[llvm] [InstCombine] Reuse existing freeze when pushing freeze through a binop (PR #202306)

[Yuyang Zhang via llvm-commits]

yuyzhang512 wrote:

> Perhaps:
> 
> ```
> diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
> index 608966a5e928..568202d9f892 100644
> --- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
> +++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
> @@ -5394,6 +5394,10 @@ bool InstCombinerImpl::freezeOtherUses(FreezeInst &FI) {
>    });
> 
>    for (auto *U : Users) {
> +    auto *UI = cast<Instruction>(U);
> +    Worklist.pushUsersToWorkList(*UI);
> +    Worklist.push(UI);
> +
>      for (auto &AssumeVH : AC.assumptionsFor(U)) {
>        if (!AssumeVH)
>          continue;
> ```

I agree, this is better. Changed.

https://github.com/llvm/llvm-project/pull/202306