diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2020-06-24 10:40:02 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2020-06-24 10:41:04 +0200 |
| commit | 01e10b0ee77e82cb331414c569e02dc7a2c4999e (patch) | |
| tree | 4fd662b22fa60263df1fe1b0596242a88aa0655d /gcc/tree-vectorizer.c | |
| parent | f0008858dec9b16da153b948834abb20b9f1ab32 (diff) | |
| download | gcc-01e10b0ee77e82cb331414c569e02dc7a2c4999e.zip gcc-01e10b0ee77e82cb331414c569e02dc7a2c4999e.tar.gz gcc-01e10b0ee77e82cb331414c569e02dc7a2c4999e.tar.bz2 | |
fold-const: Fix A <= 0 ? A : -A folding [PR95810]
We folded A <= 0 ? A : -A into -ABS (A), which is for signed integral types
incorrect - can invoke on INT_MIN UB twice, once on ABS and once on its
negation.
The following patch fixes it by instead folding it to (type)-ABSU (A).
2020-06-24 Jakub Jelinek <jakub@redhat.com>
PR middle-end/95810
* fold-const.c (fold_cond_expr_with_comparison): Optimize
A <= 0 ? A : -A into (type)-absu(A) rather than -abs(A).
* gcc.dg/ubsan/pr95810.c: New test.
Diffstat (limited to 'gcc/tree-vectorizer.c')
0 files changed, 0 insertions, 0 deletions