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[Bug target/85323] SSE/AVX/AVX512 shift by 0 not optimized away
- 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: Thu, 17 May 2018 09:55:08 +0000
- Subject: [Bug target/85323] SSE/AVX/AVX512 shift by 0 not optimized away
- Auto-submitted: auto-generated
- References: <bug-85323-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85323
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu May 17 09:54:36 2018
New Revision: 260311
URL: https://gcc.gnu.org/viewcvs?rev=260311&root=gcc&view=rev
Log:
PR target/85323
* config/i386/i386.c: Include tree-vector-builder.h.
(ix86_vector_shift_count): New function.
(ix86_fold_builtin): Fold shift builtins by scalar count.
(ix86_gimple_fold_builtin): Likewise.
* gcc.target/i386/pr85323-1.c: New test.
* gcc.target/i386/pr85323-2.c: New test.
* gcc.target/i386/pr85323-3.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr85323-1.c
trunk/gcc/testsuite/gcc.target/i386/pr85323-2.c
trunk/gcc/testsuite/gcc.target/i386/pr85323-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog