[llvm] [InstSimplify] Simplify select if it combinated `and/or/xor` (PR #73362)
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llvm-commits at lists.llvm.org
Sun Nov 26 12:10:39 PST 2023
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@@ -4572,12 +4614,37 @@ static Value *simplifySelectWithICmpCond(Value *CondVal, Value *TrueVal,
unsigned MaxRecurse) {
ICmpInst::Predicate Pred;
Value *CmpLHS, *CmpRHS;
+ const APInt *C;
if (!match(CondVal, m_ICmp(Pred, m_Value(CmpLHS), m_Value(CmpRHS))))
return nullptr;
if (Value *V = simplifyCmpSelOfMaxMin(CmpLHS, CmpRHS, Pred, TrueVal, FalseVal))
return V;
+ if (ICmpInst::isEquality(Pred) && match(CmpRHS, m_APInt(C)) &&
+ (C->isZero() | C->isOne())) {
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ParkHanbum wrote:
you are right I started with the i1 type in mind, but when I realized it could be applied to all types, I made an error expanding it.
https://github.com/llvm/llvm-project/pull/73362
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