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| author | Diego Novillo <dnovillo@redhat.com> | 2004-11-17 21:07:03 +0000 |
|---|---|---|
| committer | Diego Novillo <dnovillo@gcc.gnu.org> | 2004-11-17 16:07:03 -0500 |
| commit | 730bddf26ca4e5222b4130535b6bc705943f5d8b (patch) | |
| tree | 337a05ea5b2fb625155a270527aab5e2894f68d0 /gcc/tree-ssa-alias.c | |
| parent | 7c278f7987584a3371136b2812771427340df606 (diff) | |
| download | gcc-730bddf26ca4e5222b4130535b6bc705943f5d8b.zip gcc-730bddf26ca4e5222b4130535b6bc705943f5d8b.tar.gz gcc-730bddf26ca4e5222b4130535b6bc705943f5d8b.tar.bz2 | |
re PR tree-optimization/18307 (merge_pointed_to_info called incorrectly)
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.
From-SVN: r90816
Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 2da76ce..aee68d3 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: |