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Showing content from https://clang.llvm.org/doxygen/PatternInit_8cpp_source.html below:

clang: lib/CodeGen/PatternInit.cpp Source File

12#include "llvm/IR/Constant.h" 13#include "llvm/IR/Type.h" 24 const

uint64_t IntValue =

26

? 0xFFFFFFFFFFFFFFFFull

27

: 0xAAAAAAAAAAAAAAAAull;

34 constexpr bool

NegativeNaN =

true

;

35 constexpr

uint64_t NaNPayload = 0xFFFFFFFFFFFFFFFFull;

36 if

(Ty->isIntOrIntVectorTy()) {

38

cast<llvm::IntegerType>(Ty->getScalarType())->getBitWidth();

40 return

llvm::ConstantInt::get(Ty, IntValue);

41 return

llvm::ConstantInt::get(

42

Ty, llvm::APInt::getSplat(BitWidth, llvm::APInt(64, IntValue)));

44 if

(Ty->isPtrOrPtrVectorTy()) {

45 auto

*PtrTy = cast<llvm::PointerType>(Ty->getScalarType());

47

CGM.

getDataLayout

().getPointerSizeInBits(PtrTy->getAddressSpace());

49

llvm_unreachable(

"pattern initialization of unsupported pointer width"

);

50

llvm::Type *IntTy = llvm::IntegerType::get(CGM.

getLLVMContext

(), PtrWidth);

51 auto

*Int = llvm::ConstantInt::get(IntTy, IntValue);

52 return

llvm::ConstantExpr::getIntToPtr(Int, PtrTy);

54 if

(Ty->isFPOrFPVectorTy()) {

55 unsigned

BitWidth = llvm::APFloat::semanticsSizeInBits(

56

Ty->getScalarType()->getFltSemantics());

57

llvm::APInt Payload(64, NaNPayload);

59

Payload = llvm::APInt::getSplat(BitWidth, Payload);

60 return

llvm::ConstantFP::getQNaN(Ty, NegativeNaN, &Payload);

62 if

(Ty->isArrayTy()) {

65 auto

*ArrTy = cast<llvm::ArrayType>(Ty);

67

ArrTy->getNumElements(),

69 return

llvm::ConstantArray::get(ArrTy, Element);

78 auto

*StructTy = cast<llvm::StructType>(Ty);

80 for

(

unsigned

El = 0; El != Struct.size(); ++El)

82 return

llvm::ConstantStruct::get(StructTy, Struct);

const TargetInfo & getTargetInfo() const

This class organizes the cross-function state that is used while generating LLVM code.

const llvm::DataLayout & getDataLayout() const

ASTContext & getContext() const

llvm::LLVMContext & getLLVMContext()

virtual uint64_t getMaxPointerWidth() const

Return the maximum width of pointers on this target.

Defines the clang::TargetInfo interface.

llvm::Constant * initializationPatternFor(CodeGenModule &, llvm::Type *)

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