diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 9d249cc..e7a4b8c 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -1129,10 +1129,14 @@ negate_expr_p (tree t) && TYPE_OVERFLOW_WRAPS (type)); case FIXED_CST: - case REAL_CST: case NEGATE_EXPR: return true; + case REAL_CST: + /* We want to canonicalize to positive real constants. Pretend + that only negative ones can be easily negated. */ + return REAL_VALUE_NEGATIVE (TREE_REAL_CST (t)); + case COMPLEX_CST: return negate_expr_p (TREE_REALPART (t)) && negate_expr_p (TREE_IMAGPART (t)); |