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| author | Richard Biener <rguenther@suse.de> | 2015-01-22 16:07:36 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-01-22 16:07:36 +0000 |
| commit | f4b05e74683b0fbb323606875010006ee0dc557e (patch) | |
| tree | 6606604045ae104f5614d2103de2594f53f0f248 /gcc/tree-ssa-coalesce.c | |
| parent | 98321768552dffe06a24315a06df5ac18d8d0bd8 (diff) | |
| download | gcc-f4b05e74683b0fbb323606875010006ee0dc557e.zip gcc-f4b05e74683b0fbb323606875010006ee0dc557e.tar.gz gcc-f4b05e74683b0fbb323606875010006ee0dc557e.tar.bz2 | |
re PR tree-optimization/64728 (internal compiler error: SSA corruption)
2015-01-22 Richard Biener <rguenther@suse.de>
PR middle-end/64728
* tree-ssa-coalesce.c (coalesce_partitions): Do not perform
abnormal coalescing on undefined SSA names.
* gcc.dg/torture/pr64728.c: New testcase.
From-SVN: r220003
Diffstat (limited to 'gcc/tree-ssa-coalesce.c')
| -rw-r--r-- | gcc/tree-ssa-coalesce.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/tree-ssa-coalesce.c b/gcc/tree-ssa-coalesce.c index fda79dc..be696fe 100644 --- a/gcc/tree-ssa-coalesce.c +++ b/gcc/tree-ssa-coalesce.c @@ -1213,8 +1213,13 @@ coalesce_partitions (var_map map, ssa_conflicts_p graph, coalesce_list_p cl, gsi_next (&gsi)) { gphi *phi = gsi.phi (); + tree arg = PHI_ARG_DEF (phi, e->dest_idx); + if (SSA_NAME_IS_DEFAULT_DEF (arg) + && (!SSA_NAME_VAR (arg) + || TREE_CODE (SSA_NAME_VAR (arg)) != PARM_DECL)) + continue; + tree res = PHI_RESULT (phi); - tree arg = PHI_ARG_DEF (phi, e->dest_idx); int v1 = SSA_NAME_VERSION (res); int v2 = SSA_NAME_VERSION (arg); |