diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/vrp101.c | 13 | ||||
| -rw-r--r-- | gcc/tree-vrp.c | 3 |
4 files changed, 27 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5c3375e5..f0077b8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-06-14 Richard Biener <rguenther@suse.de> + + PR tree-optimization/71521 + * tree-vrp.c (extract_range_from_binary_expr_1): Guard + division int_const_binop against zero divisor. + 2016-06-13 Uros Bizjak <ubizjak@gmail.com> * config/i386/i386.md (signbittf2): New expander. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 45862f3..8763aad 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2016-06-14 Richard Biener <rguenther@suse.de> + + PR tree-optimization/71521 + * tree-vrp.c (extract_range_from_binary_expr_1): Guard + division int_const_binop against zero divisor. + 2016-06-13 Jakub Jelinek <jakub@redhat.com> PR sanitizer/71498 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp101.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp101.c new file mode 100644 index 0000000..cfca539 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp101.c @@ -0,0 +1,13 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ + +int x = 1; + +int main () +{ + int t = (1/(1>=x))>>1; + if (t != 0) __builtin_abort(); + return 0; +} + +/* { dg-final { scan-tree-dump "<bb 2>:\[\n\r \]*return 0;" "optimized" } } */ diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c index 68f2e90..ecfab1f 100644 --- a/gcc/tree-vrp.c +++ b/gcc/tree-vrp.c @@ -2938,7 +2938,8 @@ extract_range_from_binary_expr_1 (value_range *vr, and divisor are available. */ if (vr1.type == VR_RANGE && !symbolic_range_p (&vr0) - && !symbolic_range_p (&vr1)) + && !symbolic_range_p (&vr1) + && compare_values (vr1.max, zero) != 0) min = int_const_binop (code, vr0.min, vr1.max); else min = zero; |