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Diffstat (limited to 'contrib/llvm/lib/Transforms/Utils/BuildLibCalls.cpp')
| -rw-r--r-- | contrib/llvm/lib/Transforms/Utils/BuildLibCalls.cpp | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Transforms/Utils/BuildLibCalls.cpp b/contrib/llvm/lib/Transforms/Utils/BuildLibCalls.cpp new file mode 100644 index 0000000..8aa7b2a --- /dev/null +++ b/contrib/llvm/lib/Transforms/Utils/BuildLibCalls.cpp @@ -0,0 +1,459 @@ +//===- BuildLibCalls.cpp - Utility builder for libcalls -------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements some functions that will create standard C libcalls. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Transforms/Utils/BuildLibCalls.h" +#include "llvm/ADT/SmallString.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/IRBuilder.h" +#include "llvm/IR/Intrinsics.h" +#include "llvm/IR/LLVMContext.h" +#include "llvm/IR/Module.h" +#include "llvm/IR/Type.h" +#include "llvm/Analysis/TargetLibraryInfo.h" + +using namespace llvm; + +/// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*. +Value *llvm::CastToCStr(Value *V, IRBuilder<> &B) { + unsigned AS = V->getType()->getPointerAddressSpace(); + return B.CreateBitCast(V, B.getInt8PtrTy(AS), "cstr"); +} + +/// EmitStrLen - Emit a call to the strlen function to the builder, for the +/// specified pointer. This always returns an integer value of size intptr_t. +Value *llvm::EmitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout &DL, + const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::strlen)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[2]; + AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture); + Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind }; + AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, AVs); + + LLVMContext &Context = B.GetInsertBlock()->getContext(); + Constant *StrLen = M->getOrInsertFunction( + "strlen", AttributeSet::get(M->getContext(), AS), + DL.getIntPtrType(Context), B.getInt8PtrTy(), nullptr); + CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen"); + if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + + return CI; +} + +/// EmitStrNLen - Emit a call to the strnlen function to the builder, for the +/// specified pointer. Ptr is required to be some pointer type, MaxLen must +/// be of size_t type, and the return value has 'intptr_t' type. +Value *llvm::EmitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B, + const DataLayout &DL, const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::strnlen)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[2]; + AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture); + Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind }; + AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, AVs); + + LLVMContext &Context = B.GetInsertBlock()->getContext(); + Constant *StrNLen = + M->getOrInsertFunction("strnlen", AttributeSet::get(M->getContext(), AS), + DL.getIntPtrType(Context), B.getInt8PtrTy(), + DL.getIntPtrType(Context), nullptr); + CallInst *CI = B.CreateCall(StrNLen, {CastToCStr(Ptr, B), MaxLen}, "strnlen"); + if (const Function *F = dyn_cast<Function>(StrNLen->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + + return CI; +} + +/// EmitStrChr - Emit a call to the strchr function to the builder, for the +/// specified pointer and character. Ptr is required to be some pointer type, +/// and the return value has 'i8*' type. +Value *llvm::EmitStrChr(Value *Ptr, char C, IRBuilder<> &B, + const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::strchr)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind }; + AttributeSet AS = + AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, AVs); + + Type *I8Ptr = B.getInt8PtrTy(); + Type *I32Ty = B.getInt32Ty(); + Constant *StrChr = M->getOrInsertFunction("strchr", + AttributeSet::get(M->getContext(), + AS), + I8Ptr, I8Ptr, I32Ty, nullptr); + CallInst *CI = B.CreateCall( + StrChr, {CastToCStr(Ptr, B), ConstantInt::get(I32Ty, C)}, "strchr"); + if (const Function *F = dyn_cast<Function>(StrChr->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + return CI; +} + +/// EmitStrNCmp - Emit a call to the strncmp function to the builder. +Value *llvm::EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B, + const DataLayout &DL, const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::strncmp)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[3]; + AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture); + Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind }; + AS[2] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, AVs); + + LLVMContext &Context = B.GetInsertBlock()->getContext(); + Value *StrNCmp = M->getOrInsertFunction( + "strncmp", AttributeSet::get(M->getContext(), AS), B.getInt32Ty(), + B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context), nullptr); + CallInst *CI = B.CreateCall( + StrNCmp, {CastToCStr(Ptr1, B), CastToCStr(Ptr2, B), Len}, "strncmp"); + + if (const Function *F = dyn_cast<Function>(StrNCmp->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + + return CI; +} + +/// EmitStrCpy - Emit a call to the strcpy function to the builder, for the +/// specified pointer arguments. +Value *llvm::EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B, + const TargetLibraryInfo *TLI, StringRef Name) { + if (!TLI->has(LibFunc::strcpy)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[2]; + AS[0] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, + Attribute::NoUnwind); + Type *I8Ptr = B.getInt8PtrTy(); + Value *StrCpy = M->getOrInsertFunction(Name, + AttributeSet::get(M->getContext(), AS), + I8Ptr, I8Ptr, I8Ptr, nullptr); + CallInst *CI = + B.CreateCall(StrCpy, {CastToCStr(Dst, B), CastToCStr(Src, B)}, Name); + if (const Function *F = dyn_cast<Function>(StrCpy->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + return CI; +} + +/// EmitStrNCpy - Emit a call to the strncpy function to the builder, for the +/// specified pointer arguments. +Value *llvm::EmitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B, + const TargetLibraryInfo *TLI, StringRef Name) { + if (!TLI->has(LibFunc::strncpy)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[2]; + AS[0] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, + Attribute::NoUnwind); + Type *I8Ptr = B.getInt8PtrTy(); + Value *StrNCpy = M->getOrInsertFunction(Name, + AttributeSet::get(M->getContext(), + AS), + I8Ptr, I8Ptr, I8Ptr, + Len->getType(), nullptr); + CallInst *CI = B.CreateCall( + StrNCpy, {CastToCStr(Dst, B), CastToCStr(Src, B), Len}, "strncpy"); + if (const Function *F = dyn_cast<Function>(StrNCpy->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + return CI; +} + +/// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder. +/// This expects that the Len and ObjSize have type 'intptr_t' and Dst/Src +/// are pointers. +Value *llvm::EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize, + IRBuilder<> &B, const DataLayout &DL, + const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::memcpy_chk)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS; + AS = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, + Attribute::NoUnwind); + LLVMContext &Context = B.GetInsertBlock()->getContext(); + Value *MemCpy = M->getOrInsertFunction( + "__memcpy_chk", AttributeSet::get(M->getContext(), AS), B.getInt8PtrTy(), + B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context), + DL.getIntPtrType(Context), nullptr); + Dst = CastToCStr(Dst, B); + Src = CastToCStr(Src, B); + CallInst *CI = B.CreateCall(MemCpy, {Dst, Src, Len, ObjSize}); + if (const Function *F = dyn_cast<Function>(MemCpy->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + return CI; +} + +/// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is +/// a pointer, Val is an i32 value, and Len is an 'intptr_t' value. +Value *llvm::EmitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B, + const DataLayout &DL, const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::memchr)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS; + Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind }; + AS = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, AVs); + LLVMContext &Context = B.GetInsertBlock()->getContext(); + Value *MemChr = M->getOrInsertFunction( + "memchr", AttributeSet::get(M->getContext(), AS), B.getInt8PtrTy(), + B.getInt8PtrTy(), B.getInt32Ty(), DL.getIntPtrType(Context), nullptr); + CallInst *CI = B.CreateCall(MemChr, {CastToCStr(Ptr, B), Val, Len}, "memchr"); + + if (const Function *F = dyn_cast<Function>(MemChr->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + + return CI; +} + +/// EmitMemCmp - Emit a call to the memcmp function. +Value *llvm::EmitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B, + const DataLayout &DL, const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::memcmp)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[3]; + AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture); + Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind }; + AS[2] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, AVs); + + LLVMContext &Context = B.GetInsertBlock()->getContext(); + Value *MemCmp = M->getOrInsertFunction( + "memcmp", AttributeSet::get(M->getContext(), AS), B.getInt32Ty(), + B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context), nullptr); + CallInst *CI = B.CreateCall( + MemCmp, {CastToCStr(Ptr1, B), CastToCStr(Ptr2, B), Len}, "memcmp"); + + if (const Function *F = dyn_cast<Function>(MemCmp->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + + return CI; +} + +/// Append a suffix to the function name according to the type of 'Op'. +static void AppendTypeSuffix(Value *Op, StringRef &Name, SmallString<20> &NameBuffer) { + if (!Op->getType()->isDoubleTy()) { + NameBuffer += Name; + + if (Op->getType()->isFloatTy()) + NameBuffer += 'f'; + else + NameBuffer += 'l'; + + Name = NameBuffer; + } + return; +} + +/// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name' (e.g. +/// 'floor'). This function is known to take a single of type matching 'Op' and +/// returns one value with the same type. If 'Op' is a long double, 'l' is +/// added as the suffix of name, if 'Op' is a float, we add a 'f' suffix. +Value *llvm::EmitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B, + const AttributeSet &Attrs) { + SmallString<20> NameBuffer; + AppendTypeSuffix(Op, Name, NameBuffer); + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + Value *Callee = M->getOrInsertFunction(Name, Op->getType(), + Op->getType(), nullptr); + CallInst *CI = B.CreateCall(Callee, Op, Name); + CI->setAttributes(Attrs); + if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + + return CI; +} + +/// EmitBinaryFloatFnCall - Emit a call to the binary function named 'Name' +/// (e.g. 'fmin'). This function is known to take type matching 'Op1' and 'Op2' +/// and return one value with the same type. If 'Op1/Op2' are long double, 'l' +/// is added as the suffix of name, if 'Op1/Op2' is a float, we add a 'f' +/// suffix. +Value *llvm::EmitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name, + IRBuilder<> &B, const AttributeSet &Attrs) { + SmallString<20> NameBuffer; + AppendTypeSuffix(Op1, Name, NameBuffer); + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + Value *Callee = M->getOrInsertFunction(Name, Op1->getType(), + Op1->getType(), Op2->getType(), nullptr); + CallInst *CI = B.CreateCall(Callee, {Op1, Op2}, Name); + CI->setAttributes(Attrs); + if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + + return CI; +} + +/// EmitPutChar - Emit a call to the putchar function. This assumes that Char +/// is an integer. +Value *llvm::EmitPutChar(Value *Char, IRBuilder<> &B, + const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::putchar)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + Value *PutChar = M->getOrInsertFunction("putchar", B.getInt32Ty(), + B.getInt32Ty(), nullptr); + CallInst *CI = B.CreateCall(PutChar, + B.CreateIntCast(Char, + B.getInt32Ty(), + /*isSigned*/true, + "chari"), + "putchar"); + + if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + return CI; +} + +/// EmitPutS - Emit a call to the puts function. This assumes that Str is +/// some pointer. +Value *llvm::EmitPutS(Value *Str, IRBuilder<> &B, + const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::puts)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[2]; + AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, + Attribute::NoUnwind); + + Value *PutS = M->getOrInsertFunction("puts", + AttributeSet::get(M->getContext(), AS), + B.getInt32Ty(), + B.getInt8PtrTy(), + nullptr); + CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts"); + if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts())) + CI->setCallingConv(F->getCallingConv()); + return CI; +} + +/// EmitFPutC - Emit a call to the fputc function. This assumes that Char is +/// an integer and File is a pointer to FILE. +Value *llvm::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B, + const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::fputc)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[2]; + AS[0] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, + Attribute::NoUnwind); + Constant *F; + if (File->getType()->isPointerTy()) + F = M->getOrInsertFunction("fputc", + AttributeSet::get(M->getContext(), AS), + B.getInt32Ty(), + B.getInt32Ty(), File->getType(), + nullptr); + else + F = M->getOrInsertFunction("fputc", + B.getInt32Ty(), + B.getInt32Ty(), + File->getType(), nullptr); + Char = B.CreateIntCast(Char, B.getInt32Ty(), /*isSigned*/true, + "chari"); + CallInst *CI = B.CreateCall(F, {Char, File}, "fputc"); + + if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) + CI->setCallingConv(Fn->getCallingConv()); + return CI; +} + +/// EmitFPutS - Emit a call to the puts function. Str is required to be a +/// pointer and File is a pointer to FILE. +Value *llvm::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B, + const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::fputs)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[3]; + AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture); + AS[2] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, + Attribute::NoUnwind); + StringRef FPutsName = TLI->getName(LibFunc::fputs); + Constant *F; + if (File->getType()->isPointerTy()) + F = M->getOrInsertFunction(FPutsName, + AttributeSet::get(M->getContext(), AS), + B.getInt32Ty(), + B.getInt8PtrTy(), + File->getType(), nullptr); + else + F = M->getOrInsertFunction(FPutsName, B.getInt32Ty(), + B.getInt8PtrTy(), + File->getType(), nullptr); + CallInst *CI = B.CreateCall(F, {CastToCStr(Str, B), File}, "fputs"); + + if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) + CI->setCallingConv(Fn->getCallingConv()); + return CI; +} + +/// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is +/// a pointer, Size is an 'intptr_t', and File is a pointer to FILE. +Value *llvm::EmitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B, + const DataLayout &DL, const TargetLibraryInfo *TLI) { + if (!TLI->has(LibFunc::fwrite)) + return nullptr; + + Module *M = B.GetInsertBlock()->getParent()->getParent(); + AttributeSet AS[3]; + AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture); + AS[1] = AttributeSet::get(M->getContext(), 4, Attribute::NoCapture); + AS[2] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, + Attribute::NoUnwind); + LLVMContext &Context = B.GetInsertBlock()->getContext(); + StringRef FWriteName = TLI->getName(LibFunc::fwrite); + Constant *F; + if (File->getType()->isPointerTy()) + F = M->getOrInsertFunction( + FWriteName, AttributeSet::get(M->getContext(), AS), + DL.getIntPtrType(Context), B.getInt8PtrTy(), DL.getIntPtrType(Context), + DL.getIntPtrType(Context), File->getType(), nullptr); + else + F = M->getOrInsertFunction(FWriteName, DL.getIntPtrType(Context), + B.getInt8PtrTy(), DL.getIntPtrType(Context), + DL.getIntPtrType(Context), File->getType(), + nullptr); + CallInst *CI = + B.CreateCall(F, {CastToCStr(Ptr, B), Size, + ConstantInt::get(DL.getIntPtrType(Context), 1), File}); + + if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) + CI->setCallingConv(Fn->getCallingConv()); + return CI; +} |
