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| author | Marc Glisse <marc.glisse@inria.fr> | 2012-08-02 21:54:43 +0200 |
|---|---|---|
| committer | Marc Glisse <glisse@gcc.gnu.org> | 2012-08-02 19:54:43 +0000 |
| commit | 77b5132f66c51aa41245f9b9f110141bd1629df5 (patch) | |
| tree | 9870c86ac51cc17871ae568aecaada69d0859f38 /gcc/fold-const.c | |
| parent | c2381fb2f0715cf5f0f313bc0766d73c2f7b99e7 (diff) | |
| download | gcc-77b5132f66c51aa41245f9b9f110141bd1629df5.zip gcc-77b5132f66c51aa41245f9b9f110141bd1629df5.tar.gz gcc-77b5132f66c51aa41245f9b9f110141bd1629df5.tar.bz2 | |
re PR tree-optimization/53805 (combine_comparisons changes trapping behavior)
2012-08-02 Marc Glisse <marc.glisse@inria.fr>
PR tree-optimization/53805
* gcc/fold-const.c (invert_tree_comparison): Invert ORDERED_EXPR and
UNORDERED_EXPR even for trapping floating point.
* gcc/testsuite/gcc.dg/fold-notunord.c: New testcase.
From-SVN: r190100
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index c136960..dfc01cc 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -2094,12 +2094,14 @@ pedantic_non_lvalue_loc (location_t loc, tree x) /* Given a tree comparison code, return the code that is the logical inverse. It is generally not safe to do this for floating-point comparisons, except - for EQ_EXPR and NE_EXPR, so we return ERROR_MARK in this case. */ + for EQ_EXPR, NE_EXPR, ORDERED_EXPR and UNORDERED_EXPR, so we return + ERROR_MARK in this case. */ enum tree_code invert_tree_comparison (enum tree_code code, bool honor_nans) { - if (honor_nans && flag_trapping_math && code != EQ_EXPR && code != NE_EXPR) + if (honor_nans && flag_trapping_math && code != EQ_EXPR && code != NE_EXPR + && code != ORDERED_EXPR && code != UNORDERED_EXPR) return ERROR_MARK; switch (code) |