[PATCH][2/3] Fix PR54733 Optimize endian independent load/store

[Thomas Preud'homme]

Please find attached the new version of this patch addressing all your comments.

ChangeLog are now as follows:

*** gcc/ChangeLog ***

2014-05-04  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 (find_bswap_load): New.
	(find_bswap_1): Add support for memory source.
	(find_bswap): Likewise.
	(execute_optimize_bswap): Likewise.

*** gcc/testsuite/ChangeLog ***

2014-05-04  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.
	* gcc.dg/optimize-bswaphi-1.c: Likewise.
	* gcc.dg/optimize-bswapsi-2.c: Likewise.
	* gcc.c-torture/execute/bswap-2.c: Likewise.

Ok for stage1? Note that I haven't commited part 1 despite your approval as I'm waiting for the other parts to be approved. I don't know if it's the usual procedure for patchset.

Best regards,

Thomas Preud'homme
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