-double",
/// IEEE 754R quad precision, and "long double" (which under the covers
/// is represented as one of those two). At this time, there is no support
/// for an explicit "PPC double-double" type (i.e. __ibm128) so we only
/// need to differentiate between "long double" and IEEE quad precision.
FloatModeKind getRealTypeByWidth(unsigned BitWidth,
FloatModeKind ExplicitType) const;
/// Return the alignment (in bits) of the specified integer type enum.
///
/// For example, SignedInt -> getIntAlign().
unsigned getTypeAlign(IntType T) const;
/// Returns true if the type is signed; false otherwise.
static bool isTypeSigned(IntType T);
/// Return the width of pointers on this target, for the
/// specified address space.
uint64_t getPointerWidth(unsigned AddrSpace) const {
return AddrSpace == 0 ? PointerWidth : getPointerWidthV(AddrSpace);
}
uint64_t getPointerAlign(unsigned AddrSpace) const {
return AddrSpace == 0 ? PointerAlign : getPointerAlignV(AddrSpace);
}
/// Return the maximum width of pointers on this target.
virtual uint64_t getMaxPointerWidth() const {
return PointerWidth;
}
/// Get integer value for null pointer.
/// \param AddrSpace address space of pointee in source language.
virtual uint64_t getNullPointerValue(LangAS AddrSpace) const { return 0; }
/// Return the size of '_Bool' and C++ 'bool' for this target, in bits.
unsigned getBoolWidth() const { return BoolWidth; }
/// Return the alignment of '_Bool' and C++ 'bool' for this target.
unsigned getBoolAlign() const { return BoolAlign; }
unsigned getCharWidth() const { return 8; } // FIXME
unsigned getCharAlign() const { return 8; } // FIXME
/// Return the size of 'signed short' and 'unsigned short' for this
/// target, in bits.
unsigned getShortWidth() const { return 16; } // FIXME
/// Return the alignment of 'signed short' and 'unsigned short' for
/// this target.
unsigned getShortAlign() const { return 16; } // FIXME
/// getIntWidth/Align - Return the size of 'signed int' and 'unsigned int' for
/// this target, in bits.
unsigned getIntWidth() const { return IntWidth; }
unsigned getIntAlign() const { return IntAlign; }
/// getLongWidth/Align - Return the size of 'signed long' and 'unsigned long'
/// for this target, in bits.
unsigned getLongWidth() const { return LongWidth; }
unsigned getLongAlign() const { return LongAlign; }
/// getLongLongWidth/Align - Return the size of 'signed long long' and
/// 'unsigned long long' for this target, in bits.
unsigned getLongLongWidth() const { return LongLongWidth; }
unsigned getLongLongAlign() const { return LongLongAlign; }
/// getShortAccumWidth/Align - Return the size of 'signed short _Accum' and
/// 'unsigned short _Accum' for this target, in bits.
unsigned getShortAccumWidth() const { return ShortAccumWidth; }
unsigned getShortAccumAlign() const { return ShortAccumAlign; }
/// getAccumWidth/Align - Return the size of 'signed _Accum' and
/// 'unsigned _Accum' for this target, in bits.
unsigned getAccumWidth() const { return AccumWidth; }
unsigned getAccumAlign() const { return AccumAlign; }
/// getLongAccumWidth/Align - Return the size of 'signed long _Accum' and
/// 'unsigned long _Accum' for this target, in bits.
unsigned getLongAccumWidth() const { return LongAccumWidth; }
unsigned getLongAccumAlign() const { return LongAccumAlign; }
/// getShortFractWidth/Align - Return the size of 'signed short _Fract' and
/// 'unsigned short _Fract' for this target, in bits.
unsigned getShortFractWidth() const { return ShortFractWidth; }
unsigned getShortFractAlign() const { return ShortFractAlign; }
/// getFractWidth/Align - Return the size of 'signed _Fract' and
/// 'unsigned _Fract' for this target, in bits.
unsigned getFractWidth() const { return FractWidth; }
unsigned getFractAlign() const { return FractAlign; }
/// getLongFractWidth/Align - Return the size of 'signed long _Fract' and
/// 'unsigned long _Fract' for this target, in bits.
unsigned getLongFractWidth() const { return LongFractWidth; }
unsigned getLongFractAlign() const { return LongFractAlign; }
/// getShortAccumScale/IBits - Return the number of fractional/integral bits
/// in a 'signed short _Accum' type.
unsigned getShortAccumScale() const { return ShortAccumScale; }
unsigned getShortAccumIBits() const {
return ShortAccumWidth - ShortAccumScale - 1;
}
/// getAccumScale/IBits - Return the number of fractional/integral bits
/// in a 'signed _Accum' type.
unsigned getAccumScale() const { return AccumScale; }
unsigned getAccumIBits() const { return AccumWidth - AccumScale - 1; }
/// getLongAccumScale/IBits - Return the number of fractional/integral bits
/// in a 'signed long _Accum' type.
unsigned getLongAccumScale() const { return LongAccumScale; }
unsigned getLongAccumIBits() const {
return LongAccumWidth - LongAccumScale - 1;
}
/// getUnsignedShortAccumScale/IBits - Return the number of
/// fractional/integral bits in a 'unsigned short _Accum' type.
unsigned getUnsignedShortAccumScale() const {
return PaddingOnUnsignedFixedPoint ? ShortAccumScale : ShortAccumScale + 1;
}
unsigned getUnsignedShortAccumIBits() const {
return PaddingOnUnsignedFixedPoint
? getShortAccumIBits()
: ShortAccumWidth - getUnsignedShortAccumScale();
}
/// getUnsignedAccumScale/IBits - Return the number of fractional/integral
/// bits in a 'unsigned _Accum' type.
unsigned getUnsignedAccumScale() const {
return PaddingOnUnsignedFixedPoint ? AccumScale : AccumScale + 1;
}
unsigned getUnsignedAccumIBits() const {
return PaddingOnUnsignedFixedPoint ? getAccumIBits()
: AccumWidth - getUnsignedAccumScale();
}
/// getUnsignedLongAccumScale/IBits - Return the number of fractional/integral
/// bits in a 'unsigned long _Accum' type.
unsigned getUnsignedLongAccumScale() const {
return PaddingOnUnsignedFixedPoint ? LongAccumScale : LongAccumScale + 1;
}
unsigned getUnsignedLongAccumIBits() const {
return PaddingOnUnsignedFixedPoint
? getLongAccumIBits()
: LongAccumWidth - getUnsignedLongAccumScale();
}
/// getShortFractScale - Return the number of fractional bits
/// in a 'signed short _Fract' type.
unsigned getShortFractScale() const { return ShortFractWidth - 1; }
/// getFractScale - Return the number of fractional bits
/// in a 'signed _Fract' type.
unsigned getFractScale() const { return FractWidth - 1; }
/// getLongFractScale - Return the number of fractional bits
/// in a 'signed long _Fract' type.
unsigned getLongFractScale() const { return LongFractWidth - 1; }
/// getUnsignedShortFractScale - Return the number of fractional bits
/// in a 'unsigned short _Fract' type.
unsigned getUnsignedShortFractScale() const {
return PaddingOnUnsignedFixedPoint ? getShortFractScale()
: getShortFractScale() + 1;
}
/// getUnsignedFractScale - Return the number of fractional bits
/// in a 'unsigned _Fract' type.
unsigned getUnsignedFractScale() const {
return PaddingOnUnsignedFixedPoint ? getFractScale() : getFractScale() + 1;
}
/// getUnsignedLongFractScale - Return the number of fractional bits
/// in a 'unsigned long _Fract' type.
unsigned getUnsignedLongFractScale() const {
return PaddingOnUnsignedFixedPoint ? getLongFractScale()
: getLongFractScale() + 1;
}
/// Determine whether the __int128 type is supported on this target.
virtual bool hasInt128Type() const {
return (getPointerWidth(0) >= 64) || getTargetOpts().ForceEnableInt128;
} // FIXME
/// Determine whether the _BitInt type is supported on this target. This
/// limitation is put into place for ABI reasons.
/// FIXME: _BitInt is a required type in C23, so there's not much utility in
/// asking whether the target supported it or not; I think this should be
/// removed once backends have been alerted to the type and have had the
/// chance to do implementation work if needed.
virtual bool hasBitIntType() const {
return false;
}
/// Determine whether _Float16 is supported on this target.
virtual bool hasLegalHalfType() const { return HasLegalHalfType; }
/// Determine whether the __float128 type is supported on this target.
virtual bool hasFloat128Type() const { return HasFloat128; }
/// Determine whether the _Float16 type is supported on this target.
virtual bool hasFloat16Type() const { return HasFloat16; }
/// Determine whether the _BFloat16 type is supported on this target.
virtual bool hasBFloat16Type() const { return HasBFloat16; }
/// Determine whether the __ibm128 type is supported on this target.
virtual bool hasIbm128Type() const { return HasIbm128; }
/// Determine whether the long double type is supported on this target.
virtual bool hasLongDoubleType() const { return HasLongDouble; }
/// Determine whether return of a floating point value is supported
/// on this target.
virtual bool hasFPReturn() const { return HasFPReturn; }
/// Determine whether constrained floating point is supported on this target.
virtual bool hasStrictFP() const { return HasStrictFP; }
/// Return the alignment that is the largest alignment ever used for any
/// scalar/SIMD data type on the target machine you are compiling for
/// (including types with an extended alignment requirement).
unsigned getSuitableAlign() const { return SuitableAlign; }
/// Return the default alignment for __attribute__((aligned)) on
/// this target, to be used if no alignment value is specified.
unsigned getDefaultAlignForAttributeAligned() const {
return DefaultAlignForAttributeAligned;
}
/// getMinGlobalAlign - Return the minimum alignment of a global variable,
/// unless its alignment is explicitly reduced via attributes.
virtual unsigned getMinGlobalAlign (uint64_t) const {
return MinGlobalAlign;
}
/// Return the largest alignment for which a suitably-sized allocation with
/// '::operator new(size_t)' or 'malloc' is guaranteed to produce a
/// correctly-aligned pointer.
unsigned getNewAlign() const {
return NewAlign ? NewAlign : std::max(LongDoubleAlign, LongLongAlign);
}
/// getWCharWidth/Align - Return the size of 'wchar_t' for this target, in
/// bits.
unsigned getWCharWidth() const { return getTypeWidth(WCharType); }
unsigned getWCharAlign() const { return getTypeAlign(WCharType); }
/// getChar16Width/Align - Return the size of 'char16_t' for this target, in
/// bits.
unsigned getChar16Width() const { return getTypeWidth(Char16Type); }
unsigned getChar16Align() const { return getTypeAlign(Char16Type); }
/// getChar32Width/Align - Return the size of 'char32_t' for this target, in
/// bits.
unsigned getChar32Width() const { return getTypeWidth(Char32Type); }
unsigned getChar32Align() const { return getTypeAlign(Char32Type); }
/// getHalfWidth/Align/Format - Return the size/align/format of 'half'.
unsigned getHalfWidth() const { return HalfWidth; }
unsigned getHalfAlign() const { return HalfAlign; }
const llvm::fltSemantics &getHalfFormat() const { return *HalfFormat; }
/// getFloatWidth/Align/Format - Return the size/align/format of 'float'.
unsigned getFloatWidth() const { return FloatWidth; }
unsigned getFloatAlign() const { return FloatAlign; }
const llvm::fltSemantics &getFloatFormat() const { return *FloatFormat; }
/// getBFloat16Width/Align/Format - Return the size/align/format of '__bf16'.
unsigned getBFloat16Width() const { return BFloat16Width; }
unsigned getBFloat16Align() const { return BFloat16Align; }
const llvm::fltSemantics &getBFloat16Format() const { return *BFloat16Format; }
/// getDoubleWidth/Align/Format - Return the size/align/format of 'double'.
unsigned getDoubleWidth() const { return DoubleWidth; }
unsigned getDoubleAlign() const { return DoubleAlign; }
const llvm::fltSemantics &getDoubleFormat() const { return *DoubleFormat; }
/// getLongDoubleWidth/Align/Format - Return the size/align/format of 'long
/// double'.
unsigned getLongDoubleWidth() const { return LongDoubleWidth; }
unsigned getLongDoubleAlign() const { return LongDoubleAlign; }
const llvm::fltSemantics &getLongDoubleFormat() const {
return *LongDoubleFormat;
}
/// getFloat128Width/Align/Format - Return the size/align/format of
/// '__float128'.
unsigned getFloat128Width() const { return 128; }
unsigned getFloat128Align() const { return Float128Align; }
const llvm::fltSemantics &getFloat128Format() const {
return *Float128Format;
}
/// getIbm128Width/Align/Format - Return the size/align/format of
/// '__ibm128'.
unsigned getIbm128Width() const { return 128; }
unsigned getIbm128Align() const { return Ibm128Align; }
const llvm::fltSemantics &getIbm128Format() const { return *Ibm128Format; }
/// Return the mangled code of long double.
virtual const char *getLongDoubleMangling() const { return "e"; }
/// Return the mangled code of __float128.
virtual const char *getFloat128Mangling() const { return "g"; }
/// Return the mangled code of __ibm128.
virtual const char *getIbm128Mangling() const {
llvm_unreachable("ibm128 not implemented on this target");
}
/// Return the mangled code of bfloat.
virtual const char *getBFloat16Mangling() const {
llvm_unreachable("bfloat not implemented on this target");
}
/// Return the value for the C99 FLT_EVAL_METHOD macro.
virtual unsigned getFloatEvalMethod() const { return 0; }
// getLargeArrayMinWidth/Align - Return the minimum array size that is
// 'large' and its alignment.
unsigned getLargeArrayMinWidth() const { return LargeArrayMinWidth; }
unsigned getLargeArrayAlign() const { return LargeArrayAlign; }
/// Return the maximum width lock-free atomic operation which will
/// ever be supported for the given target
unsigned getMaxAtomicPromoteWidth() const { return MaxAtomicPromoteWidth; }
/// Return the maximum width lock-free atomic operation which can be
/// inlined given the supported features of the given target.
unsigned getMaxAtomicInlineWidth() const { return MaxAtomicInlineWidth; }
/// Set the maximum inline or promote width lock-free atomic operation
/// for the given target.
virtual void setMaxAtomicWidth() {}
/// Returns true if the given target supports lock-free atomic
/// operations at the specified width and alignment.
virtual bool hasBuiltinAtomic(uint64_t AtomicSizeInBits,
uint64_t AlignmentInBits) const {
return AtomicSizeInBits <= AlignmentInBits &&
AtomicSizeInBits <= getMaxAtomicInlineWidth() &&
(AtomicSizeInBits <= getCharWidth() ||
llvm::isPowerOf2_64(AtomicSizeInBits / getCharWidth()));
}
/// Return the maximum vector alignment supported for the given target.
unsigned getMaxVectorAlign() const { return MaxVectorAlign; }
/// Return default simd alignment for the given target. Generally, this
/// value is type-specific, but this alignment can be used for most of the
/// types for the given target.
unsigned getSimdDefaultAlign() const { return SimdDefaultAlign; }
unsigned getMaxOpenCLWorkGroupSize() const { return MaxOpenCLWorkGroupSize; }
/// Return the alignment (in bits) of the thrown exception object. This is
/// only meaningful for targets that allocate C++ exceptions in a system
/// runtime, such as those using the Itanium C++ ABI.
virtual unsigned getExnObjectAlignment() const {
// Itanium says that an _Unwind_Exception has to be "double-word"
// aligned (and thus the end of it is also so-aligned), meaning 16
// bytes. Of course, that was written for the actual Itanium,
// which is a 64-bit platform. Classically, the ABI doesn't really
// specify the alignment on other platforms, but in practice
// libUnwind declares the struct with __attribute__((aligned)), so
// we assume that alignment here. (It's generally 16 bytes, but
// some targets overwrite it.)
return getDefaultAlignForAttributeAligned();
}
/// Return the size of intmax_t and uintmax_t for this target, in bits.
unsigned getIntMaxTWidth() const {
return getTypeWidth(IntMaxType);
}
// Return the size of unwind_word for this target.
virtual unsigned getUnwindWordWidth() const { return getPointerWidth(0); }
/// Return the "preferred" register width on this target.
virtual unsigned getRegisterWidth() const {
// Currently we assume the register width on the target matches the pointer
// width, we can introduce a new variable for this if/when some target wants
// it.
return PointerWidth;
}
/// \brief Returns the default value of the __USER_LABEL_PREFIX__ macro,
/// which is the prefix given to user symbols by default.
///
/// On most platforms this is "", but it is "_" on some.
const char *getUserLabelPrefix() const { return UserLabelPrefix; }
/// Returns the name of the mcount instrumentation function.
const char *getMCountName() const {
return MCountName;
}
/// Check if the Objective-C built-in boolean type should be signed
/// char.
///
/// Otherwise, if this returns false, the normal built-in boolean type
/// should also be used for Objective-C.
bool useSignedCharForObjCBool() const {
return UseSignedCharForObjCBool;
}
void noSignedCharForObjCBool() {
UseSignedCharForObjCBool = false;
}
/// Check whether the alignment of bit-field types is respected
/// when laying out structures.
bool useBitFieldTypeAlignment() const {
return UseBitFieldTypeAlignment;
}
/// Check whether zero length bitfields should force alignment of
/// the next member.
bool useZeroLengthBitfieldAlignment() const {
return UseZeroLengthBitfieldAlignment;
}
/// Check whether zero length bitfield alignment is respected if they are
/// leading members.
bool useLeadingZeroLengthBitfield() const {
return UseLeadingZeroLengthBitfield;
}
/// Get the fixed alignment value in bits for a member that follows
/// a zero length bitfield.
unsigned getZeroLengthBitfieldBoundary() const {
return ZeroLengthBitfieldBoundary;
}
/// Get the maximum alignment in bits for a static variable with
/// aligned attribute.
unsigned getMaxAlignedAttribute() const { return MaxAlignedAttribute; }
/// Check whether explicit bitfield alignment attributes should be
// honored, as in "__attribute__((aligned(2))) int b : 1;".
bool useExplicitBitFieldAlignment() const {
return UseExplicitBitFieldAlignment;
}
/// Check whether this target support '\#pragma options align=mac68k'.
bool hasAlignMac68kSupport() const {
return HasAlignMac68kSupport;
}
/// Return the user string for the specified integer type enum.
///
/// For example, SignedShort -> "short".
static const char *getTypeName(IntType T);
/// Return the constant suffix for the specified integer type enum.
///
/// For example, SignedLong -> "L".
const char *getTypeConstantSuffix(IntType T) const;
/// Return the printf format modifier for the specified
/// integer type enum.
///
/// For example, SignedLong -> "l".
static const char *getTypeFormatModifier(IntType T);
/// Check whether the given real type should use the "fpret" flavor of
/// Objective-C message passing on this target.
bool useObjCFPRetForRealType(FloatModeKind T) const {
return RealTypeUsesObjCFPRet & (1 << (int)T);
}
/// Check whether _Complex long double should use the "fp2ret" flavor
/// of Objective-C message passing on this target.
bool useObjCFP2RetForComplexLongDouble() const {
return ComplexLongDoubleUsesFP2Ret;
}
/// Check whether llvm intrinsics such as llvm.convert.to.fp16 should be used
/// to convert to and from __fp16.
/// FIXME: This function should be removed once all targets stop using the
/// conversion intrinsics.
virtual bool useFP16ConversionIntrinsics() const {
return true;
}
/// Specify if mangling based on address space map should be used or
/// not for language specific address spaces
bool useAddressSpaceMapMangling() const {
return UseAddrSpaceMapMangling;
}
///===---- Other target property query methods --------------------------===//
/// Appends the target-specific \#define values for this
/// target set to the specified buffer.
virtual void getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const = 0;
/// Return information about target-specific builtins for
/// the current primary target, and info about which builtins are non-portable
/// across the current set of primary and secondary targets.
virtual ArrayRef<Builtin::Info> getTargetBuiltins() const = 0;
/// Returns target-specific min and max values VScale_Range.
virtual Optional<std::pair<unsigned, unsigned>>
getVScaleRange(const LangOptions &LangOpts) const {
return None;
}
/// The __builtin_clz* and __builtin_ctz* built-in
/// functions are specified to have undefined results for zero inputs, but
/// on targets that support these operations in a way that provides
/// well-defined results for zero without loss of performance, it is a good
/// idea to avoid optimizing based on that undef behavior.
virtual bool isCLZForZeroUndef() const { return true; }
/// Returns the kind of __builtin_va_list type that should be used
/// with this target.
virtual BuiltinVaListKind getBuiltinVaListKind() const = 0;
/// Returns whether or not type \c __builtin_ms_va_list type is
/// available on this target.
bool hasBuiltinMSVaList() const { return HasBuiltinMSVaList; }
/// Returns true for RenderScript.
bool isRenderScriptTarget() const { return IsRenderScriptTarget; }
/// Returns whether or not the AArch64 SVE built-in types are
/// available on this target.
bool hasAArch64SVETypes() const { return HasAArch64SVETypes; }
/// Returns whether or not the RISC-V V built-in types are
/// available on this target.
bool hasRISCVVTypes() const { return HasRISCVVTypes; }
/// Returns whether or not the AMDGPU unsafe floating point atomics are
/// allowed.
bool allowAMDGPUUnsafeFPAtomics() const { return AllowAMDGPUUnsafeFPAtomics; }
/// For ARM targets returns a mask defining which coprocessors are configured
/// as Custom Datapath.
uint32_t getARMCDECoprocMask() const { return ARMCDECoprocMask; }
/// Returns whether the passed in string is a valid clobber in an
/// inline asm statement.
///
/// This is used by Sema.
bool isValidClobber(StringRef Name) const;
/// Returns whether the passed in string is a valid register name
/// according to GCC.
///
/// This is used by Sema for inline asm statements.
virtual bool isValidGCCRegisterName(StringRef Name) const;
/// Returns the "normalized" GCC register name.
///
/// ReturnCannonical true will return the register name without any additions
/// such as "{}" or "%" in it's canonical form, for example:
/// ReturnCanonical = true and Name = "rax", will return "ax".
StringRef getNormalizedGCCRegisterName(StringRef Name,
bool ReturnCanonical = false) const;
virtual bool isSPRegName(StringRef) const { return false; }
/// Extracts a register from the passed constraint (if it is a
/// single-register constraint) and the asm label expression related to a
/// variable in the input or output list of an inline asm statement.
///
/// This function is used by Sema in order to diagnose conflicts between
/// the clobber list and the input/output lists.
virtual StringRef getConstraintRegister(StringRef Constraint,
StringRef Expression) const {
return "";
}
struct ConstraintInfo {
enum {
CI_None = 0x00,
CI_AllowsMemory = 0x01,
CI_AllowsRegister = 0x02,
CI_ReadWrite = 0x04, // "+r" output constraint (read and write).
CI_HasMatchingInput = 0x08, // This output operand has a matching input.
CI_ImmediateConstant = 0x10, // This operand must be an immediate constant
CI_EarlyClobber = 0x20, // "&" output constraint (early clobber).
};
unsigned Flags;
int TiedOperand;
struct {
int Min;
int Max;
bool isConstrained;
} ImmRange;
llvm::SmallSet<int, 4> ImmSet;
std::string ConstraintStr; // constraint: "=rm"
std::string Name; // Operand name: [foo] with no []'s.
public:
ConstraintInfo(StringRef ConstraintStr, StringRef Name)
: Flags(0), TiedOperand(-1), ConstraintStr(ConstraintStr.str()),
Name(Name.str()) {
ImmRange.Min = ImmRange.Max = 0;
ImmRange.isConstrained = false;
}