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Make StripPointerCast a common function (should we mak it method of Value instead?)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50775 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov
2008-05-06 22:52:30 +00:00
parent f092b64a49
commit b04adddd50
9 changed files with 42 additions and 43 deletions
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lib/VMCore/Function.cpp
-24
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@@ -357,28 +357,4 @@ Function *Intrinsic::getDeclaration(Module *M, ID id, const Type **Tys,
getType(id, Tys, numTys)));
}
Value *IntrinsicInst::StripPointerCasts(Value *Ptr) {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ptr)) {
if (CE->getOpcode() == Instruction::BitCast) {
if (isa<PointerType>(CE->getOperand(0)->getType()))
return StripPointerCasts(CE->getOperand(0));
} else if (CE->getOpcode() == Instruction::GetElementPtr) {
for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
if (!CE->getOperand(i)->isNullValue())
return Ptr;
return StripPointerCasts(CE->getOperand(0));
}
return Ptr;
}
if (BitCastInst *CI = dyn_cast<BitCastInst>(Ptr)) {
if (isa<PointerType>(CI->getOperand(0)->getType()))
return StripPointerCasts(CI->getOperand(0));
} else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Ptr)) {
if (GEP->hasAllZeroIndices())
return StripPointerCasts(GEP->getOperand(0));
}
return Ptr;
}
// vim: sw=2 ai