1 //===- BuildLibCalls.cpp - Utility builder for libcalls -------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements some functions that will create standard C libcalls.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Transforms/Utils/BuildLibCalls.h"
15 #include "llvm/Type.h"
16 #include "llvm/Constants.h"
17 #include "llvm/Function.h"
18 #include "llvm/Module.h"
19 #include "llvm/Support/IRBuilder.h"
20 #include "llvm/Target/TargetData.h"
21 #include "llvm/LLVMContext.h"
22 #include "llvm/Intrinsics.h"
26 /// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
27 Value *llvm::CastToCStr(Value *V, IRBuilder<> &B) {
28 return B.CreateBitCast(V, B.getInt8PtrTy(), "cstr");
31 /// EmitStrLen - Emit a call to the strlen function to the builder, for the
32 /// specified pointer. This always returns an integer value of size intptr_t.
33 Value *llvm::EmitStrLen(Value *Ptr, IRBuilder<> &B, const TargetData *TD) {
34 Module *M = B.GetInsertBlock()->getParent()->getParent();
35 AttributeWithIndex AWI[2];
36 AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
37 AWI[1] = AttributeWithIndex::get(~0u, Attribute::ReadOnly |
40 LLVMContext &Context = B.GetInsertBlock()->getContext();
41 Constant *StrLen = M->getOrInsertFunction("strlen", AttrListPtr::get(AWI, 2),
42 TD->getIntPtrType(Context),
45 CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen");
46 if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts()))
47 CI->setCallingConv(F->getCallingConv());
52 /// EmitStrChr - Emit a call to the strchr function to the builder, for the
53 /// specified pointer and character. Ptr is required to be some pointer type,
54 /// and the return value has 'i8*' type.
55 Value *llvm::EmitStrChr(Value *Ptr, char C, IRBuilder<> &B,
56 const TargetData *TD) {
57 Module *M = B.GetInsertBlock()->getParent()->getParent();
58 AttributeWithIndex AWI =
59 AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind);
61 const Type *I8Ptr = B.getInt8PtrTy();
62 const Type *I32Ty = B.getInt32Ty();
63 Constant *StrChr = M->getOrInsertFunction("strchr", AttrListPtr::get(&AWI, 1),
64 I8Ptr, I8Ptr, I32Ty, NULL);
65 CallInst *CI = B.CreateCall2(StrChr, CastToCStr(Ptr, B),
66 ConstantInt::get(I32Ty, C), "strchr");
67 if (const Function *F = dyn_cast<Function>(StrChr->stripPointerCasts()))
68 CI->setCallingConv(F->getCallingConv());
72 /// EmitStrCpy - Emit a call to the strcpy function to the builder, for the
73 /// specified pointer arguments.
74 Value *llvm::EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
75 const TargetData *TD) {
76 Module *M = B.GetInsertBlock()->getParent()->getParent();
77 AttributeWithIndex AWI[2];
78 AWI[0] = AttributeWithIndex::get(2, Attribute::NoCapture);
79 AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
80 const Type *I8Ptr = B.getInt8PtrTy();
81 Value *StrCpy = M->getOrInsertFunction("strcpy", AttrListPtr::get(AWI, 2),
82 I8Ptr, I8Ptr, I8Ptr, NULL);
83 CallInst *CI = B.CreateCall2(StrCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
85 if (const Function *F = dyn_cast<Function>(StrCpy->stripPointerCasts()))
86 CI->setCallingConv(F->getCallingConv());
90 /// EmitMemCpy - Emit a call to the memcpy function to the builder. This always
91 /// expects that the size has type 'intptr_t' and Dst/Src are pointers.
92 Value *llvm::EmitMemCpy(Value *Dst, Value *Src, Value *Len,
93 unsigned Align, IRBuilder<> &B, const TargetData *TD) {
94 Module *M = B.GetInsertBlock()->getParent()->getParent();
95 const Type *Ty = Len->getType();
96 Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, &Ty, 1);
97 Dst = CastToCStr(Dst, B);
98 Src = CastToCStr(Src, B);
99 return B.CreateCall4(MemCpy, Dst, Src, Len,
100 ConstantInt::get(B.getInt32Ty(), Align));
103 /// EmitMemMove - Emit a call to the memmove function to the builder. This
104 /// always expects that the size has type 'intptr_t' and Dst/Src are pointers.
105 Value *llvm::EmitMemMove(Value *Dst, Value *Src, Value *Len,
106 unsigned Align, IRBuilder<> &B, const TargetData *TD) {
107 Module *M = B.GetInsertBlock()->getParent()->getParent();
108 LLVMContext &Context = B.GetInsertBlock()->getContext();
109 const Type *Ty = TD->getIntPtrType(Context);
110 Value *MemMove = Intrinsic::getDeclaration(M, Intrinsic::memmove, &Ty, 1);
111 Dst = CastToCStr(Dst, B);
112 Src = CastToCStr(Src, B);
113 Value *A = ConstantInt::get(B.getInt32Ty(), Align);
114 return B.CreateCall4(MemMove, Dst, Src, Len, A);
117 /// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is
118 /// a pointer, Val is an i32 value, and Len is an 'intptr_t' value.
119 Value *llvm::EmitMemChr(Value *Ptr, Value *Val,
120 Value *Len, IRBuilder<> &B, const TargetData *TD) {
121 Module *M = B.GetInsertBlock()->getParent()->getParent();
122 AttributeWithIndex AWI;
123 AWI = AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind);
124 LLVMContext &Context = B.GetInsertBlock()->getContext();
125 Value *MemChr = M->getOrInsertFunction("memchr", AttrListPtr::get(&AWI, 1),
129 TD->getIntPtrType(Context),
131 CallInst *CI = B.CreateCall3(MemChr, CastToCStr(Ptr, B), Val, Len, "memchr");
133 if (const Function *F = dyn_cast<Function>(MemChr->stripPointerCasts()))
134 CI->setCallingConv(F->getCallingConv());
139 /// EmitMemCmp - Emit a call to the memcmp function.
140 Value *llvm::EmitMemCmp(Value *Ptr1, Value *Ptr2,
141 Value *Len, IRBuilder<> &B, const TargetData *TD) {
142 Module *M = B.GetInsertBlock()->getParent()->getParent();
143 AttributeWithIndex AWI[3];
144 AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
145 AWI[1] = AttributeWithIndex::get(2, Attribute::NoCapture);
146 AWI[2] = AttributeWithIndex::get(~0u, Attribute::ReadOnly |
147 Attribute::NoUnwind);
149 LLVMContext &Context = B.GetInsertBlock()->getContext();
150 Value *MemCmp = M->getOrInsertFunction("memcmp", AttrListPtr::get(AWI, 3),
154 TD->getIntPtrType(Context), NULL);
155 CallInst *CI = B.CreateCall3(MemCmp, CastToCStr(Ptr1, B), CastToCStr(Ptr2, B),
158 if (const Function *F = dyn_cast<Function>(MemCmp->stripPointerCasts()))
159 CI->setCallingConv(F->getCallingConv());
164 /// EmitMemSet - Emit a call to the memset function
165 Value *llvm::EmitMemSet(Value *Dst, Value *Val,
166 Value *Len, IRBuilder<> &B, const TargetData *TD) {
167 Module *M = B.GetInsertBlock()->getParent()->getParent();
168 Intrinsic::ID IID = Intrinsic::memset;
170 Tys[0] = Len->getType();
171 Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 1);
172 Value *Align = ConstantInt::get(B.getInt32Ty(), 1);
173 return B.CreateCall4(MemSet, CastToCStr(Dst, B), Val, Len, Align);
176 /// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name' (e.g.
177 /// 'floor'). This function is known to take a single of type matching 'Op' and
178 /// returns one value with the same type. If 'Op' is a long double, 'l' is
179 /// added as the suffix of name, if 'Op' is a float, we add a 'f' suffix.
180 Value *llvm::EmitUnaryFloatFnCall(Value *Op, const char *Name,
181 IRBuilder<> &B, const AttrListPtr &Attrs) {
183 if (!Op->getType()->isDoubleTy()) {
184 // If we need to add a suffix, copy into NameBuffer.
185 unsigned NameLen = strlen(Name);
186 assert(NameLen < sizeof(NameBuffer)-2);
187 memcpy(NameBuffer, Name, NameLen);
188 if (Op->getType()->isFloatTy())
189 NameBuffer[NameLen] = 'f'; // floorf
191 NameBuffer[NameLen] = 'l'; // floorl
192 NameBuffer[NameLen+1] = 0;
196 Module *M = B.GetInsertBlock()->getParent()->getParent();
197 Value *Callee = M->getOrInsertFunction(Name, Op->getType(),
198 Op->getType(), NULL);
199 CallInst *CI = B.CreateCall(Callee, Op, Name);
200 CI->setAttributes(Attrs);
201 if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts()))
202 CI->setCallingConv(F->getCallingConv());
207 /// EmitPutChar - Emit a call to the putchar function. This assumes that Char
209 Value *llvm::EmitPutChar(Value *Char, IRBuilder<> &B, const TargetData *TD) {
210 Module *M = B.GetInsertBlock()->getParent()->getParent();
211 Value *PutChar = M->getOrInsertFunction("putchar", B.getInt32Ty(),
212 B.getInt32Ty(), NULL);
213 CallInst *CI = B.CreateCall(PutChar,
214 B.CreateIntCast(Char,
220 if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts()))
221 CI->setCallingConv(F->getCallingConv());
225 /// EmitPutS - Emit a call to the puts function. This assumes that Str is
227 void llvm::EmitPutS(Value *Str, IRBuilder<> &B, const TargetData *TD) {
228 Module *M = B.GetInsertBlock()->getParent()->getParent();
229 AttributeWithIndex AWI[2];
230 AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
231 AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
233 Value *PutS = M->getOrInsertFunction("puts", AttrListPtr::get(AWI, 2),
237 CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts");
238 if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts()))
239 CI->setCallingConv(F->getCallingConv());
243 /// EmitFPutC - Emit a call to the fputc function. This assumes that Char is
244 /// an integer and File is a pointer to FILE.
245 void llvm::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B,
246 const TargetData *TD) {
247 Module *M = B.GetInsertBlock()->getParent()->getParent();
248 AttributeWithIndex AWI[2];
249 AWI[0] = AttributeWithIndex::get(2, Attribute::NoCapture);
250 AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
252 if (File->getType()->isPointerTy())
253 F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI, 2),
255 B.getInt32Ty(), File->getType(),
258 F = M->getOrInsertFunction("fputc",
261 File->getType(), NULL);
262 Char = B.CreateIntCast(Char, B.getInt32Ty(), /*isSigned*/true,
264 CallInst *CI = B.CreateCall2(F, Char, File, "fputc");
266 if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
267 CI->setCallingConv(Fn->getCallingConv());
270 /// EmitFPutS - Emit a call to the puts function. Str is required to be a
271 /// pointer and File is a pointer to FILE.
272 void llvm::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B,
273 const TargetData *TD) {
274 Module *M = B.GetInsertBlock()->getParent()->getParent();
275 AttributeWithIndex AWI[3];
276 AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
277 AWI[1] = AttributeWithIndex::get(2, Attribute::NoCapture);
278 AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
280 if (File->getType()->isPointerTy())
281 F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3),
284 File->getType(), NULL);
286 F = M->getOrInsertFunction("fputs", B.getInt32Ty(),
288 File->getType(), NULL);
289 CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs");
291 if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
292 CI->setCallingConv(Fn->getCallingConv());
295 /// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is
296 /// a pointer, Size is an 'intptr_t', and File is a pointer to FILE.
297 void llvm::EmitFWrite(Value *Ptr, Value *Size, Value *File,
298 IRBuilder<> &B, const TargetData *TD) {
299 Module *M = B.GetInsertBlock()->getParent()->getParent();
300 AttributeWithIndex AWI[3];
301 AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
302 AWI[1] = AttributeWithIndex::get(4, Attribute::NoCapture);
303 AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
304 LLVMContext &Context = B.GetInsertBlock()->getContext();
306 if (File->getType()->isPointerTy())
307 F = M->getOrInsertFunction("fwrite", AttrListPtr::get(AWI, 3),
308 TD->getIntPtrType(Context),
310 TD->getIntPtrType(Context),
311 TD->getIntPtrType(Context),
312 File->getType(), NULL);
314 F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(Context),
316 TD->getIntPtrType(Context),
317 TD->getIntPtrType(Context),
318 File->getType(), NULL);
319 CallInst *CI = B.CreateCall4(F, CastToCStr(Ptr, B), Size,
320 ConstantInt::get(TD->getIntPtrType(Context), 1), File);
322 if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
323 CI->setCallingConv(Fn->getCallingConv());