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| author | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-12-27 19:51:17 +0000 |
|---|---|---|
| committer | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-12-27 19:51:17 +0000 |
| commit | eed31a1178e92a2e5f024e099ff884dfc7bd24ff (patch) | |
| tree | c1ac3d0e9b92e39c461d328f289b2cec68f64955 /gcc/loop-unswitch.c | |
| parent | d67c9ae038e5880159d906e1edcfc0120bfa4e00 (diff) | |
| download | ppe42-gcc-eed31a1178e92a2e5f024e099ff884dfc7bd24ff.tar.gz ppe42-gcc-eed31a1178e92a2e5f024e099ff884dfc7bd24ff.zip | |
PR opt/13159
* cfgloopanal.c (mark_irreducible_loops): Fix the strongly connected
components detection.
* loop-unswitch.c (unswitch_loop): Preserve simple preheaders.
* gcc.c-torture/compile/20031227-1.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@75174 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/loop-unswitch.c')
| -rw-r--r-- | gcc/loop-unswitch.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/loop-unswitch.c b/gcc/loop-unswitch.c index f276b7307a4..25728c2bf62 100644 --- a/gcc/loop-unswitch.c +++ b/gcc/loop-unswitch.c @@ -402,5 +402,9 @@ unswitch_loop (struct loops *loops, struct loop *loop, basic_block unswitch_on) fix_loop_placement (loop); fix_loop_placement (nloop); + /* Preserve the simple loop preheaders. */ + loop_split_edge_with (loop_preheader_edge (loop), NULL_RTX, loops); + loop_split_edge_with (loop_preheader_edge (nloop), NULL_RTX, loops); + return nloop; } |
