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/Constants.h"
16 #include "llvm/Function.h"
17 #include "llvm/IRBuilder.h"
18 #include "llvm/Intrinsics.h"
19 #include "llvm/Intrinsics.h"
20 #include "llvm/LLVMContext.h"
21 #include "llvm/LLVMContext.h"
22 #include "llvm/Module.h"
23 #include "llvm/Type.h"
24 #include "llvm/ADT/SmallString.h"
25 #include "llvm/DataLayout.h"
26 #include "llvm/Target/TargetLibraryInfo.h"
30 /// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
31 Value *llvm::CastToCStr(Value *V, IRBuilder<> &B) {
32 return B.CreateBitCast(V, B.getInt8PtrTy(), "cstr");
35 /// EmitStrLen - Emit a call to the strlen function to the builder, for the
36 /// specified pointer. This always returns an integer value of size intptr_t.
37 Value *llvm::EmitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout *TD,
38 const TargetLibraryInfo *TLI) {
39 if (!TLI->has(LibFunc::strlen))
42 Module *M = B.GetInsertBlock()->getParent()->getParent();
43 AttributeWithIndex AWI[2];
44 AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
45 Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
46 AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
47 ArrayRef<Attributes::AttrVal>(AVs, 2));
49 LLVMContext &Context = B.GetInsertBlock()->getContext();
50 Constant *StrLen = M->getOrInsertFunction("strlen", AttrListPtr::get(AWI),
51 TD->getIntPtrType(Context),
54 CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen");
55 if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts()))
56 CI->setCallingConv(F->getCallingConv());
61 /// EmitStrNLen - Emit a call to the strnlen function to the builder, for the
62 /// specified pointer. Ptr is required to be some pointer type, MaxLen must
63 /// be of size_t type, and the return value has 'intptr_t' type.
64 Value *llvm::EmitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
65 const DataLayout *TD, const TargetLibraryInfo *TLI) {
66 if (!TLI->has(LibFunc::strnlen))
69 Module *M = B.GetInsertBlock()->getParent()->getParent();
70 AttributeWithIndex AWI[2];
71 AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
72 Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
73 AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
74 ArrayRef<Attributes::AttrVal>(AVs, 2));
76 LLVMContext &Context = B.GetInsertBlock()->getContext();
77 Constant *StrNLen = M->getOrInsertFunction("strnlen", AttrListPtr::get(AWI),
78 TD->getIntPtrType(Context),
80 TD->getIntPtrType(Context),
82 CallInst *CI = B.CreateCall2(StrNLen, CastToCStr(Ptr, B), MaxLen, "strnlen");
83 if (const Function *F = dyn_cast<Function>(StrNLen->stripPointerCasts()))
84 CI->setCallingConv(F->getCallingConv());
89 /// EmitStrChr - Emit a call to the strchr function to the builder, for the
90 /// specified pointer and character. Ptr is required to be some pointer type,
91 /// and the return value has 'i8*' type.
92 Value *llvm::EmitStrChr(Value *Ptr, char C, IRBuilder<> &B,
93 const DataLayout *TD, const TargetLibraryInfo *TLI) {
94 if (!TLI->has(LibFunc::strchr))
97 Module *M = B.GetInsertBlock()->getParent()->getParent();
98 Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
99 AttributeWithIndex AWI =
100 AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
101 ArrayRef<Attributes::AttrVal>(AVs, 2));
103 Type *I8Ptr = B.getInt8PtrTy();
104 Type *I32Ty = B.getInt32Ty();
105 Constant *StrChr = M->getOrInsertFunction("strchr", AttrListPtr::get(AWI),
106 I8Ptr, I8Ptr, I32Ty, NULL);
107 CallInst *CI = B.CreateCall2(StrChr, CastToCStr(Ptr, B),
108 ConstantInt::get(I32Ty, C), "strchr");
109 if (const Function *F = dyn_cast<Function>(StrChr->stripPointerCasts()))
110 CI->setCallingConv(F->getCallingConv());
114 /// EmitStrNCmp - Emit a call to the strncmp function to the builder.
115 Value *llvm::EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len,
116 IRBuilder<> &B, const DataLayout *TD,
117 const TargetLibraryInfo *TLI) {
118 if (!TLI->has(LibFunc::strncmp))
121 Module *M = B.GetInsertBlock()->getParent()->getParent();
122 AttributeWithIndex AWI[3];
123 AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
124 AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
125 Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
126 AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
127 ArrayRef<Attributes::AttrVal>(AVs, 2));
129 LLVMContext &Context = B.GetInsertBlock()->getContext();
130 Value *StrNCmp = M->getOrInsertFunction("strncmp", AttrListPtr::get(AWI),
134 TD->getIntPtrType(Context), NULL);
135 CallInst *CI = B.CreateCall3(StrNCmp, CastToCStr(Ptr1, B),
136 CastToCStr(Ptr2, B), Len, "strncmp");
138 if (const Function *F = dyn_cast<Function>(StrNCmp->stripPointerCasts()))
139 CI->setCallingConv(F->getCallingConv());
144 /// EmitStrCpy - Emit a call to the strcpy function to the builder, for the
145 /// specified pointer arguments.
146 Value *llvm::EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
147 const DataLayout *TD, const TargetLibraryInfo *TLI,
149 if (!TLI->has(LibFunc::strcpy))
152 Module *M = B.GetInsertBlock()->getParent()->getParent();
153 AttributeWithIndex AWI[2];
154 AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
155 AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
156 Attributes::NoUnwind);
157 Type *I8Ptr = B.getInt8PtrTy();
158 Value *StrCpy = M->getOrInsertFunction(Name, AttrListPtr::get(AWI),
159 I8Ptr, I8Ptr, I8Ptr, NULL);
160 CallInst *CI = B.CreateCall2(StrCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
162 if (const Function *F = dyn_cast<Function>(StrCpy->stripPointerCasts()))
163 CI->setCallingConv(F->getCallingConv());
167 /// EmitStrNCpy - Emit a call to the strncpy function to the builder, for the
168 /// specified pointer arguments.
169 Value *llvm::EmitStrNCpy(Value *Dst, Value *Src, Value *Len,
170 IRBuilder<> &B, const DataLayout *TD,
171 const TargetLibraryInfo *TLI, StringRef Name) {
172 if (!TLI->has(LibFunc::strncpy))
175 Module *M = B.GetInsertBlock()->getParent()->getParent();
176 AttributeWithIndex AWI[2];
177 AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
178 AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
179 Attributes::NoUnwind);
180 Type *I8Ptr = B.getInt8PtrTy();
181 Value *StrNCpy = M->getOrInsertFunction(Name, AttrListPtr::get(AWI),
183 Len->getType(), NULL);
184 CallInst *CI = B.CreateCall3(StrNCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
186 if (const Function *F = dyn_cast<Function>(StrNCpy->stripPointerCasts()))
187 CI->setCallingConv(F->getCallingConv());
191 /// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder.
192 /// This expects that the Len and ObjSize have type 'intptr_t' and Dst/Src
194 Value *llvm::EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
195 IRBuilder<> &B, const DataLayout *TD,
196 const TargetLibraryInfo *TLI) {
197 if (!TLI->has(LibFunc::memcpy_chk))
200 Module *M = B.GetInsertBlock()->getParent()->getParent();
201 AttributeWithIndex AWI;
202 AWI = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
203 Attributes::NoUnwind);
204 LLVMContext &Context = B.GetInsertBlock()->getContext();
205 Value *MemCpy = M->getOrInsertFunction("__memcpy_chk",
206 AttrListPtr::get(AWI),
210 TD->getIntPtrType(Context),
211 TD->getIntPtrType(Context), NULL);
212 Dst = CastToCStr(Dst, B);
213 Src = CastToCStr(Src, B);
214 CallInst *CI = B.CreateCall4(MemCpy, Dst, Src, Len, ObjSize);
215 if (const Function *F = dyn_cast<Function>(MemCpy->stripPointerCasts()))
216 CI->setCallingConv(F->getCallingConv());
220 /// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is
221 /// a pointer, Val is an i32 value, and Len is an 'intptr_t' value.
222 Value *llvm::EmitMemChr(Value *Ptr, Value *Val,
223 Value *Len, IRBuilder<> &B, const DataLayout *TD,
224 const TargetLibraryInfo *TLI) {
225 if (!TLI->has(LibFunc::memchr))
228 Module *M = B.GetInsertBlock()->getParent()->getParent();
229 AttributeWithIndex AWI;
230 Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
231 AWI = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
232 ArrayRef<Attributes::AttrVal>(AVs, 2));
233 LLVMContext &Context = B.GetInsertBlock()->getContext();
234 Value *MemChr = M->getOrInsertFunction("memchr", AttrListPtr::get(AWI),
238 TD->getIntPtrType(Context),
240 CallInst *CI = B.CreateCall3(MemChr, CastToCStr(Ptr, B), Val, Len, "memchr");
242 if (const Function *F = dyn_cast<Function>(MemChr->stripPointerCasts()))
243 CI->setCallingConv(F->getCallingConv());
248 /// EmitMemCmp - Emit a call to the memcmp function.
249 Value *llvm::EmitMemCmp(Value *Ptr1, Value *Ptr2,
250 Value *Len, IRBuilder<> &B, const DataLayout *TD,
251 const TargetLibraryInfo *TLI) {
252 if (!TLI->has(LibFunc::memcmp))
255 Module *M = B.GetInsertBlock()->getParent()->getParent();
256 AttributeWithIndex AWI[3];
257 AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
258 AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
259 Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
260 AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
261 ArrayRef<Attributes::AttrVal>(AVs, 2));
263 LLVMContext &Context = B.GetInsertBlock()->getContext();
264 Value *MemCmp = M->getOrInsertFunction("memcmp", AttrListPtr::get(AWI),
268 TD->getIntPtrType(Context), NULL);
269 CallInst *CI = B.CreateCall3(MemCmp, CastToCStr(Ptr1, B), CastToCStr(Ptr2, B),
272 if (const Function *F = dyn_cast<Function>(MemCmp->stripPointerCasts()))
273 CI->setCallingConv(F->getCallingConv());
278 /// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name' (e.g.
279 /// 'floor'). This function is known to take a single of type matching 'Op' and
280 /// returns one value with the same type. If 'Op' is a long double, 'l' is
281 /// added as the suffix of name, if 'Op' is a float, we add a 'f' suffix.
282 Value *llvm::EmitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
283 const AttrListPtr &Attrs) {
284 SmallString<20> NameBuffer;
285 if (!Op->getType()->isDoubleTy()) {
286 // If we need to add a suffix, copy into NameBuffer.
288 if (Op->getType()->isFloatTy())
289 NameBuffer += 'f'; // floorf
291 NameBuffer += 'l'; // floorl
295 Module *M = B.GetInsertBlock()->getParent()->getParent();
296 Value *Callee = M->getOrInsertFunction(Name, Op->getType(),
297 Op->getType(), NULL);
298 CallInst *CI = B.CreateCall(Callee, Op, Name);
299 CI->setAttributes(Attrs);
300 if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts()))
301 CI->setCallingConv(F->getCallingConv());
306 /// EmitPutChar - Emit a call to the putchar function. This assumes that Char
308 Value *llvm::EmitPutChar(Value *Char, IRBuilder<> &B, const DataLayout *TD,
309 const TargetLibraryInfo *TLI) {
310 if (!TLI->has(LibFunc::putchar))
313 Module *M = B.GetInsertBlock()->getParent()->getParent();
314 Value *PutChar = M->getOrInsertFunction("putchar", B.getInt32Ty(),
315 B.getInt32Ty(), NULL);
316 CallInst *CI = B.CreateCall(PutChar,
317 B.CreateIntCast(Char,
323 if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts()))
324 CI->setCallingConv(F->getCallingConv());
328 /// EmitPutS - Emit a call to the puts function. This assumes that Str is
330 Value *llvm::EmitPutS(Value *Str, IRBuilder<> &B, const DataLayout *TD,
331 const TargetLibraryInfo *TLI) {
332 if (!TLI->has(LibFunc::puts))
335 Module *M = B.GetInsertBlock()->getParent()->getParent();
336 AttributeWithIndex AWI[2];
337 AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
338 AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
339 Attributes::NoUnwind);
341 Value *PutS = M->getOrInsertFunction("puts", AttrListPtr::get(AWI),
345 CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts");
346 if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts()))
347 CI->setCallingConv(F->getCallingConv());
351 /// EmitFPutC - Emit a call to the fputc function. This assumes that Char is
352 /// an integer and File is a pointer to FILE.
353 Value *llvm::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B,
354 const DataLayout *TD, const TargetLibraryInfo *TLI) {
355 if (!TLI->has(LibFunc::fputc))
358 Module *M = B.GetInsertBlock()->getParent()->getParent();
359 AttributeWithIndex AWI[2];
360 AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
361 AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
362 Attributes::NoUnwind);
364 if (File->getType()->isPointerTy())
365 F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI),
367 B.getInt32Ty(), File->getType(),
370 F = M->getOrInsertFunction("fputc",
373 File->getType(), NULL);
374 Char = B.CreateIntCast(Char, B.getInt32Ty(), /*isSigned*/true,
376 CallInst *CI = B.CreateCall2(F, Char, File, "fputc");
378 if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
379 CI->setCallingConv(Fn->getCallingConv());
383 /// EmitFPutS - Emit a call to the puts function. Str is required to be a
384 /// pointer and File is a pointer to FILE.
385 Value *llvm::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B,
386 const DataLayout *TD, const TargetLibraryInfo *TLI) {
387 if (!TLI->has(LibFunc::fputs))
390 Module *M = B.GetInsertBlock()->getParent()->getParent();
391 AttributeWithIndex AWI[3];
392 AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
393 AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
394 AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
395 Attributes::NoUnwind);
396 StringRef FPutsName = TLI->getName(LibFunc::fputs);
398 if (File->getType()->isPointerTy())
399 F = M->getOrInsertFunction(FPutsName, AttrListPtr::get(AWI),
402 File->getType(), NULL);
404 F = M->getOrInsertFunction(FPutsName, B.getInt32Ty(),
406 File->getType(), NULL);
407 CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs");
409 if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
410 CI->setCallingConv(Fn->getCallingConv());
414 /// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is
415 /// a pointer, Size is an 'intptr_t', and File is a pointer to FILE.
416 Value *llvm::EmitFWrite(Value *Ptr, Value *Size, Value *File,
417 IRBuilder<> &B, const DataLayout *TD,
418 const TargetLibraryInfo *TLI) {
419 if (!TLI->has(LibFunc::fwrite))
422 Module *M = B.GetInsertBlock()->getParent()->getParent();
423 AttributeWithIndex AWI[3];
424 AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
425 AWI[1] = AttributeWithIndex::get(M->getContext(), 4, Attributes::NoCapture);
426 AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
427 Attributes::NoUnwind);
428 LLVMContext &Context = B.GetInsertBlock()->getContext();
429 StringRef FWriteName = TLI->getName(LibFunc::fwrite);
431 if (File->getType()->isPointerTy())
432 F = M->getOrInsertFunction(FWriteName, AttrListPtr::get(AWI),
433 TD->getIntPtrType(Context),
435 TD->getIntPtrType(Context),
436 TD->getIntPtrType(Context),
437 File->getType(), NULL);
439 F = M->getOrInsertFunction(FWriteName, TD->getIntPtrType(Context),
441 TD->getIntPtrType(Context),
442 TD->getIntPtrType(Context),
443 File->getType(), NULL);
444 CallInst *CI = B.CreateCall4(F, CastToCStr(Ptr, B), Size,
445 ConstantInt::get(TD->getIntPtrType(Context), 1), File);
447 if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
448 CI->setCallingConv(Fn->getCallingConv());
452 SimplifyFortifiedLibCalls::~SimplifyFortifiedLibCalls() { }
454 bool SimplifyFortifiedLibCalls::fold(CallInst *CI, const DataLayout *TD,
455 const TargetLibraryInfo *TLI) {
456 // We really need DataLayout for later.
457 if (!TD) return false;
460 Function *Callee = CI->getCalledFunction();
461 StringRef Name = Callee->getName();
462 FunctionType *FT = Callee->getFunctionType();
463 LLVMContext &Context = CI->getParent()->getContext();
466 if (Name == "__memcpy_chk") {
467 // Check if this has the right signature.
468 if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
469 !FT->getParamType(0)->isPointerTy() ||
470 !FT->getParamType(1)->isPointerTy() ||
471 FT->getParamType(2) != TD->getIntPtrType(Context) ||
472 FT->getParamType(3) != TD->getIntPtrType(Context))
475 if (isFoldable(3, 2, false)) {
476 B.CreateMemCpy(CI->getArgOperand(0), CI->getArgOperand(1),
477 CI->getArgOperand(2), 1);
478 replaceCall(CI->getArgOperand(0));
484 // Should be similar to memcpy.
485 if (Name == "__mempcpy_chk") {
489 if (Name == "__memmove_chk") {
490 // Check if this has the right signature.
491 if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
492 !FT->getParamType(0)->isPointerTy() ||
493 !FT->getParamType(1)->isPointerTy() ||
494 FT->getParamType(2) != TD->getIntPtrType(Context) ||
495 FT->getParamType(3) != TD->getIntPtrType(Context))
498 if (isFoldable(3, 2, false)) {
499 B.CreateMemMove(CI->getArgOperand(0), CI->getArgOperand(1),
500 CI->getArgOperand(2), 1);
501 replaceCall(CI->getArgOperand(0));
507 if (Name == "__memset_chk") {
508 // Check if this has the right signature.
509 if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
510 !FT->getParamType(0)->isPointerTy() ||
511 !FT->getParamType(1)->isIntegerTy() ||
512 FT->getParamType(2) != TD->getIntPtrType(Context) ||
513 FT->getParamType(3) != TD->getIntPtrType(Context))
516 if (isFoldable(3, 2, false)) {
517 Value *Val = B.CreateIntCast(CI->getArgOperand(1), B.getInt8Ty(),
519 B.CreateMemSet(CI->getArgOperand(0), Val, CI->getArgOperand(2), 1);
520 replaceCall(CI->getArgOperand(0));
526 if (Name == "__strcpy_chk" || Name == "__stpcpy_chk") {
527 // Check if this has the right signature.
528 if (FT->getNumParams() != 3 ||
529 FT->getReturnType() != FT->getParamType(0) ||
530 FT->getParamType(0) != FT->getParamType(1) ||
531 FT->getParamType(0) != Type::getInt8PtrTy(Context) ||
532 FT->getParamType(2) != TD->getIntPtrType(Context))
536 // If a) we don't have any length information, or b) we know this will
537 // fit then just lower to a plain st[rp]cpy. Otherwise we'll keep our
538 // st[rp]cpy_chk call which may fail at runtime if the size is too long.
539 // TODO: It might be nice to get a maximum length out of the possible
540 // string lengths for varying.
541 if (isFoldable(2, 1, true)) {
542 Value *Ret = EmitStrCpy(CI->getArgOperand(0), CI->getArgOperand(1), B, TD,
543 TLI, Name.substr(2, 6));
552 if (Name == "__strncpy_chk" || Name == "__stpncpy_chk") {
553 // Check if this has the right signature.
554 if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
555 FT->getParamType(0) != FT->getParamType(1) ||
556 FT->getParamType(0) != Type::getInt8PtrTy(Context) ||
557 !FT->getParamType(2)->isIntegerTy() ||
558 FT->getParamType(3) != TD->getIntPtrType(Context))
561 if (isFoldable(3, 2, false)) {
562 Value *Ret = EmitStrNCpy(CI->getArgOperand(0), CI->getArgOperand(1),
563 CI->getArgOperand(2), B, TD, TLI,
573 if (Name == "__strcat_chk") {
577 if (Name == "__strncat_chk") {