Messages in this thread | | | Date | Thu, 25 Sep 2008 12:38:43 -0700 | From | Hiroshi Shimamoto <> | Subject | Re: [RFC PATCH v2 -tip 0/4] x86: signal handler improvement |
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H. Peter Anvin wrote: > Hiroshi Shimamoto wrote: >>> This is a gcc failure, and should be reported to the gcc people. >> Does this gcc failure mean unnecessary storing into stack? >> > > Yes, it should be able to process this in a register, instead of storing > to the stack and then merging later. > > It's possible it's trying to do that to hide latency, but that's clearly > a lose in this case.
OK, I'll test with some gcc versions. It's necessary to check outputs of the latest gcc, I think.
thanks, Hiroshi Shimamoto
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