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| author | Kaveh R. Ghazi <ghazi@caip.rutgers.edu> | 2007-06-12 16:28:01 +0000 |
|---|---|---|
| committer | Kaveh Ghazi <ghazi@gcc.gnu.org> | 2007-06-12 16:28:01 +0000 |
| commit | 52a39a4c5db03b2e614f4bde1632e025348d1ebe (patch) | |
| tree | b55b0e708825d64adcda26d97ed19745dc046ede /gcc/fold-const.c | |
| parent | 1c2abe5e5ca716e91b6c6befc9551c48c03a10ff (diff) | |
| download | gcc-52a39a4c5db03b2e614f4bde1632e025348d1ebe.zip gcc-52a39a4c5db03b2e614f4bde1632e025348d1ebe.tar.gz gcc-52a39a4c5db03b2e614f4bde1632e025348d1ebe.tar.bz2 | |
fold-const.c (fold_binary): Guard (X-X) -> 0 transformation with !HONOR_NANS and !HONOR_INFINITIES.
* fold-const.c (fold_binary): Guard (X-X) -> 0 transformation
with !HONOR_NANS and !HONOR_INFINITIES.
* simplify-rtx.c (simplify_binary_operation_1): Likewise.
From-SVN: r125652
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 06b7c74..814d033 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -9585,7 +9585,10 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1) Also note that operand_equal_p is always false if an operand is volatile. */ - if ((! FLOAT_TYPE_P (type) || flag_unsafe_math_optimizations) + if ((! FLOAT_TYPE_P (type) + || (flag_unsafe_math_optimizations + && !HONOR_NANS (TYPE_MODE (type)) + && !HONOR_INFINITIES (TYPE_MODE (type)))) && operand_equal_p (arg0, arg1, 0)) return fold_convert (type, integer_zero_node); |