[llvm] [InstCombine] Simplify select if it combinated and/or/xor (PR #73362)
via llvm-commits
llvm-commits at lists.llvm.org
Fri Mar 22 08:33:58 PDT 2024
================
@@ -1672,6 +1672,142 @@ static Value *foldSelectInstWithICmpConst(SelectInst &SI, ICmpInst *ICI,
return nullptr;
}
+static Instruction *foldSelectICmpEq(SelectInst &SI, ICmpInst *ICI,
+ InstCombinerImpl &IC) {
+ ICmpInst::Predicate Pred = ICI->getPredicate();
+ if (!ICmpInst::isEquality(Pred))
+ return nullptr;
+
+ Value *TrueVal = SI.getTrueValue();
+ Value *FalseVal = SI.getFalseValue();
+ Value *CmpLHS = ICI->getOperand(0);
+ Value *CmpRHS = ICI->getOperand(1);
+
+ if (Pred == ICmpInst::ICMP_NE) {
+ Pred = ICmpInst::ICMP_EQ;
----------------
goldsteinn wrote:
You never use `Pred` again
https://github.com/llvm/llvm-project/pull/73362
More information about the llvm-commits
mailing list