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Re: [Bug target/15551] [3.4/3.5? Regression] -mtune=pentium4 -O2
- From: Christopher Faylor <me at cgf dot cx>
- To: Kelley Cook <kcook at gcc dot gnu dot org>
- Cc: gcc-bugzilla at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org,Danny Smith <danny_r_smith_2001 at yahoo dot co dot nz>,Mark Mitchell <mark at codesourcery dot com>, rth at redhat dot com
- Date: Tue, 15 Jun 2004 13:42:05 -0400
- Subject: Re: [Bug target/15551] [3.4/3.5? Regression] -mtune=pentium4 -O2
- References: <ca43vg$bua$1@sea.gmane.org> <40C85859.5030005@gcc.gnu.org>
On Thu, Jun 10, 2004 at 08:47:21AM -0400, Kelley Cook wrote:
>I previously wrote
>>The patch also applies to 3.4 and passed an all languages bootstrap;
>>I'll also regtest it there.
>>
>>Mark, after a week on mainline, would this be OK for 3.4.1 assuming that
>>it also passes?
>>
>>2004-06-07 Kelley Cook <kcook@gcc.gnu.org>
>>
>> * config/i386/i386.c (ix86_expand_prologue): Mark win32 allocate insn
>> as prologue.
>> * config/i386/i386.md (allocate_stack): Clobber alloca memory.
>> (allocate_stack_worker_postreload): Likewise.
>> (allocate_stack_worker_rex64): Likewise.
>> (allocate_stack_worker_rex64_postreload): Likewise.
>> (allocate_stack_worker_1): Likewise.
>
>For what it is worth, on both mainline and 3.4.1 this patch, under
>pentium4-pc-cygwin, created no new regressions. Moreover, it fixed one of
>them:
>
>g77.f-torture/execute/labug1.f execution
>
>OK to install?
This doesn't seem to have been added yet.
I think this particular problem has been kicked around quite a bit in
various incarnations. I believe that this was code that Richard
Henderson added not so long ago. Maybe it would be a good idea to have
him verify that it is correct?
cgf