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[Bug target/18019] [4.0 Regression] -march=pentium4 generates word fetch instead of byte fetch
- 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: 9 Nov 2004 04:50:44 -0000
- Subject: [Bug target/18019] [4.0 Regression] -march=pentium4 generates word fetch instead of byte fetch
- References: <20041015180025.18019.stuart@apple.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-11-09 04:50 -------
No this is not related to PR 17949 at all.
The behavior changed between 2004-01-18 and 2004-01-23.
Which means most likely this:
2004-01-19 Roger Sayle <roger@eyesopen.com>
* config/i386/i386.md (*movhi_1, *movqi_1): When optimizing for
size, don't use the larger zero-extending loads.
Roger this patch can cause bad code if done on a page boundary and the next page is protected.
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What |Removed |Added
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CC| |roger at eyesopen dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18019