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List: gcc-bugs
Subject: [Bug rtl-optimization/63259] Detecting byteswap sequence
From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla () gcc ! gnu ! org>
Date: 2014-10-31 11:55:38
Message-ID: bug-63259-4-ha0VS2pzfy () http ! gcc ! gnu ! org/bugzilla/
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63259
--- Comment #5 from thopre01 at gcc dot gnu.org ---
Author: thopre01
Date: Fri Oct 31 11:55:07 2014
New Revision: 216971
URL: https://gcc.gnu.org/viewcvs?rev=216971&root=gcc&view=rev
Log:
2014-10-31 Thomas Preud'homme <thomas.preudhomme@arm.com>
gcc/
PR tree-optimization/63259
* tree-ssa-math-opts.c (bswap_replace): Replace expression by a
rotation left if it is a 16 bit byte swap.
(pass_optimize_bswap::execute): Also consider bswap in LROTATE_EXPR
and RROTATE_EXPR statements if it is a byte rotation.
gcc/testsuite/
PR tree-optimization/63259
* optimize-bswapsi-1.c (swap32_f): New bswap pass test.
* optimize-bswaphi-1.c: Drop useless SIType definition and fix typo in
following comment.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/optimize-bswaphi-1.c
trunk/gcc/testsuite/gcc.dg/optimize-bswapsi-1.c
trunk/gcc/tree-ssa-math-opts.c
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