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Lower stpcpy_chk when possible.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98274 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2010-03-11 19:24:34 +00:00
parent 55282267e1
commit 19888ca8b4
4 changed files with 45 additions and 6 deletions
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18
lib/Transforms/Utils/BuildLibCalls.cpp
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@ -87,6 +87,24 @@ Value *llvm::EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
return CI;
}
/// EmitStpCpy - Emit a call to the stpcpy function to the builder, for the
/// specified pointer arguments.
Value *llvm::EmitStpCpy(Value *Dst, Value *Src, IRBuilder<> &B,
const TargetData *TD) {
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 *StpCpy = M->getOrInsertFunction("stpcpy", AttrListPtr::get(AWI, 2),
I8Ptr, I8Ptr, I8Ptr, NULL);
CallInst *CI = B.CreateCall2(StpCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
"stpcpy");
if (const Function *F = dyn_cast<Function>(StpCpy->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,