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| author | Tom de Vries <tom@codesourcery.com> | 2017-07-03 07:23:01 +0000 |
|---|---|---|
| committer | Tom de Vries <vries@gcc.gnu.org> | 2017-07-03 07:23:01 +0000 |
| commit | be086ff50c79270411f14eec2d8f02c2b5bdb322 (patch) | |
| tree | f038f1c503a53f4a60143e9abf2edddf027f23d9 /gcc/tree-ssa-tail-merge.c | |
| parent | 4752be4637d8250516dc0d8171b797de2b413d81 (diff) | |
Ignore EDGE_{DFS_BACK,EXECUTABLE} in tail-merge
2017-07-03 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/69468
* tree-ssa-tail-merge.c (ignore_edge_flags): New constant.
(find_same_succ_bb): Handle ignore_edge_flags.
* gcc.dg/pr81192.c: Update.
From-SVN: r249895
Diffstat (limited to 'gcc/tree-ssa-tail-merge.c')
| -rw-r--r-- | gcc/tree-ssa-tail-merge.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-ssa-tail-merge.c b/gcc/tree-ssa-tail-merge.c index 6fa4e5b2ad9..b11911b7f1e 100644 --- a/gcc/tree-ssa-tail-merge.c +++ b/gcc/tree-ssa-tail-merge.c @@ -207,6 +207,8 @@ along with GCC; see the file COPYING3. If not see #include "tree-eh.h" #include "tree-cfgcleanup.h" +const int ignore_edge_flags = EDGE_DFS_BACK | EDGE_EXECUTABLE; + /* Describes a group of bbs with the same successors. The successor bbs are cached in succs, and the successor edge flags are cached in succ_flags. If a bb has the EDGE_TRUE/FALSE_VALUE flags swapped compared to succ_flags, @@ -707,7 +709,7 @@ find_same_succ_bb (basic_block bb, same_succ **same_p) { int index = e->dest->index; bitmap_set_bit (same->succs, index); - same_succ_edge_flags[index] = e->flags; + same_succ_edge_flags[index] = (e->flags & ~ignore_edge_flags); } EXECUTE_IF_SET_IN_BITMAP (same->succs, 0, j, bj) same->succ_flags.safe_push (same_succ_edge_flags[j]); |