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Diffstat (limited to 'gcc/tree-if-conv.c')
| -rw-r--r-- | gcc/tree-if-conv.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-if-conv.c b/gcc/tree-if-conv.c index ec2db007a61..98566e3fd19 100644 --- a/gcc/tree-if-conv.c +++ b/gcc/tree-if-conv.c @@ -3066,10 +3066,12 @@ tree_if_conversion (struct loop *loop, vec<gimple *> *preds) ifcvt_local_dce (loop->header); /* Perform local CSE, this esp. helps the vectorizer analysis if loads - and stores are involved. + and stores are involved. CSE only the loop body, not the entry + PHIs, those are to be kept in sync with the non-if-converted copy. ??? We'll still keep dead stores though. */ exit_bbs = BITMAP_ALLOC (NULL); bitmap_set_bit (exit_bbs, single_exit (loop)->dest->index); + bitmap_set_bit (exit_bbs, loop->latch->index); todo |= do_rpo_vn (cfun, loop_preheader_edge (loop), exit_bbs); BITMAP_FREE (exit_bbs); |