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| author | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-06-08 08:19:50 +0000 |
|---|---|---|
| committer | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-06-08 08:19:50 +0000 |
| commit | 89c8b802150d5c659fbf9f00174721e67f1db7e8 (patch) | |
| tree | 6f86296669830b6ab9e81bdfbae1fea91eb3fd33 /gcc/tree-ssa-loop-manip.c | |
| parent | bd7519f035e6ceedfb511a07a6d450817681ebcc (diff) | |
| download | gcc-89c8b802150d5c659fbf9f00174721e67f1db7e8.tar.gz | |
PR tree-optimization/27872
* tree-ssa-loop-manip.c (tree_unroll_loop): Set EDGE_IRREDUCIBLE_LOOP
flag on the new exit edge of the unrolled loop.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114482 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-loop-manip.c')
| -rw-r--r-- | gcc/tree-ssa-loop-manip.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-manip.c b/gcc/tree-ssa-loop-manip.c index 556264c58f4..0b29c5ee8b4 100644 --- a/gcc/tree-ssa-loop-manip.c +++ b/gcc/tree-ssa-loop-manip.c @@ -841,6 +841,7 @@ tree_unroll_loop (struct loops *loops, struct loop *loop, unsigned factor, use_operand_p op; bool ok; unsigned est_niter; + unsigned irr = loop_preheader_edge (loop)->flags & EDGE_IRREDUCIBLE_LOOP; sbitmap wont_exit; est_niter = expected_loop_iterations (loop); @@ -883,7 +884,7 @@ tree_unroll_loop (struct loops *loops, struct loop *loop, unsigned factor, loop_split_edge_with (loop_latch_edge (loop), NULL); exit_bb = single_pred (loop->latch); - new_exit = make_edge (exit_bb, rest, EDGE_FALSE_VALUE); + new_exit = make_edge (exit_bb, rest, EDGE_FALSE_VALUE | irr); new_exit->count = loop_preheader_edge (loop)->count; est_niter = est_niter / factor + 1; new_exit->probability = REG_BR_PROB_BASE / est_niter; |