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[Bug rtl-optimization/80425] Extra inter-unit register move with zero-extension
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 15 May 2017 19:21:25 +0000
- Subject: [Bug rtl-optimization/80425] Extra inter-unit register move with zero-extension
- Auto-submitted: auto-generated
- References: <bug-80425-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80425
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Author: uros
Date: Mon May 15 19:04:35 2017
New Revision: 248070
URL: https://gcc.gnu.org/viewcvs?rev=248070&root=gcc&view=rev
Log:
* config/i386.i386.md (*zero_extendsidi2): Do not penalize
non-interunit SSE move alternatives with '?'.
(zero-extendsidi peephole2): New peephole to skip intermediate
general register in SSE zero-extend sequence.
testsuite/ChangeLog:
* gcc.target/i386/pr80425-1.c: New test.
* gcc.target/i386/pr80425-2.c: Ditto.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80425-1.c
trunk/gcc/testsuite/gcc.target/i386/pr80425-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog