BuildLibCalls.cpp revision 204792
1204792Srdivacky//===- BuildLibCalls.cpp - Utility builder for libcalls -------------------===// 2204792Srdivacky// 3204792Srdivacky// The LLVM Compiler Infrastructure 4204792Srdivacky// 5204792Srdivacky// This file is distributed under the University of Illinois Open Source 6204792Srdivacky// License. See LICENSE.TXT for details. 7204792Srdivacky// 8204792Srdivacky//===----------------------------------------------------------------------===// 9204792Srdivacky// 10204792Srdivacky// This file implements some functions that will create standard C libcalls. 11204792Srdivacky// 12204792Srdivacky//===----------------------------------------------------------------------===// 13204792Srdivacky 14204792Srdivacky#include "llvm/Transforms/Utils/BuildLibCalls.h" 15204792Srdivacky#include "llvm/Type.h" 16204792Srdivacky#include "llvm/Constants.h" 17204792Srdivacky#include "llvm/Function.h" 18204792Srdivacky#include "llvm/Module.h" 19204792Srdivacky#include "llvm/Support/IRBuilder.h" 20204792Srdivacky#include "llvm/Target/TargetData.h" 21204792Srdivacky#include "llvm/LLVMContext.h" 22204792Srdivacky#include "llvm/Intrinsics.h" 23204792Srdivacky 24204792Srdivackyusing namespace llvm; 25204792Srdivacky 26204792Srdivacky/// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*. 27204792SrdivackyValue *llvm::CastToCStr(Value *V, IRBuilder<> &B) { 28204792Srdivacky return B.CreateBitCast(V, B.getInt8PtrTy(), "cstr"); 29204792Srdivacky} 30204792Srdivacky 31204792Srdivacky/// EmitStrLen - Emit a call to the strlen function to the builder, for the 32204792Srdivacky/// specified pointer. This always returns an integer value of size intptr_t. 33204792SrdivackyValue *llvm::EmitStrLen(Value *Ptr, IRBuilder<> &B, const TargetData *TD) { 34204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 35204792Srdivacky AttributeWithIndex AWI[2]; 36204792Srdivacky AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture); 37204792Srdivacky AWI[1] = AttributeWithIndex::get(~0u, Attribute::ReadOnly | 38204792Srdivacky Attribute::NoUnwind); 39204792Srdivacky 40204792Srdivacky LLVMContext &Context = B.GetInsertBlock()->getContext(); 41204792Srdivacky Constant *StrLen = M->getOrInsertFunction("strlen", AttrListPtr::get(AWI, 2), 42204792Srdivacky TD->getIntPtrType(Context), 43204792Srdivacky B.getInt8PtrTy(), 44204792Srdivacky NULL); 45204792Srdivacky CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen"); 46204792Srdivacky if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts())) 47204792Srdivacky CI->setCallingConv(F->getCallingConv()); 48204792Srdivacky 49204792Srdivacky return CI; 50204792Srdivacky} 51204792Srdivacky 52204792Srdivacky/// EmitStrChr - Emit a call to the strchr function to the builder, for the 53204792Srdivacky/// specified pointer and character. Ptr is required to be some pointer type, 54204792Srdivacky/// and the return value has 'i8*' type. 55204792SrdivackyValue *llvm::EmitStrChr(Value *Ptr, char C, IRBuilder<> &B, 56204792Srdivacky const TargetData *TD) { 57204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 58204792Srdivacky AttributeWithIndex AWI = 59204792Srdivacky AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind); 60204792Srdivacky 61204792Srdivacky const Type *I8Ptr = B.getInt8PtrTy(); 62204792Srdivacky const Type *I32Ty = B.getInt32Ty(); 63204792Srdivacky Constant *StrChr = M->getOrInsertFunction("strchr", AttrListPtr::get(&AWI, 1), 64204792Srdivacky I8Ptr, I8Ptr, I32Ty, NULL); 65204792Srdivacky CallInst *CI = B.CreateCall2(StrChr, CastToCStr(Ptr, B), 66204792Srdivacky ConstantInt::get(I32Ty, C), "strchr"); 67204792Srdivacky if (const Function *F = dyn_cast<Function>(StrChr->stripPointerCasts())) 68204792Srdivacky CI->setCallingConv(F->getCallingConv()); 69204792Srdivacky return CI; 70204792Srdivacky} 71204792Srdivacky 72204792Srdivacky/// EmitStrCpy - Emit a call to the strcpy function to the builder, for the 73204792Srdivacky/// specified pointer arguments. 74204792SrdivackyValue *llvm::EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B, 75204792Srdivacky const TargetData *TD) { 76204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 77204792Srdivacky AttributeWithIndex AWI[2]; 78204792Srdivacky AWI[0] = AttributeWithIndex::get(2, Attribute::NoCapture); 79204792Srdivacky AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); 80204792Srdivacky const Type *I8Ptr = B.getInt8PtrTy(); 81204792Srdivacky Value *StrCpy = M->getOrInsertFunction("strcpy", AttrListPtr::get(AWI, 2), 82204792Srdivacky I8Ptr, I8Ptr, I8Ptr, NULL); 83204792Srdivacky CallInst *CI = B.CreateCall2(StrCpy, CastToCStr(Dst, B), CastToCStr(Src, B), 84204792Srdivacky "strcpy"); 85204792Srdivacky if (const Function *F = dyn_cast<Function>(StrCpy->stripPointerCasts())) 86204792Srdivacky CI->setCallingConv(F->getCallingConv()); 87204792Srdivacky return CI; 88204792Srdivacky} 89204792Srdivacky 90204792Srdivacky/// EmitMemCpy - Emit a call to the memcpy function to the builder. This always 91204792Srdivacky/// expects that the size has type 'intptr_t' and Dst/Src are pointers. 92204792SrdivackyValue *llvm::EmitMemCpy(Value *Dst, Value *Src, Value *Len, 93204792Srdivacky unsigned Align, IRBuilder<> &B, const TargetData *TD) { 94204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 95204792Srdivacky const Type *Ty = Len->getType(); 96204792Srdivacky Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, &Ty, 1); 97204792Srdivacky Dst = CastToCStr(Dst, B); 98204792Srdivacky Src = CastToCStr(Src, B); 99204792Srdivacky return B.CreateCall4(MemCpy, Dst, Src, Len, 100204792Srdivacky ConstantInt::get(B.getInt32Ty(), Align)); 101204792Srdivacky} 102204792Srdivacky 103204792Srdivacky/// EmitMemMove - Emit a call to the memmove function to the builder. This 104204792Srdivacky/// always expects that the size has type 'intptr_t' and Dst/Src are pointers. 105204792SrdivackyValue *llvm::EmitMemMove(Value *Dst, Value *Src, Value *Len, 106204792Srdivacky unsigned Align, IRBuilder<> &B, const TargetData *TD) { 107204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 108204792Srdivacky LLVMContext &Context = B.GetInsertBlock()->getContext(); 109204792Srdivacky const Type *Ty = TD->getIntPtrType(Context); 110204792Srdivacky Value *MemMove = Intrinsic::getDeclaration(M, Intrinsic::memmove, &Ty, 1); 111204792Srdivacky Dst = CastToCStr(Dst, B); 112204792Srdivacky Src = CastToCStr(Src, B); 113204792Srdivacky Value *A = ConstantInt::get(B.getInt32Ty(), Align); 114204792Srdivacky return B.CreateCall4(MemMove, Dst, Src, Len, A); 115204792Srdivacky} 116204792Srdivacky 117204792Srdivacky/// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is 118204792Srdivacky/// a pointer, Val is an i32 value, and Len is an 'intptr_t' value. 119204792SrdivackyValue *llvm::EmitMemChr(Value *Ptr, Value *Val, 120204792Srdivacky Value *Len, IRBuilder<> &B, const TargetData *TD) { 121204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 122204792Srdivacky AttributeWithIndex AWI; 123204792Srdivacky AWI = AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind); 124204792Srdivacky LLVMContext &Context = B.GetInsertBlock()->getContext(); 125204792Srdivacky Value *MemChr = M->getOrInsertFunction("memchr", AttrListPtr::get(&AWI, 1), 126204792Srdivacky B.getInt8PtrTy(), 127204792Srdivacky B.getInt8PtrTy(), 128204792Srdivacky B.getInt32Ty(), 129204792Srdivacky TD->getIntPtrType(Context), 130204792Srdivacky NULL); 131204792Srdivacky CallInst *CI = B.CreateCall3(MemChr, CastToCStr(Ptr, B), Val, Len, "memchr"); 132204792Srdivacky 133204792Srdivacky if (const Function *F = dyn_cast<Function>(MemChr->stripPointerCasts())) 134204792Srdivacky CI->setCallingConv(F->getCallingConv()); 135204792Srdivacky 136204792Srdivacky return CI; 137204792Srdivacky} 138204792Srdivacky 139204792Srdivacky/// EmitMemCmp - Emit a call to the memcmp function. 140204792SrdivackyValue *llvm::EmitMemCmp(Value *Ptr1, Value *Ptr2, 141204792Srdivacky Value *Len, IRBuilder<> &B, const TargetData *TD) { 142204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 143204792Srdivacky AttributeWithIndex AWI[3]; 144204792Srdivacky AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture); 145204792Srdivacky AWI[1] = AttributeWithIndex::get(2, Attribute::NoCapture); 146204792Srdivacky AWI[2] = AttributeWithIndex::get(~0u, Attribute::ReadOnly | 147204792Srdivacky Attribute::NoUnwind); 148204792Srdivacky 149204792Srdivacky LLVMContext &Context = B.GetInsertBlock()->getContext(); 150204792Srdivacky Value *MemCmp = M->getOrInsertFunction("memcmp", AttrListPtr::get(AWI, 3), 151204792Srdivacky B.getInt32Ty(), 152204792Srdivacky B.getInt8PtrTy(), 153204792Srdivacky B.getInt8PtrTy(), 154204792Srdivacky TD->getIntPtrType(Context), NULL); 155204792Srdivacky CallInst *CI = B.CreateCall3(MemCmp, CastToCStr(Ptr1, B), CastToCStr(Ptr2, B), 156204792Srdivacky Len, "memcmp"); 157204792Srdivacky 158204792Srdivacky if (const Function *F = dyn_cast<Function>(MemCmp->stripPointerCasts())) 159204792Srdivacky CI->setCallingConv(F->getCallingConv()); 160204792Srdivacky 161204792Srdivacky return CI; 162204792Srdivacky} 163204792Srdivacky 164204792Srdivacky/// EmitMemSet - Emit a call to the memset function 165204792SrdivackyValue *llvm::EmitMemSet(Value *Dst, Value *Val, 166204792Srdivacky Value *Len, IRBuilder<> &B, const TargetData *TD) { 167204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 168204792Srdivacky Intrinsic::ID IID = Intrinsic::memset; 169204792Srdivacky const Type *Tys[1]; 170204792Srdivacky Tys[0] = Len->getType(); 171204792Srdivacky Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 1); 172204792Srdivacky Value *Align = ConstantInt::get(B.getInt32Ty(), 1); 173204792Srdivacky return B.CreateCall4(MemSet, CastToCStr(Dst, B), Val, Len, Align); 174204792Srdivacky} 175204792Srdivacky 176204792Srdivacky/// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name' (e.g. 177204792Srdivacky/// 'floor'). This function is known to take a single of type matching 'Op' and 178204792Srdivacky/// returns one value with the same type. If 'Op' is a long double, 'l' is 179204792Srdivacky/// added as the suffix of name, if 'Op' is a float, we add a 'f' suffix. 180204792SrdivackyValue *llvm::EmitUnaryFloatFnCall(Value *Op, const char *Name, 181204792Srdivacky IRBuilder<> &B, const AttrListPtr &Attrs) { 182204792Srdivacky char NameBuffer[20]; 183204792Srdivacky if (!Op->getType()->isDoubleTy()) { 184204792Srdivacky // If we need to add a suffix, copy into NameBuffer. 185204792Srdivacky unsigned NameLen = strlen(Name); 186204792Srdivacky assert(NameLen < sizeof(NameBuffer)-2); 187204792Srdivacky memcpy(NameBuffer, Name, NameLen); 188204792Srdivacky if (Op->getType()->isFloatTy()) 189204792Srdivacky NameBuffer[NameLen] = 'f'; // floorf 190204792Srdivacky else 191204792Srdivacky NameBuffer[NameLen] = 'l'; // floorl 192204792Srdivacky NameBuffer[NameLen+1] = 0; 193204792Srdivacky Name = NameBuffer; 194204792Srdivacky } 195204792Srdivacky 196204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 197204792Srdivacky Value *Callee = M->getOrInsertFunction(Name, Op->getType(), 198204792Srdivacky Op->getType(), NULL); 199204792Srdivacky CallInst *CI = B.CreateCall(Callee, Op, Name); 200204792Srdivacky CI->setAttributes(Attrs); 201204792Srdivacky if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts())) 202204792Srdivacky CI->setCallingConv(F->getCallingConv()); 203204792Srdivacky 204204792Srdivacky return CI; 205204792Srdivacky} 206204792Srdivacky 207204792Srdivacky/// EmitPutChar - Emit a call to the putchar function. This assumes that Char 208204792Srdivacky/// is an integer. 209204792SrdivackyValue *llvm::EmitPutChar(Value *Char, IRBuilder<> &B, const TargetData *TD) { 210204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 211204792Srdivacky Value *PutChar = M->getOrInsertFunction("putchar", B.getInt32Ty(), 212204792Srdivacky B.getInt32Ty(), NULL); 213204792Srdivacky CallInst *CI = B.CreateCall(PutChar, 214204792Srdivacky B.CreateIntCast(Char, 215204792Srdivacky B.getInt32Ty(), 216204792Srdivacky /*isSigned*/true, 217204792Srdivacky "chari"), 218204792Srdivacky "putchar"); 219204792Srdivacky 220204792Srdivacky if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts())) 221204792Srdivacky CI->setCallingConv(F->getCallingConv()); 222204792Srdivacky return CI; 223204792Srdivacky} 224204792Srdivacky 225204792Srdivacky/// EmitPutS - Emit a call to the puts function. This assumes that Str is 226204792Srdivacky/// some pointer. 227204792Srdivackyvoid llvm::EmitPutS(Value *Str, IRBuilder<> &B, const TargetData *TD) { 228204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 229204792Srdivacky AttributeWithIndex AWI[2]; 230204792Srdivacky AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture); 231204792Srdivacky AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); 232204792Srdivacky 233204792Srdivacky Value *PutS = M->getOrInsertFunction("puts", AttrListPtr::get(AWI, 2), 234204792Srdivacky B.getInt32Ty(), 235204792Srdivacky B.getInt8PtrTy(), 236204792Srdivacky NULL); 237204792Srdivacky CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts"); 238204792Srdivacky if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts())) 239204792Srdivacky CI->setCallingConv(F->getCallingConv()); 240204792Srdivacky 241204792Srdivacky} 242204792Srdivacky 243204792Srdivacky/// EmitFPutC - Emit a call to the fputc function. This assumes that Char is 244204792Srdivacky/// an integer and File is a pointer to FILE. 245204792Srdivackyvoid llvm::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B, 246204792Srdivacky const TargetData *TD) { 247204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 248204792Srdivacky AttributeWithIndex AWI[2]; 249204792Srdivacky AWI[0] = AttributeWithIndex::get(2, Attribute::NoCapture); 250204792Srdivacky AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); 251204792Srdivacky Constant *F; 252204792Srdivacky if (File->getType()->isPointerTy()) 253204792Srdivacky F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI, 2), 254204792Srdivacky B.getInt32Ty(), 255204792Srdivacky B.getInt32Ty(), File->getType(), 256204792Srdivacky NULL); 257204792Srdivacky else 258204792Srdivacky F = M->getOrInsertFunction("fputc", 259204792Srdivacky B.getInt32Ty(), 260204792Srdivacky B.getInt32Ty(), 261204792Srdivacky File->getType(), NULL); 262204792Srdivacky Char = B.CreateIntCast(Char, B.getInt32Ty(), /*isSigned*/true, 263204792Srdivacky "chari"); 264204792Srdivacky CallInst *CI = B.CreateCall2(F, Char, File, "fputc"); 265204792Srdivacky 266204792Srdivacky if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) 267204792Srdivacky CI->setCallingConv(Fn->getCallingConv()); 268204792Srdivacky} 269204792Srdivacky 270204792Srdivacky/// EmitFPutS - Emit a call to the puts function. Str is required to be a 271204792Srdivacky/// pointer and File is a pointer to FILE. 272204792Srdivackyvoid llvm::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B, 273204792Srdivacky const TargetData *TD) { 274204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 275204792Srdivacky AttributeWithIndex AWI[3]; 276204792Srdivacky AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture); 277204792Srdivacky AWI[1] = AttributeWithIndex::get(2, Attribute::NoCapture); 278204792Srdivacky AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); 279204792Srdivacky Constant *F; 280204792Srdivacky if (File->getType()->isPointerTy()) 281204792Srdivacky F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3), 282204792Srdivacky B.getInt32Ty(), 283204792Srdivacky B.getInt8PtrTy(), 284204792Srdivacky File->getType(), NULL); 285204792Srdivacky else 286204792Srdivacky F = M->getOrInsertFunction("fputs", B.getInt32Ty(), 287204792Srdivacky B.getInt8PtrTy(), 288204792Srdivacky File->getType(), NULL); 289204792Srdivacky CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs"); 290204792Srdivacky 291204792Srdivacky if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) 292204792Srdivacky CI->setCallingConv(Fn->getCallingConv()); 293204792Srdivacky} 294204792Srdivacky 295204792Srdivacky/// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is 296204792Srdivacky/// a pointer, Size is an 'intptr_t', and File is a pointer to FILE. 297204792Srdivackyvoid llvm::EmitFWrite(Value *Ptr, Value *Size, Value *File, 298204792Srdivacky IRBuilder<> &B, const TargetData *TD) { 299204792Srdivacky Module *M = B.GetInsertBlock()->getParent()->getParent(); 300204792Srdivacky AttributeWithIndex AWI[3]; 301204792Srdivacky AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture); 302204792Srdivacky AWI[1] = AttributeWithIndex::get(4, Attribute::NoCapture); 303204792Srdivacky AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); 304204792Srdivacky LLVMContext &Context = B.GetInsertBlock()->getContext(); 305204792Srdivacky Constant *F; 306204792Srdivacky if (File->getType()->isPointerTy()) 307204792Srdivacky F = M->getOrInsertFunction("fwrite", AttrListPtr::get(AWI, 3), 308204792Srdivacky TD->getIntPtrType(Context), 309204792Srdivacky B.getInt8PtrTy(), 310204792Srdivacky TD->getIntPtrType(Context), 311204792Srdivacky TD->getIntPtrType(Context), 312204792Srdivacky File->getType(), NULL); 313204792Srdivacky else 314204792Srdivacky F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(Context), 315204792Srdivacky B.getInt8PtrTy(), 316204792Srdivacky TD->getIntPtrType(Context), 317204792Srdivacky TD->getIntPtrType(Context), 318204792Srdivacky File->getType(), NULL); 319204792Srdivacky CallInst *CI = B.CreateCall4(F, CastToCStr(Ptr, B), Size, 320204792Srdivacky ConstantInt::get(TD->getIntPtrType(Context), 1), File); 321204792Srdivacky 322204792Srdivacky if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) 323204792Srdivacky CI->setCallingConv(Fn->getCallingConv()); 324204792Srdivacky} 325