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minor cleanups 

llvm-svn: 63477
This commit is contained in:
Chris Lattner 2009-01-31 07:26:06 +00:00
parent 94cfb281c3
commit 585cfb2ce7
1 changed files with 3 additions and 3 deletions
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6
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
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@ -766,7 +766,7 @@ static void ComputeUnsignedMinMaxValuesFromKnownBits(const Type *Ty,
/// in DemandedMask. Note also that the bitwidth of V, DemandedMask, KnownZero
/// and KnownOne must all be the same.
bool InstCombiner::SimplifyDemandedBits(Value *V, APInt DemandedMask,
APInt& KnownZero, APInt& KnownOne,
APInt &KnownZero, APInt &KnownOne,
unsigned Depth) {
assert(V != 0 && "Null pointer of Value???");
assert(Depth <= 6 && "Limit Search Depth");
@ -784,7 +784,7 @@ bool InstCombiner::SimplifyDemandedBits(Value *V, APInt DemandedMask,
return false;
}
KnownZero.clear();
KnownZero.clear();
KnownOne.clear();
if (!V->hasOneUse()) { // Other users may use these bits.
if (Depth != 0) { // Not at the root.
@ -796,7 +796,7 @@ bool InstCombiner::SimplifyDemandedBits(Value *V, APInt DemandedMask,
// just set the DemandedMask to all bits.
DemandedMask = APInt::getAllOnesValue(BitWidth);
} else if (DemandedMask == 0) { // Not demanding any bits from V.
if (V != UndefValue::get(VTy))
if (!isa<UndefValue>(V))
return UpdateValueUsesWith(V, UndefValue::get(VTy));
return false;
} else if (Depth == 6) { // Limit search depth.