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[Bug tree-optimization/54733] Missing opportunity to optimize endian independent load/store
- From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 23 May 2014 03:34:01 +0000
- Subject: [Bug tree-optimization/54733] Missing opportunity to optimize endian independent load/store
- Auto-submitted: auto-generated
- References: <bug-54733-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54733
--- Comment #3 from thopre01 at gcc dot gnu.org ---
Author: thopre01
Date: Fri May 23 03:33:28 2014
New Revision: 210843
URL: http://gcc.gnu.org/viewcvs?rev=210843&root=gcc&view=rev
Log:
2014-05-23 Thomas Preud'homme <thomas.preudhomme@arm.com>
PR tree-optimization/54733
gcc/
* tree-ssa-math-opts.c (nop_stats): New "bswap_stats" structure.
(CMPNOP): Define.
(find_bswap_or_nop_load): New.
(find_bswap_1): Renamed to ...
(find_bswap_or_nop_1): This. Also add support for memory source.
(find_bswap): Renamed to ...
(find_bswap_or_nop): This. Also add support for memory source and
detection of bitwise operations equivalent to load in host endianness.
(execute_optimize_bswap): Likewise. Also move its leading comment back
in place and split statement transformation into ...
(bswap_replace): This.
gcc/testsuite
* gcc.dg/optimize-bswapdi-3.c: New test to check extension of bswap
optimization to support memory sources and bitwise operations
equivalent to load in host endianness.
* gcc.dg/optimize-bswaphi-1.c: Likewise.
* gcc.dg/optimize-bswapsi-2.c: Likewise.
* gcc.c-torture/execute/bswap-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/bswap-2.c
trunk/gcc/testsuite/gcc.dg/optimize-bswapdi-3.c
trunk/gcc/testsuite/gcc.dg/optimize-bswaphi-1.c
trunk/gcc/testsuite/gcc.dg/optimize-bswapsi-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-math-opts.c