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[Bug rtl-optimization/70429] Wrong code with -O1.
- 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: Tue, 29 Mar 2016 18:49:32 +0000
- Subject: [Bug rtl-optimization/70429] Wrong code with -O1.
- Auto-submitted: auto-generated
- References: <bug-70429-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70429
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Mar 29 18:49:00 2016
New Revision: 234531
URL: https://gcc.gnu.org/viewcvs?rev=234531&root=gcc&view=rev
Log:
PR rtl-optimization/70429
* combine.c (simplify_shift_const_1): For ASHIFTRT don't optimize
(cst1 >> count) >> cst2 into (cst1 >> cst2) >> count if
mode != result_mode.
* gcc.c-torture/execute/pr70429.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr70429.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
trunk/gcc/testsuite/ChangeLog