diff options
| author | Richard Henderson <rth@redhat.com> | 2005-02-15 01:26:27 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2005-02-15 01:26:27 -0800 |
| commit | 934677f9cc4ff525b7139251b0a67586d1ac4e80 (patch) | |
| tree | 961babd85411d8ffc1c9470e5cd19e24e4031630 /gcc/bb-reorder.c | |
| parent | e22857eb9d98ed0dff03bb311988f18335a5bf71 (diff) | |
| download | gcc-934677f9cc4ff525b7139251b0a67586d1ac4e80.zip gcc-934677f9cc4ff525b7139251b0a67586d1ac4e80.tar.gz gcc-934677f9cc4ff525b7139251b0a67586d1ac4e80.tar.bz2 | |
bb-reorder.c (find_traces_1_round): Force fallthru edge from a call to be best_edge.
* bb-reorder.c (find_traces_1_round): Force fallthru edge from a
call to be best_edge.
From-SVN: r95062
Diffstat (limited to 'gcc/bb-reorder.c')
| -rw-r--r-- | gcc/bb-reorder.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c index f454ce0..d054ffd 100644 --- a/gcc/bb-reorder.c +++ b/gcc/bb-reorder.c @@ -488,6 +488,7 @@ find_traces_1_round (int branch_th, int exec_th, gcov_type count_th, do { int prob, freq; + bool ends_in_call; /* The probability and frequency of the best edge. */ int best_prob = INT_MIN / 2; @@ -501,6 +502,8 @@ find_traces_1_round (int branch_th, int exec_th, gcov_type count_th, fprintf (dump_file, "Basic block %d was visited in trace %d\n", bb->index, *n_traces - 1); + ends_in_call = block_ends_with_call_p (bb); + /* Select the successor that will be placed after BB. */ FOR_EACH_EDGE (e, ei, bb->succs) { @@ -520,6 +523,19 @@ find_traces_1_round (int branch_th, int exec_th, gcov_type count_th, prob = e->probability; freq = EDGE_FREQUENCY (e); + /* The only sensible preference for a call instruction is the + fallthru edge. Don't bother selecting anything else. */ + if (ends_in_call) + { + if (e->flags & EDGE_CAN_FALLTHRU) + { + best_edge = e; + best_prob = prob; + best_freq = freq; + } + continue; + } + /* Edge that cannot be fallthru or improbable or infrequent successor (i.e. it is unsuitable successor). */ if (!(e->flags & EDGE_CAN_FALLTHRU) || (e->flags & EDGE_COMPLEX) |