[llvm] [InstCombine] Enable select freeze poison folding when storing value (PR #129776)

[Yingwei Zheng via llvm-commits]

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@@ -4842,8 +4847,11 @@ Instruction *InstCombinerImpl::visitFreeze(FreezeInst &I) {
 
   Constant *C;
   if (match(Op0, m_Constant(C)) && C->containsUndefOrPoisonElement()) {
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dtcxzyw wrote:

> the canonical form produced by InstCombinerImpl::visitFreeze occurs first and thus ruins the match on freeze poison when visitation is performed on the select instruction.

Should we remove these canonicalizations first?



https://github.com/llvm/llvm-project/pull/129776