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| author | Jeff Law <law@redhat.com> | 2015-10-02 13:31:46 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2015-10-02 13:31:46 -0600 |
| commit | 2671ee45bd0dcbc740cf292f10229be6c35c6e6a (patch) | |
| tree | b2ab53ebdd480f7c5adc6b55d7018c514f78bd66 /gcc/tree-ssa-dom.c | |
| parent | d4852cd492d78002c1a8e213ab858672ab54106e (diff) | |
| download | gcc-2671ee45bd0dcbc740cf292f10229be6c35c6e6a.zip gcc-2671ee45bd0dcbc740cf292f10229be6c35c6e6a.tar.gz gcc-2671ee45bd0dcbc740cf292f10229be6c35c6e6a.tar.bz2 | |
Re: [PATCH] Improve DOM's optimization of control statements
* tree-ssa-dom.c (optimize_stmt): Note when loop structures need
fixups.
From-SVN: r228415
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 a8b7038..d940816 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); |