diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-03-15 11:09:09 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-03-15 11:09:09 +0000 |
| commit | 2109076a7c746c9440693879afc55c19bd5a9240 (patch) | |
| tree | 676bfe35c1401333a3e6069eaf9dfdb1c6b71af8 /gcc/tree-ssa-dce.c | |
| parent | ac5ffdb47310eaaea04b1dbdf0181010bc2a806f (diff) | |
| download | gcc-2109076a7c746c9440693879afc55c19bd5a9240.tar.gz | |
2011-03-15 Richard Guenther <rguenther@suse.de>
PR tree-optimization/41490
* tree-ssa-dce.c (propagate_necessity): Handle returns without
value but with VUSE.
* tree-ssa-operands.c (parse_ssa_operands): Add a VUSE on all
return statements.
* tree-ssa-sink.c (statement_sink_location): Fix store sinking.
* tree-ssa-phiopt.c (tree_ssa_phiopt_worker): Handle virtual PHIs.
* tree-tailcall.c (find_tail_calls): Ignore returns.
* gcc.dg/tree-ssa/ssa-sink-6.c: New testcase.
* gcc.dg/tree-ssa/ssa-sink-7.c: Likewise.
* gcc.dg/tree-ssa/ssa-sink-8.c: Likewise.
* gcc.dg/tree-ssa/ssa-sink-9.c: Likewise.
* g++.dg/tree-ssa/pr33604.C: Adjust.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@170984 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index a9c886f0a8f..ce2d41bff31 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -869,7 +869,8 @@ propagate_necessity (struct edge_list *el) { tree rhs = gimple_return_retval (stmt); /* A return statement may perform a load. */ - if (TREE_CODE (rhs) != SSA_NAME + if (rhs + && TREE_CODE (rhs) != SSA_NAME && !is_gimple_min_invariant (rhs)) { if (!ref_may_be_aliased (rhs)) |