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| author | Jakub Jelinek <jakub@redhat.com> | 2014-10-17 12:50:16 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2014-10-17 12:50:16 +0200 |
| commit | 4eb4a256cd4a39555f4d834c47cabc2e136ed02a (patch) | |
| tree | 57d50dcdf67827495420438304dc1e393caa452f /gcc/tree-ssa-reassoc.c | |
| parent | 9d4ded759a1367ebe6588be36d0ea1410e24e3ca (diff) | |
| download | gcc-4eb4a256cd4a39555f4d834c47cabc2e136ed02a.zip gcc-4eb4a256cd4a39555f4d834c47cabc2e136ed02a.tar.gz gcc-4eb4a256cd4a39555f4d834c47cabc2e136ed02a.tar.bz2 | |
re PR tree-optimization/63302 (Code with 64-bit long long constants is miscompiled on 32-bit host)
PR tree-optimization/63302
* tree-ssa-reassoc.c (optimize_range_tests_xor,
optimize_range_tests_diff): Use !integer_pow2p () instead of
tree_log2 () < 0.
* gcc.c-torture/execute/pr63302.c: New test.
From-SVN: r216391
Diffstat (limited to 'gcc/tree-ssa-reassoc.c')
| -rw-r--r-- | gcc/tree-ssa-reassoc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c index 4714a38..ac33f75 100644 --- a/gcc/tree-ssa-reassoc.c +++ b/gcc/tree-ssa-reassoc.c @@ -2200,7 +2200,7 @@ optimize_range_tests_xor (enum tree_code opcode, tree type, lowxor = fold_binary (BIT_XOR_EXPR, type, lowi, lowj); if (lowxor == NULL_TREE || TREE_CODE (lowxor) != INTEGER_CST) return false; - if (tree_log2 (lowxor) < 0) + if (!integer_pow2p (lowxor)) return false; highxor = fold_binary (BIT_XOR_EXPR, type, highi, highj); if (!tree_int_cst_equal (lowxor, highxor)) @@ -2247,7 +2247,7 @@ optimize_range_tests_diff (enum tree_code opcode, tree type, tem1 = fold_binary (MINUS_EXPR, type, lowj, lowi); if (tem1 == NULL_TREE || TREE_CODE (tem1) != INTEGER_CST) return false; - if (tree_log2 (tem1) < 0) + if (!integer_pow2p (tem1)) return false; type = unsigned_type_for (type); |