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| author | Marek Polacek <polacek@redhat.com> | 2017-05-26 09:31:36 +0000 |
|---|---|---|
| committer | Marek Polacek <mpolacek@gcc.gnu.org> | 2017-05-26 09:31:36 +0000 |
| commit | 92f105f65dc6b370d098904c6726216c622cd64a (patch) | |
| tree | acc4df87aa5ee82ae9d6443013506dfff818fe46 /gcc/fold-const.c | |
| parent | 74ca4e36fbb3ac796f29ef4d72e3cd496064d168 (diff) | |
| download | gcc-92f105f65dc6b370d098904c6726216c622cd64a.zip gcc-92f105f65dc6b370d098904c6726216c622cd64a.tar.gz gcc-92f105f65dc6b370d098904c6726216c622cd64a.tar.bz2 | |
re PR sanitizer/80875 (UBSAN: compile time crash in fold_binary_loc at fold-const.c:9817)
PR sanitizer/80875
* fold-const.c (fold_binary_loc) <case MULT_EXPR>: Check if OP1
can be negated.
* c-c++-common/ubsan/pr80875.c: New test.
From-SVN: r248485
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index efc0b10..911ae36 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -9813,6 +9813,7 @@ fold_binary_loc (location_t loc, if (TREE_CODE (op1) == INTEGER_CST && tree_int_cst_sgn (op1) == -1 && negate_expr_p (op0) + && negate_expr_p (op1) && (tem = negate_expr (op1)) != op1 && ! TREE_OVERFLOW (tem)) return fold_build2_loc (loc, MULT_EXPR, type, |