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| author | Bill Schmidt <wschmidt@linux.ibm.com> | 2019-01-31 13:53:06 +0000 |
|---|---|---|
| committer | William Schmidt <wschmidt@gcc.gnu.org> | 2019-01-31 13:53:06 +0000 |
| commit | f942ef18b84ff6fd5774a606357e4ebcec120da3 (patch) | |
| tree | ea8d9d61e47ed8cccc6d197d579399e95932207f /gcc | |
| parent | 3a3f5dd1af1d3007c60ccbabf068a18039c6522c (diff) | |
| download | gcc-f942ef18b84ff6fd5774a606357e4ebcec120da3.zip gcc-f942ef18b84ff6fd5774a606357e4ebcec120da3.tar.gz gcc-f942ef18b84ff6fd5774a606357e4ebcec120da3.tar.bz2 | |
re PR middle-end/89008 (O2 and O1 results differ for simple test)
2018-01-31 Bill Schmidt <wschmidt@linux.ibm.com>
PR tree-optimization/89008
* gimple-ssa-strength-reduction.c (slsr_process_mul): Don't
process anything of the form X * 0.
From-SVN: r268422
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/gimple-ssa-strength-reduction.c | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d0ce117..56e13e8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-01-31 Bill Schmidt <wschmidt@linux.ibm.com> + + PR tree-optimization/89008 + * gimple-ssa-strength-reduction.c (slsr_process_mul): Don't + process anything of the form X * 0. + 2019-01-31 Richard Biener <rguenther@suse.de> PR tree-optimization/89135 diff --git a/gcc/gimple-ssa-strength-reduction.c b/gcc/gimple-ssa-strength-reduction.c index 82721a9..937a877 100644 --- a/gcc/gimple-ssa-strength-reduction.c +++ b/gcc/gimple-ssa-strength-reduction.c @@ -1268,7 +1268,7 @@ slsr_process_mul (gimple *gs, tree rhs1, tree rhs2, bool speed) c->next_interp = c2->cand_num; c2->first_interp = c->cand_num; } - else if (TREE_CODE (rhs2) == INTEGER_CST) + else if (TREE_CODE (rhs2) == INTEGER_CST && !integer_zerop (rhs2)) { /* Record an interpretation for the multiply-immediate. */ c = create_mul_imm_cand (gs, rhs1, rhs2, speed); |