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Re: [Bug target/15551] [3.4/3.5? Regression] -mtune=pentium4 -O2

From: Kelley Cook <kcook at gcc dot gnu dot org>
To: gcc-bugzilla at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Cc: Danny Smith <danny_r_smith_2001 at yahoo dot co dot nz>, Mark Mitchell <mark at codesourcery dot com>
Date: Thu, 10 Jun 2004 08:47:21 -0400
Subject: Re: [Bug target/15551] [3.4/3.5? Regression] -mtune=pentium4 -O2
Hop-count: 1
References: <ca43vg$bua$1@sea.gmane.org>

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?

Follow-Ups:
- Re: [Bug target/15551] [3.4/3.5? Regression] -mtune=pentium4 -O2
  - From: Christopher Faylor

References:
- Re: [Bug target/15551] [3.4/3.5? Regression] -mtune=pentium4 -O2with sjlj EH breaks stack probe worker on windows32 targets
  - From: Kelley Cook

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