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| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-10-02 19:31:46 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-10-02 19:31:46 +0000 |
| commit | 535d631e3bf9ade0626655ce99bae85db4d8da72 (patch) | |
| tree | b2ab53ebdd480f7c5adc6b55d7018c514f78bd66 /gcc/tree-ssa-dom.c | |
| parent | cba229716b3a369e96c71189d98a46ca3ada2717 (diff) | |
| download | gcc-535d631e3bf9ade0626655ce99bae85db4d8da72.tar.gz | |
Re: [PATCH] Improve DOM's optimization of control statements
* tree-ssa-dom.c (optimize_stmt): Note when loop structures need
fixups.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@228415 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-dom.c')
| -rw-r--r-- | gcc/tree-ssa-dom.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index a8b7038d73b..d9408165157 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -1843,6 +1843,12 @@ optimize_stmt (basic_block bb, gimple_stmt_iterator si, /* Delete threads that start at BB. */ remove_jump_threads_starting_at (bb); + /* If BB is in a loop, then removing an outgoing edge from BB + may cause BB to move outside the loop, changes in the + loop exit edges, etc. So note that loops need fixing. */ + if (bb_loop_depth (bb) > 0) + loops_state_set (LOOPS_NEED_FIXUP); + /* Now clean up the control statement at the end of BB and remove unexecutable edges. */ remove_ctrl_stmt_and_useless_edges (bb, taken_edge->dest); |