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| author | Richard Biener <rguenther@suse.de> | 2015-05-12 13:28:33 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-05-12 13:28:33 +0000 |
| commit | 7e37fe6f628dc0063a36fbed59a2dcf74e88cce5 (patch) | |
| tree | f486f78e5f57c2fb12fcb8b4580366a8208a78fc /gcc/tree-ssa-dce.c | |
| parent | caf07df9db933fc7c97c41060dfa940fa78bb345 (diff) | |
| download | gcc-7e37fe6f628dc0063a36fbed59a2dcf74e88cce5.zip gcc-7e37fe6f628dc0063a36fbed59a2dcf74e88cce5.tar.gz gcc-7e37fe6f628dc0063a36fbed59a2dcf74e88cce5.tar.bz2 | |
re PR tree-optimization/66101 (internal compiler error: in verify_loop_structure, at cfgloop.c:1662)
2015-05-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/66101
* tree-ssa-dce.c (remove_dead_stmt): Properly mark loops for
fixup if we turn a loop exit edge to a fallthru edge.
* gcc.dg/torture/pr66101.c: New testcase.
From-SVN: r223065
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index c9cb0e4..df30614 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -1149,7 +1149,12 @@ remove_dead_stmt (gimple_stmt_iterator *i, basic_block bb) if (e != e2) { cfg_altered = true; - remove_edge (e2); + /* If we made a BB unconditionally exit a loop then this + transform alters the set of BBs in the loop. Schedule + a fixup. */ + if (loop_exit_edge_p (bb->loop_father, e)) + loops_state_set (LOOPS_NEED_FIXUP); + remove_edge (e2); } else ei_next (&ei); |