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Make SimplifyDemandedUseBits generate vector constants where

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appropriate.  Patch per report on llvmdev.  No testcase because the 
original report didn't come with a testcase, and I can't come up with a case
that actually fails.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77986 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2009-08-03 19:15:42 +00:00
parent 38c398808c
commit cdc0654b3e
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -1014,7 +1014,7 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
if ((DemandedMask & (RHSKnownZero|RHSKnownOne)) == DemandedMask) {
// all known
if ((RHSKnownOne & LHSKnownOne) == RHSKnownOne) {
Constant *AndC = ConstantInt::get(*Context,
Constant *AndC = ConstantInt::get(VTy,
~RHSKnownOne & DemandedMask);
Instruction *And =
BinaryOperator::CreateAnd(I->getOperand(0), AndC, "tmp");
@ -1407,7 +1407,7 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
// If the client is only demanding bits that we know, return the known
// constant.
if ((DemandedMask & (RHSKnownZero|RHSKnownOne)) == DemandedMask) {
Constant *C = ConstantInt::get(*Context, RHSKnownOne);
Constant *C = ConstantInt::get(VTy, RHSKnownOne);
if (isa<PointerType>(V->getType()))
C = ConstantExpr::getIntToPtr(C, V->getType());
return C;