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simplify 

llvm-svn: 30535
This commit is contained in:
Andrew Lenharth 2006-09-20 15:37:57 +00:00
parent f007f21c8a
commit 44cb67af5c
1 changed files with 8 additions and 12 deletions
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20
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
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@ -1603,18 +1603,14 @@ FoundSExt:
CI = dyn_cast<CastInst>(RHS);
Other = LHS;
}
if (CI) {
const Type *UIntPtrTy = TD->getIntPtrType();
const Type *SIntPtrTy = UIntPtrTy->getSignedVersion();
if((CI->getType() == UIntPtrTy || CI->getType() == SIntPtrTy)
&& isa<PointerType>(CI->getOperand(0)->getType())) {
Instruction* I2 = new CastInst(CI->getOperand(0),
PointerType::get(Type::SByteTy), "ctg", &I);
WorkList.push_back(I2);
I2 = new GetElementPtrInst(I2, Other, "ctg", &I);
WorkList.push_back(I2);
return new CastInst(I2, CI->getType());
}
if (CI && CI->getType()->isSized() &&
(CI->getType()->getPrimitiveSize() ==
TD->getIntPtrType()->getPrimitiveSize())
&& isa<PointerType>(CI->getOperand(0)->getType())) {
Value* I2 = InsertCastBefore(CI->getOperand(0),
PointerType::get(Type::SByteTy), I);
I2 = InsertNewInstBefore(new GetElementPtrInst(I2, Other, "ctg2"), I);
return new CastInst(I2, CI->getType());
}
}