diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 6f829ad..0e74391 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -1537,6 +1537,16 @@ const_binop (enum tree_code code, tree arg1, tree arg2, int notrunc) inexact = real_arithmetic (&value, code, &d1, &d2); real_convert (&result, mode, &value); + /* Don't constant fold this floating point operation if + the result has overflowed and flag_trapping_math. */ + + if (flag_trapping_math + && MODE_HAS_INFINITIES (mode) + && REAL_VALUE_ISINF (result) + && !REAL_VALUE_ISINF (d1) + && !REAL_VALUE_ISINF (d2)) + return NULL_TREE; + /* Don't constant fold this floating point operation if the result may dependent upon the run-time rounding mode and flag_rounding_math is set, or if GCC's software emulation |