[PATCH] Fix PR54733 Optimize endian independent load/store

[Thomas Preud'homme]

Sorry, took longer than expected as I got distracted by some other patch.
I merged the whole patchset in a single patch as I was told the current setup
is actually more difficult to read.

Here are the updated ChangeLogs:

*** gcc/ChangeLog ***

2014-05-09  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	PR tree-optimization/54733
	* expr.c (get_inner_reference): Add a parameter to control whether a
	MEM_REF should be split into base + offset.
	* tree.h (get_inner_reference): Default new parameter to false.
	* 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. Add assert when updating bswap_stats.

*** gcc/testsuite/ChangeLog ***

2014-05-09  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	PR tree-optimization/54733
	* 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.

Ok for trunk?

Best regards,

Thomas

> -----Original Message-----
> From: gcc-patches-owner@gcc.gnu.org [mailto:gcc-patches-
> owner@gcc.gnu.org] On Behalf Of Thomas Preud'homme
> Sent: Monday, May 05, 2014 7:30 PM
> To: GCC Patches
> Subject: RE: [PATCH][2/3] Fix PR54733 Optimize endian independent
> load/store
> 
> I found a way to improve the function find_bswap/find_bswap_or_nop
> and reduce its size. Please hold for the review, I will post an updated
> version as soon as I finish testing.
> 
> Best regards,
> 
> Thomas Preud'homme
> 
> 
> 
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