diff options
| author | dnovillo <dnovillo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-11-17 21:07:03 +0000 |
|---|---|---|
| committer | dnovillo <dnovillo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-11-17 21:07:03 +0000 |
| commit | ef88e2769858fe73c145cf38d7295d6293c322c0 (patch) | |
| tree | 337a05ea5b2fb625155a270527aab5e2894f68d0 | |
| parent | f75ffe10e06fb74e0d5728c12426dc8804c95978 (diff) | |
| download | ppe42-gcc-ef88e2769858fe73c145cf38d7295d6293c322c0.tar.gz ppe42-gcc-ef88e2769858fe73c145cf38d7295d6293c322c0.zip | |
PR tree-optimization/18307
* tree-ssa-alias.c (merge_pointed_to_info): ICE if 'dest' and
'orig' are the same node.
(collect_points_to_info_r): Do not call merge_pointed_to_info
when the PHI argument is identical to the LHS.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@90816 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/tree-ssa-alias.c | 12 |
2 files changed, 13 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 932744504a1..6bf212a17f0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2004-11-17 Diego Novillo <dnovillo@redhat.com> + + PR tree-optimization/18307 + * tree-ssa-alias.c (merge_pointed_to_info): ICE if 'dest' and + 'orig' are the same node. + (collect_points_to_info_r): Do not call merge_pointed_to_info + when the PHI argument is identical to the LHS. + 2004-11-17 Steven Bosscher <stevenb@suse.de> * tree-ssa-propagate.c (cfg_blocks_add) Assert we're not trying diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 2da76ce6bb5..aee68d3c58c 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -1697,12 +1697,8 @@ merge_pointed_to_info (struct alias_info *ai, tree dest, tree orig) { struct ptr_info_def *dest_pi, *orig_pi; - /* FIXME: It is erroneous to call this function with identical - nodes, however that currently occurs during bootstrap. This check - stops further breakage. PR 18307 documents the issue. */ - if (dest == orig) - return; - + gcc_assert (dest != orig); + /* Make sure we have points-to information for ORIG. */ collect_points_to_info_for (ai, orig); @@ -1938,7 +1934,9 @@ collect_points_to_info_r (tree var, tree stmt, void *data) break; case SSA_NAME: - merge_pointed_to_info (ai, lhs, var); + /* Avoid unnecessary merges. */ + if (lhs != var) + merge_pointed_to_info (ai, lhs, var); break; default: |
