#include "llvm/Type.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
+#include "llvm/Intrinsics.h"
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/Support/IRBuilder.h"
#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/LLVMContext.h"
#include "llvm/Intrinsics.h"
+#include "llvm/ADT/SmallString.h"
using namespace llvm;
AttributeWithIndex AWI =
AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind);
- const Type *I8Ptr = B.getInt8PtrTy();
- const Type *I32Ty = B.getInt32Ty();
+ Type *I8Ptr = B.getInt8PtrTy();
+ Type *I32Ty = B.getInt32Ty();
Constant *StrChr = M->getOrInsertFunction("strchr", AttrListPtr::get(&AWI, 1),
I8Ptr, I8Ptr, I32Ty, NULL);
CallInst *CI = B.CreateCall2(StrChr, CastToCStr(Ptr, B),
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 TargetData *TD) {
+ Module *M = B.GetInsertBlock()->getParent()->getParent();
+ AttributeWithIndex AWI[3];
+ AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
+ AWI[1] = AttributeWithIndex::get(2, Attribute::NoCapture);
+ AWI[2] = AttributeWithIndex::get(~0u, Attribute::ReadOnly |
+ Attribute::NoUnwind);
+
+ LLVMContext &Context = B.GetInsertBlock()->getContext();
+ Value *StrNCmp = M->getOrInsertFunction("strncmp", AttrListPtr::get(AWI, 3),
+ B.getInt32Ty(),
+ B.getInt8PtrTy(),
+ B.getInt8PtrTy(),
+ TD->getIntPtrType(Context), NULL);
+ CallInst *CI = B.CreateCall3(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,
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(2, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
- const Type *I8Ptr = B.getInt8PtrTy();
+ Type *I8Ptr = B.getInt8PtrTy();
Value *StrCpy = M->getOrInsertFunction(Name, AttrListPtr::get(AWI, 2),
I8Ptr, I8Ptr, I8Ptr, NULL);
CallInst *CI = B.CreateCall2(StrCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
/// 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 TargetData *TD) {
+ IRBuilder<> &B, const TargetData *TD, StringRef Name) {
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(2, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
- const Type *I8Ptr = B.getInt8PtrTy();
- Value *StrNCpy = M->getOrInsertFunction("strncpy", AttrListPtr::get(AWI, 2),
- I8Ptr, I8Ptr, I8Ptr,
- Len->getType(), NULL);
+ Type *I8Ptr = B.getInt8PtrTy();
+ Value *StrNCpy = M->getOrInsertFunction(Name, AttrListPtr::get(AWI, 2),
+ I8Ptr, I8Ptr, I8Ptr,
+ Len->getType(), NULL);
CallInst *CI = B.CreateCall3(StrNCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
Len, "strncpy");
if (const Function *F = dyn_cast<Function>(StrNCpy->stripPointerCasts()))
return CI;
}
-
-/// EmitMemCpy - Emit a call to the memcpy function to the builder. This always
-/// expects that Len has type 'intptr_t' and Dst/Src are pointers.
-Value *llvm::EmitMemCpy(Value *Dst, Value *Src, Value *Len,
- unsigned Align, IRBuilder<> &B, const TargetData *TD) {
- Module *M = B.GetInsertBlock()->getParent()->getParent();
- const Type *Ty = Len->getType();
- Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, &Ty, 1);
- Dst = CastToCStr(Dst, B);
- Src = CastToCStr(Src, B);
- return B.CreateCall4(MemCpy, Dst, Src, Len,
- ConstantInt::get(B.getInt32Ty(), Align));
-}
-
/// 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.
return CI;
}
-/// EmitMemMove - Emit a call to the memmove function to the builder. This
-/// always expects that the size has type 'intptr_t' and Dst/Src are pointers.
-Value *llvm::EmitMemMove(Value *Dst, Value *Src, Value *Len,
- unsigned Align, IRBuilder<> &B, const TargetData *TD) {
- Module *M = B.GetInsertBlock()->getParent()->getParent();
- LLVMContext &Context = B.GetInsertBlock()->getContext();
- const Type *Ty = TD->getIntPtrType(Context);
- Value *MemMove = Intrinsic::getDeclaration(M, Intrinsic::memmove, &Ty, 1);
- Dst = CastToCStr(Dst, B);
- Src = CastToCStr(Src, B);
- Value *A = ConstantInt::get(B.getInt32Ty(), Align);
- return B.CreateCall4(MemMove, Dst, Src, Len, A);
-}
-
/// 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,
return CI;
}
-/// EmitMemSet - Emit a call to the memset function
-Value *llvm::EmitMemSet(Value *Dst, Value *Val,
- Value *Len, IRBuilder<> &B, const TargetData *TD) {
- Module *M = B.GetInsertBlock()->getParent()->getParent();
- Intrinsic::ID IID = Intrinsic::memset;
- const Type *Tys[1];
- Tys[0] = Len->getType();
- Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 1);
- Value *Align = ConstantInt::get(B.getInt32Ty(), 1);
- return B.CreateCall4(MemSet, CastToCStr(Dst, B), Val, Len, Align);
-}
-
/// 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, const char *Name,
- IRBuilder<> &B, const AttrListPtr &Attrs) {
- char NameBuffer[20];
+Value *llvm::EmitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
+ const AttrListPtr &Attrs) {
+ SmallString<20> NameBuffer;
if (!Op->getType()->isDoubleTy()) {
// If we need to add a suffix, copy into NameBuffer.
- unsigned NameLen = strlen(Name);
- assert(NameLen < sizeof(NameBuffer)-2);
- memcpy(NameBuffer, Name, NameLen);
+ NameBuffer += Name;
if (Op->getType()->isFloatTy())
- NameBuffer[NameLen] = 'f'; // floorf
+ NameBuffer += 'f'; // floorf
else
- NameBuffer[NameLen] = 'l'; // floorl
- NameBuffer[NameLen+1] = 0;
+ NameBuffer += 'l'; // floorl
Name = NameBuffer;
}
/// EmitFPutS - Emit a call to the puts function. Str is required to be a
/// pointer and File is a pointer to FILE.
void llvm::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B,
- const TargetData *TD) {
+ const TargetData *TD, const TargetLibraryInfo *TLI) {
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[3];
AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(2, Attribute::NoCapture);
AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
+ StringRef FPutsName = TLI->getName(LibFunc::fputs);
Constant *F;
if (File->getType()->isPointerTy())
- F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3),
+ F = M->getOrInsertFunction(FPutsName, AttrListPtr::get(AWI, 3),
B.getInt32Ty(),
B.getInt8PtrTy(),
File->getType(), NULL);
else
- F = M->getOrInsertFunction("fputs", B.getInt32Ty(),
+ F = M->getOrInsertFunction(FPutsName, B.getInt32Ty(),
B.getInt8PtrTy(),
File->getType(), NULL);
CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs");
/// 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.
void llvm::EmitFWrite(Value *Ptr, Value *Size, Value *File,
- IRBuilder<> &B, const TargetData *TD) {
+ IRBuilder<> &B, const TargetData *TD,
+ const TargetLibraryInfo *TLI) {
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[3];
AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(4, Attribute::NoCapture);
AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
LLVMContext &Context = B.GetInsertBlock()->getContext();
+ StringRef FWriteName = TLI->getName(LibFunc::fwrite);
Constant *F;
if (File->getType()->isPointerTy())
- F = M->getOrInsertFunction("fwrite", AttrListPtr::get(AWI, 3),
+ F = M->getOrInsertFunction(FWriteName, AttrListPtr::get(AWI, 3),
TD->getIntPtrType(Context),
B.getInt8PtrTy(),
TD->getIntPtrType(Context),
TD->getIntPtrType(Context),
File->getType(), NULL);
else
- F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(Context),
+ F = M->getOrInsertFunction(FWriteName, TD->getIntPtrType(Context),
B.getInt8PtrTy(),
TD->getIntPtrType(Context),
TD->getIntPtrType(Context),
SimplifyFortifiedLibCalls::~SimplifyFortifiedLibCalls() { }
bool SimplifyFortifiedLibCalls::fold(CallInst *CI, const TargetData *TD) {
+ // We really need TargetData for later.
+ if (!TD) return false;
+
this->CI = CI;
- StringRef Name = CI->getCalledFunction()->getName();
- BasicBlock *BB = CI->getParent();
- IRBuilder<> B(CI->getParent()->getContext());
-
- // Set the builder to the instruction after the call.
- B.SetInsertPoint(BB, CI);
+ Function *Callee = CI->getCalledFunction();
+ StringRef Name = Callee->getName();
+ FunctionType *FT = Callee->getFunctionType();
+ LLVMContext &Context = CI->getParent()->getContext();
+ IRBuilder<> B(CI);
if (Name == "__memcpy_chk") {
- if (isFoldable(4, 3, false)) {
- EmitMemCpy(CI->getOperand(1), CI->getOperand(2), CI->getOperand(3),
- 1, B, TD);
- replaceCall(CI->getOperand(1));
+ // Check if this has the right signature.
+ if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
+ !FT->getParamType(0)->isPointerTy() ||
+ !FT->getParamType(1)->isPointerTy() ||
+ FT->getParamType(2) != TD->getIntPtrType(Context) ||
+ FT->getParamType(3) != TD->getIntPtrType(Context))
+ return false;
+
+ if (isFoldable(3, 2, false)) {
+ B.CreateMemCpy(CI->getArgOperand(0), CI->getArgOperand(1),
+ CI->getArgOperand(2), 1);
+ replaceCall(CI->getArgOperand(0));
return true;
}
return false;
}
if (Name == "__memmove_chk") {
- if (isFoldable(4, 3, false)) {
- EmitMemMove(CI->getOperand(1), CI->getOperand(2), CI->getOperand(3),
- 1, B, TD);
- replaceCall(CI->getOperand(1));
+ // Check if this has the right signature.
+ if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
+ !FT->getParamType(0)->isPointerTy() ||
+ !FT->getParamType(1)->isPointerTy() ||
+ FT->getParamType(2) != TD->getIntPtrType(Context) ||
+ FT->getParamType(3) != TD->getIntPtrType(Context))
+ return false;
+
+ if (isFoldable(3, 2, false)) {
+ B.CreateMemMove(CI->getArgOperand(0), CI->getArgOperand(1),
+ CI->getArgOperand(2), 1);
+ replaceCall(CI->getArgOperand(0));
return true;
}
return false;
}
if (Name == "__memset_chk") {
- if (isFoldable(4, 3, false)) {
- Value *Val = B.CreateIntCast(CI->getOperand(2), B.getInt8Ty(),
+ // Check if this has the right signature.
+ if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
+ !FT->getParamType(0)->isPointerTy() ||
+ !FT->getParamType(1)->isIntegerTy() ||
+ FT->getParamType(2) != TD->getIntPtrType(Context) ||
+ FT->getParamType(3) != TD->getIntPtrType(Context))
+ return false;
+
+ if (isFoldable(3, 2, false)) {
+ Value *Val = B.CreateIntCast(CI->getArgOperand(1), B.getInt8Ty(),
false);
- EmitMemSet(CI->getOperand(1), Val, CI->getOperand(3), B, TD);
- replaceCall(CI->getOperand(1));
+ B.CreateMemSet(CI->getArgOperand(0), Val, CI->getArgOperand(2), 1);
+ replaceCall(CI->getArgOperand(0));
return true;
}
return false;
}
if (Name == "__strcpy_chk" || Name == "__stpcpy_chk") {
+ // Check if this has the right signature.
+ if (FT->getNumParams() != 3 ||
+ FT->getReturnType() != FT->getParamType(0) ||
+ FT->getParamType(0) != FT->getParamType(1) ||
+ FT->getParamType(0) != Type::getInt8PtrTy(Context) ||
+ FT->getParamType(2) != TD->getIntPtrType(Context))
+ return 0;
+
+
// If a) we don't have any length information, or b) we know this will
// fit then just lower to a plain st[rp]cpy. Otherwise we'll keep our
// st[rp]cpy_chk call which may fail at runtime if the size is too long.
// TODO: It might be nice to get a maximum length out of the possible
// string lengths for varying.
- if (isFoldable(3, 2, true)) {
- Value *Ret = EmitStrCpy(CI->getOperand(1), CI->getOperand(2), B, TD,
+ if (isFoldable(2, 1, true)) {
+ Value *Ret = EmitStrCpy(CI->getArgOperand(0), CI->getArgOperand(1), B, TD,
Name.substr(2, 6));
replaceCall(Ret);
return true;
return false;
}
- if (Name == "__strncpy_chk") {
- if (isFoldable(4, 3, false)) {
- Value *Ret = EmitStrNCpy(CI->getOperand(1), CI->getOperand(2),
- CI->getOperand(3), B, TD);
+ if (Name == "__strncpy_chk" || Name == "__stpncpy_chk") {
+ // Check if this has the right signature.
+ if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
+ FT->getParamType(0) != FT->getParamType(1) ||
+ FT->getParamType(0) != Type::getInt8PtrTy(Context) ||
+ !FT->getParamType(2)->isIntegerTy() ||
+ FT->getParamType(3) != TD->getIntPtrType(Context))
+ return false;
+
+ if (isFoldable(3, 2, false)) {
+ Value *Ret = EmitStrNCpy(CI->getArgOperand(0), CI->getArgOperand(1),
+ CI->getArgOperand(2), B, TD, Name.substr(2, 7));
replaceCall(Ret);
return true;
}
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