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[Bug target/34501] The vector cost model does not seem suited for Intel Core2Duo
- From: "howarth at nitro dot med dot uc dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 9 May 2010 16:10:24 -0000
- Subject: [Bug target/34501] The vector cost model does not seem suited for Intel Core2Duo
- References: <bug-34501-12313@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from howarth at nitro dot med dot uc dot edu 2010-05-09 16:10 -------
It appears that r159202 (for gcc trunk) and r159203 (for gcc-4_5-branch) has
escalated this problem by defaulting some chipsets to the core2 tuning. PR34501
should be bumped to a P1 for both gcc trunk and gcc-4_5-branch to make sure it
gets fixed before the next releases. Otherwise users of Nehalem, Westmere,
Penryn and Merom class processors will find their default code generation
pessimized.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34501