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add support for calloc to objectsize lowering

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156102 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nuno Lopes
2012-05-03 21:19:58 +00:00
parent 1d61f283fa
commit 252ef566e8
4 changed files with 88 additions and 5 deletions
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40
lib/Analysis/MemoryBuiltins.cpp
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@@ -180,6 +180,46 @@ Value *llvm::getMallocArraySize(CallInst *CI, const TargetData *TD,
return computeArraySize(CI, TD, LookThroughSExt);
}
//===----------------------------------------------------------------------===//
// clloc Call Utility Functions.
//
static bool isCallocCall(const CallInst *CI) {
if (!CI)
return false;
Function *Callee = CI->getCalledFunction();
if (Callee == 0 || !Callee->isDeclaration())
return false;
if (Callee->getName() != "calloc")
return false;
// Check malloc prototype.
// FIXME: workaround for PR5130, this will be obsolete when a nobuiltin
// attribute will exist.
FunctionType *FTy = Callee->getFunctionType();
return FTy->getReturnType() == Type::getInt8PtrTy(FTy->getContext()) &&
FTy->getNumParams() == 2 &&
((FTy->getParamType(0)->isIntegerTy(32) &&
FTy->getParamType(1)->isIntegerTy(32)) ||
(FTy->getParamType(0)->isIntegerTy(64) &&
FTy->getParamType(1)->isIntegerTy(64)));
}
/// extractCallocCall - Returns the corresponding CallInst if the instruction
/// is a calloc call.
const CallInst *llvm::extractCallocCall(const Value *I) {
const CallInst *CI = dyn_cast<CallInst>(I);
return isCallocCall(CI) ? CI : 0;
}
CallInst *llvm::extractCallocCall(Value *I) {
CallInst *CI = dyn_cast<CallInst>(I);
return isCallocCall(CI) ? CI : 0;
}
//===----------------------------------------------------------------------===//
// free Call Utility Functions.
//