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[Bug middle-end/52691] [4.7/4.8 Regression] va_start to builtin_next_arg optimization lost
- 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, 28 Mar 2012 14:49:40 +0000
- Subject: [Bug middle-end/52691] [4.7/4.8 Regression] va_start to builtin_next_arg optimization lost
- Auto-submitted: auto-generated
- References: <bug-52691-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52691
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-28 14:49:40 UTC ---
Author: jakub
Date: Wed Mar 28 14:49:26 2012
New Revision: 185918
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185918
Log:
PR middle-end/52691
* tree-ssa-ccp.c (optimize_stdarg_builtin): Optimize
__builtin_va_start to __builtin_next_arg if the latter is
builtin_decl_explicit_p rather than when it is not.
* gcc.dg/pr52691.c: New test.
Added:
branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/pr52691.c
Modified:
branches/gcc-4_7-branch/gcc/ChangeLog
branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
branches/gcc-4_7-branch/gcc/tree-ssa-ccp.c