| commit | e5c957b427075452786ddd4fda684fd27cffafc0 | |
| author | wilco <wilco@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Tue, 28 Jun 2016 13:57:47 +0000 (28 13:57 +0000) | ||
| committer | wilco <wilco@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Tue, 28 Jun 2016 13:57:47 +0000 (28 13:57 +0000) | ||
| tree | c094454f4fad5edb0815ce22ddd5ab07dd9d866e | treesnapshot (tar.gz zip) |
| parent | c7b3bdc885c8a0f6f7157e781a881c55c6cf3b30 | commitdiff |
This patch fixes a bug in the bswap pass. In big-endian BIT_FIELD_REF uses
big-endian bit numbering so we need to adjust the bit position.
The existing version could potentially generate incorrect code however GCC
doesn't emit a BIT_FIELD_REF to access the low byte in a register, so the
symbolic number never matches in big-endian.
gcc/
* tree-ssa-math-opts.c (find_bswap_or_nop_1): Adjust bitnumbering
for big-endian BIT_FIELD_REF.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@237822 138bc75d-0d04-0410-961f-82ee72b054a4
big-endian bit numbering so we need to adjust the bit position.
The existing version could potentially generate incorrect code however GCC
doesn't emit a BIT_FIELD_REF to access the low byte in a register, so the
symbolic number never matches in big-endian.
gcc/
* tree-ssa-math-opts.c (find_bswap_or_nop_1): Adjust bitnumbering
for big-endian BIT_FIELD_REF.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@237822 138bc75d-0d04-0410-961f-82ee72b054a4
| gcc/ChangeLog | diffblobblamehistory | |
| gcc/tree-ssa-math-opts.c | diffblobblamehistory |