Yingwei Zheng d085b42cbb [InstSimplify] Do not simplify freeze in simplifyWithOpReplaced (#91215) ...

See the LangRef:
> All uses of a value returned by the same ‘freeze’ instruction are
guaranteed to always observe the same value, while different ‘freeze’
instructions may yield different values.

It is incorrect to replace freezes with the simplified value.

Proof:
https://alive2.llvm.org/ce/z/3Dn9Cd
https://alive2.llvm.org/ce/z/Qyh5h6

Fixes https://github.com/llvm/llvm-project/issues/91178

2024-05-08 10:04:09 +08:00

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