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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 | |
| 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
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/fold-const.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/c-c++-common/ubsan/pr80875.c | 9 |
4 files changed, 21 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f281611..f926e9d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-05-26 Marek Polacek <polacek@redhat.com> + + PR sanitizer/80875 + * fold-const.c (fold_binary_loc) <case MULT_EXPR>: Check if OP1 + can be negated. + 2017-05-26 Richard Biener <rguenther@suse.de> PR tree-optimization/80842 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, diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index b2fc5b6..8d2e7de 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-05-26 Marek Polacek <polacek@redhat.com> + + PR sanitizer/80875 + * c-c++-common/ubsan/pr80875.c: New test. + 2017-05-26 Tom de Vries <tom@codesourcery.com> PR testsuite/80557 diff --git a/gcc/testsuite/c-c++-common/ubsan/pr80875.c b/gcc/testsuite/c-c++-common/ubsan/pr80875.c new file mode 100644 index 0000000..e679452 --- /dev/null +++ b/gcc/testsuite/c-c++-common/ubsan/pr80875.c @@ -0,0 +1,9 @@ +/* PR sanitizer/80875 */ +/* { dg-do compile } */ +/* { dg-options "-fsanitize=undefined" } */ + +int +foo (void) +{ + return ~__INT_MAX__ * (0 / 0); /* { dg-warning "division by zero" } */ +} |