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| author | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2010-04-30 21:10:53 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2010-04-30 21:10:53 +0000 |
| commit | ce276b614cde941ac9bbc481e7ffd29e5e53b74d (patch) | |
| tree | 8b95fc1b108384f4752ddbc500a0c367f241fee9 /gcc/tree-ssa-loop-ivopts.c | |
| parent | 5cb6410a270421888033a4489c9f46d979324877 (diff) | |
| download | gcc-ce276b614cde941ac9bbc481e7ffd29e5e53b74d.zip gcc-ce276b614cde941ac9bbc481e7ffd29e5e53b74d.tar.gz gcc-ce276b614cde941ac9bbc481e7ffd29e5e53b74d.tar.bz2 | |
tree-ssa-loop-ivopts.c (may_be_unaligned_p): Check the alignment of the variable part of the offset as well.
* tree-ssa-loop-ivopts.c (may_be_unaligned_p): Check the alignment of
the variable part of the offset as well. Use highest_pow2_factor for
all alignment checks.
From-SVN: r158948
Diffstat (limited to 'gcc/tree-ssa-loop-ivopts.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index a1fdfa4..8662f4c 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -1536,16 +1536,18 @@ may_be_unaligned_p (tree ref, tree step) if (mode != BLKmode) { - double_int mul; - tree al = build_int_cst (TREE_TYPE (step), - GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT); + unsigned mode_align = GET_MODE_ALIGNMENT (mode); - if (base_align < GET_MODE_ALIGNMENT (mode) - || bitpos % GET_MODE_ALIGNMENT (mode) != 0 - || bitpos % BITS_PER_UNIT != 0) + if (base_align < mode_align + || (bitpos % mode_align) != 0 + || (bitpos % BITS_PER_UNIT) != 0) return true; - if (!constant_multiple_of (step, al, &mul)) + if (toffset + && (highest_pow2_factor (toffset) * BITS_PER_UNIT) < mode_align) + return true; + + if ((highest_pow2_factor (step) * BITS_PER_UNIT) < mode_align) return true; } |