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| author | Richard Kenner <kenner@gcc.gnu.org> | 1997-04-20 21:27:07 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1997-04-20 21:27:07 -0400 |
| commit | 3c9b009121d8d034401ad260359a8d1f80ef7a95 (patch) | |
| tree | 650ee01127ecc5bd9ad5c5363027d8a44e1f0685 /gcc | |
| parent | 116758a7279462ae7a8546c9c94a2de8efe08adf (diff) | |
| download | gcc-3c9b009121d8d034401ad260359a8d1f80ef7a95.zip gcc-3c9b009121d8d034401ad260359a8d1f80ef7a95.tar.gz gcc-3c9b009121d8d034401ad260359a8d1f80ef7a95.tar.bz2 | |
(operand_equal_p): Constants are not equal if there has been an overflow.
From-SVN: r13949
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/fold-const.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index f75d479..84e098a 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -1759,11 +1759,16 @@ operand_equal_p (arg0, arg1, only_const) switch (TREE_CODE (arg0)) { case INTEGER_CST: - return (TREE_INT_CST_LOW (arg0) == TREE_INT_CST_LOW (arg1) + return (! TREE_CONSTANT_OVERFLOW (arg0) + && ! TREE_CONSTANT_OVERFLOW (arg1) + && TREE_INT_CST_LOW (arg0) == TREE_INT_CST_LOW (arg1) && TREE_INT_CST_HIGH (arg0) == TREE_INT_CST_HIGH (arg1)); case REAL_CST: - return REAL_VALUES_EQUAL (TREE_REAL_CST (arg0), TREE_REAL_CST (arg1)); + return (! TREE_CONSTANT_OVERFLOW (arg0) + && ! TREE_CONSTANT_OVERFLOW (arg1) + && REAL_VALUES_EQUAL (TREE_REAL_CST (arg0), + TREE_REAL_CST (arg1))); case COMPLEX_CST: return (operand_equal_p (TREE_REALPART (arg0), TREE_REALPART (arg1), |