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| author | Kazu Hirata <kazu@cs.umass.edu> | 2004-11-23 19:34:35 +0000 |
|---|---|---|
| committer | Kazu Hirata <kazu@gcc.gnu.org> | 2004-11-23 19:34:35 +0000 |
| commit | 07b43a87c0a558c3b840da1ed9ba530eef710309 (patch) | |
| tree | 55f653628fc5b253fce0fd791902fdb5edfba255 | |
| parent | 6b66c71882bde3e130b6fca319ea6a1a3a964d06 (diff) | |
| download | gcc-07b43a87c0a558c3b840da1ed9ba530eef710309.zip gcc-07b43a87c0a558c3b840da1ed9ba530eef710309.tar.gz gcc-07b43a87c0a558c3b840da1ed9ba530eef710309.tar.bz2 | |
tree-cfg.c (tree_try_redirect_by_replacing_jump): Speed up by restricting to the case with two outgoing edges.
* tree-cfg.c (tree_try_redirect_by_replacing_jump): Speed up
by restricting to the case with two outgoing edges.
From-SVN: r91098
| -rw-r--r-- | gcc/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/tree-cfg.c | 14 |
2 files changed, 9 insertions, 8 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2fa744f..f809b27 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -15,6 +15,9 @@ * tree.h (PHI_ARG_EDGE): Redefine in terms of EDGE_PRED. (phi_arg_d): Remove e. + * tree-cfg.c (tree_try_redirect_by_replacing_jump): Speed up + by restricting to the case with two outgoing edges. + 2004-11-23 Andreas Krebbel <krebbel1@de.ibm.com> * config/s390/s390.c (s390_backchain_string): Removed. diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index 1f934cb..b59c8f7 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -4247,17 +4247,15 @@ static edge tree_try_redirect_by_replacing_jump (edge e, basic_block target) { basic_block src = e->src; - edge tmp; block_stmt_iterator b; tree stmt; - edge_iterator ei; - - /* Verify that all targets will be TARGET. */ - FOR_EACH_EDGE (tmp, ei, src->succs) - if (tmp->dest != target && tmp != e) - break; - if (tmp) + /* We can replace or remove a complex jump only when we have exactly + two edges. */ + if (EDGE_COUNT (src->succs) != 2 + /* Verify that all targets will be TARGET. Specifically, the + edge that is not E must also go to TARGET. */ + || EDGE_SUCC (src, EDGE_SUCC (src, 0) == e)->dest != target) return NULL; b = bsi_last (src); |