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[Bug tree-optimization/52171] memcmp/strcmp/strncmp can be optimized when the result is tested for [in]equality with 0
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 08 Feb 2012 13:50:18 +0000
- Subject: [Bug tree-optimization/52171] memcmp/strcmp/strncmp can be optimized when the result is tested for [in]equality with 0
- Auto-submitted: auto-generated
- References: <bug-52171-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52171
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-02-08 13:50:18 UTC ---
IMHO you should also handle the case when one of the operand is STRING_CST,
then you don't need to test its alignment, you compare the memory content with
something read from the string at compile time.