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642290
2018 Jan 25
1
Late setting of SCEV NoWrap flags does bad with cache
...//reviews.llvm.org/D41578 “[SCEV] Do not cache S -> V if S is not equivalent of V”
* It’s committed. It can cause generation of redundant instructions. We’ve got regressions due to it. The biggest one is 7.31% regression in Spec2k6 401.bzip2 on Cortex-A57(AArch64).
https://reviews.llvm.org/D42290 “[SCEV] Clear poison flags during expansion of SCEV”
* This patch tries to fix regressions due to the D41578 patch.
Thanks,
Evgeny Astigeevich
From: llvm-dev <llvm-dev-bounces at lists.llvm.org> on behalf of Maxim Kazantsev via llvm-dev <llvm-dev at lists.llvm.org>
Reply-To: Maxi...