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| author | Jakub Jelinek <jakub@redhat.com> | 2017-10-14 20:47:14 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2017-10-14 20:47:14 +0200 |
| commit | cc453086d255f5443d956874c0a95877913c759f (patch) | |
| tree | b18c1cc33cf45585ac6de0923741e82e5015179b /gcc/tree-ssa-phiopt.c | |
| parent | 6af90df0e442b8317844bc5af96ecda4af4c2008 (diff) | |
| download | gcc-cc453086d255f5443d956874c0a95877913c759f.zip gcc-cc453086d255f5443d956874c0a95877913c759f.tar.gz gcc-cc453086d255f5443d956874c0a95877913c759f.tar.bz2 | |
re PR middle-end/62263 (Good codegen for bitwise rotate requires code that is technically undefined behavior)
PR middle-end/62263
PR middle-end/82498
* tree-ssa-forwprop.c (simplify_rotate): Allow def_arg1[N]
to be any operand_equal_p operands. For & (B - 1) require
B to be power of 2. Recognize
(X << (Y & (B - 1))) | (X >> ((-Y) & (B - 1))) and similar patterns.
* c-c++-common/rotate-5.c (f2): New function. Move old
function to ...
(f4): ... this. Use 127 instead of 128.
(f3, f5, f6): New functions.
(main): Test all f[1-6] functions, with both 0 and 1 as
second arguments.
* c-c++-common/rotate-6.c: New test.
* c-c++-common/rotate-6a.c: New test.
* c-c++-common/rotate-7.c: New test.
* c-c++-common/rotate-7a.c: New test.
* c-c++-common/rotate-8.c: New test.
From-SVN: r253760
Diffstat (limited to 'gcc/tree-ssa-phiopt.c')
0 files changed, 0 insertions, 0 deletions