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[Bug target/25199] crashing code output from -mtune=pentium4 but not -mtune=pentiumpro
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Aug 2008 06:54:32 -0000
- Subject: [Bug target/25199] crashing code output from -mtune=pentium4 but not -mtune=pentiumpro
- References: <bug-25199-8961@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #15 from pinskia at gcc dot gnu dot org 2008-08-29 06:54 -------
I think this testcase is too strict in some cases. With a modified compiler,
we get:
movb 123(%eax), %dl
movl %edx, %esi
...
movb 120(%eax), %al
movl %eax, %esi
Which is correct as far as I can tell, as we only say the lower half of %esi is
defined.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25199