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[Bug rtl-optimization/49095] Horrible code generation for trivial decrement with test
- 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: Sun, 29 May 2011 18:52:12 +0000
- Subject: [Bug rtl-optimization/49095] Horrible code generation for trivial decrement with test
- Auto-submitted: auto-generated
- References: <bug-49095-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49095
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-29 18:51:51 UTC ---
Author: jakub
Date: Sun May 29 18:51:48 2011
New Revision: 174413
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=174413
Log:
PR rtl-optimization/49095
* config/i386/predicates.md (plusminuslogic_operator): New predicate.
* config/i386/i386.md: Add peepholes for mem {+,-,&,|,^}= x; mem != 0.
* gcc.target/i386/pr49095.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr49095.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/config/i386/predicates.md
trunk/gcc/testsuite/ChangeLog