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| author | Richard Guenther <rguenther@suse.de> | 2010-05-14 20:18:34 +0000 |
|---|---|---|
| committer | Richard Guenther <rguenther@suse.de> | 2010-05-14 20:18:34 +0000 |
| commit | 148d699073f334fc7fefcf42668526e342bef8c6 (patch) | |
| tree | 3987bfabfa6a62defbc460cffd508dc3fdc78201 /gcc/tree-ssa-pre.c | |
| parent | 80107a3d5b1e76925f75c27424298ff4fc9e9ac5 (diff) | |
2010-05-14 Richard Guenther <rguenther@suse.de>
PR tree-optimization/44119
* tree-ssa-pre.c (eliminate): Properly mark replacement of
a PHI node necessary.
* gcc.c-torture/compile/pr44119.c: New testcase.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@159412 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index ac676cd4150..816aeb6af6f 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -4347,6 +4347,10 @@ eliminate (void) remove_phi_node (&gsi, false); + if (!bitmap_bit_p (inserted_exprs, SSA_NAME_VERSION (res)) + && TREE_CODE (sprime) == SSA_NAME) + gimple_set_plf (SSA_NAME_DEF_STMT (sprime), NECESSARY, true); + if (!useless_type_conversion_p (TREE_TYPE (res), TREE_TYPE (sprime))) sprime = fold_convert (TREE_TYPE (res), sprime); stmt = gimple_build_assign (res, sprime); |