Here is the fourth and last patch in the series. Its purpose is to add support for bitwise operation from a source operand that are equivalent to a load in the target's endianness.
ChangeLog are as follows:
*** gcc/ChangeLog ***
2014-05-04 Thomas Preud'homme <thomas.preudho...@arm.com>
PR tree-optimization/54733
* tree-ssa-math-opts.c (nop_stats): New "bswap_stats" structure.
(CMPNOP): Define.
(find_bswap_load): Renamed to ...
(find_bswap_or_nop_load): This.
(find_bswap_1): Renamed to ...
(find_bswap_or_nop_1): This.
(find_bswap): Renamed to ...
(find_bswap_or_nop): This. Also add detection of bitwise operations
equivalent to load in host endianness.
(bswap_replace): Likewise.
(execute_optimize_bswap): Likewise.
*** gcc/testsuite/ChangeLog ***
2014-05-04 Thomas Preud'homme <thomas.preudho...@arm.com>
PR tree-optimization/54733
* gcc.dg/optimize-bswapdi-3.c: Extend test to check detection of
bitwise operation equivalent to load in host endianness.
* gcc.dg/optimize-bswaphi-1.c: Likewise.
* gcc.dg/optimize-bswapsi-2.c: Likewise.
gcc32rm-84.5.1.part4.diff
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