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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 | |
| parent | 6dfb83e8d8625c1845a3df51e5519d7904700add (diff) | |
| download | gcc-e729c8e003707934687e0da85e4b151a553a28d9.zip gcc-e729c8e003707934687e0da85e4b151a553a28d9.tar.gz gcc-e729c8e003707934687e0da85e4b151a553a28d9.tar.bz2 | |
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')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr83418.c | 17 | ||||
| -rw-r--r-- | gcc/vr-values.c | 7 |
4 files changed, 33 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 504b331..d182308 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +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. + 2017-12-14 Jakub Jelinek <jakub@redhat.com> PR bootstrap/83396 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ff37479..811568e 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-12-14 Richard Biener <rguenther@suse.de> + + PR tree-optimization/83418 + * gcc.dg/torture/pr83418.c: New testcase. + 2017-12-14 Jakub Jelinek <jakub@redhat.com> PR bootstrap/83396 diff --git a/gcc/testsuite/gcc.dg/torture/pr83418.c b/gcc/testsuite/gcc.dg/torture/pr83418.c new file mode 100644 index 0000000..b545a39 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr83418.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ + +void +yj (int j4) +{ + int t3; + + for (t3 = 0; t3 < 6; ++t3) + { + short int v4 = t3; + + if (v4 == j4 || v4 > t3) + for (;;) + { + } + } +} diff --git a/gcc/vr-values.c b/gcc/vr-values.c index 9352e12..794b463 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; |