diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-12-14 11:12:52 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-12-14 11:12:52 +0000 |
| commit | 5ab8299a9a1caef535be3f93029a7f38d8007359 (patch) | |
| tree | ac22b820254a45fdcb0e1e51f9a7f08bf9f38e90 | |
| parent | 27c3c006f1c94e01a8170963ff7d84f4deb9471c (diff) | |
| download | gcc-5ab8299a9a1caef535be3f93029a7f38d8007359.tar.gz | |
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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@255628 138bc75d-0d04-0410-961f-82ee72b054a4
| -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 504b331ec8a..d18230841f4 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 ff3747961b5..811568e7d2a 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 00000000000..b545a39a803 --- /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 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; |