Re: [PATCH] i386: Move vzeroupper pass from after reload pass to after postreload_cse [PR112760]

2023-12-05 Thread Hongtao Liu
On Wed, Dec 6, 2023 at 6:23 AM Jakub Jelinek wrote: > > Hi! > > Regardless of the outcome of the REG_UNUSED discussions, I think > it is a good idea to move the vzeroupper pass one pass later. > As can be seen in the multiple PRs and as postreload.cc documents, > reload/LRA is known to create dead

[PATCH] i386: Move vzeroupper pass from after reload pass to after postreload_cse [PR112760]

2023-12-05 Thread Jakub Jelinek
Hi! Regardless of the outcome of the REG_UNUSED discussions, I think it is a good idea to move the vzeroupper pass one pass later. As can be seen in the multiple PRs and as postreload.cc documents, reload/LRA is known to create dead statements quite often, which is the reason why we have postreloa