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| author | Richard Biener <rguenther@suse.de> | 2017-12-14 11:12:52 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-12-14 11:12:52 +0000 |
| commit | e729c8e003707934687e0da85e4b151a553a28d9 (patch) | |
| tree | ac22b820254a45fdcb0e1e51f9a7f08bf9f38e90 /gcc/vr-values.c | |
| parent | 6dfb83e8d8625c1845a3df51e5519d7904700add (diff) | |
| download | gcc-e729c8e003707934687e0da85e4b151a553a28d9.tar.gz | |
re PR tree-optimization/83418 (ICE in extract_range_for_var_from_comparison_expr, at vr-values.c:448)
2017-12-14 Richard Biener <rguenther@suse.de>
PR tree-optimization/83418
* vr-values.c (vr_values::extract_range_for_var_from_comparison_expr):
Instead of asserting we don't get unfolded comparisons deal with
them.
* gcc.dg/torture/pr83418.c: New testcase.
From-SVN: r255628
Diffstat (limited to 'gcc/vr-values.c')
| -rw-r--r-- | gcc/vr-values.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/vr-values.c b/gcc/vr-values.c index 9352e120d9d..794b4635f9e 100644 --- a/gcc/vr-values.c +++ b/gcc/vr-values.c @@ -445,11 +445,12 @@ vr_values::extract_range_for_var_from_comparison_expr (tree var, tree min, max, type; value_range *limit_vr; type = TREE_TYPE (var); - gcc_assert (limit != var); /* For pointer arithmetic, we only keep track of pointer equality - and inequality. */ - if (POINTER_TYPE_P (type) && cond_code != NE_EXPR && cond_code != EQ_EXPR) + and inequality. If we arrive here with unfolded conditions like + _1 > _1 do not derive anything. */ + if ((POINTER_TYPE_P (type) && cond_code != NE_EXPR && cond_code != EQ_EXPR) + || limit == var) { set_value_range_to_varying (vr_p); return; |