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| author | Jan Hubicka <jh@suse.cz> | 2001-06-11 15:49:24 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2001-06-11 13:49:24 +0000 |
| commit | 4bb83350d48a512294f661a484353481b97e7360 (patch) | |
| tree | 5a9aabf7b8265d88189e079bc2dd086773323d39 /gcc/jump.c | |
| parent | 1552f8745719c1b62efc50579e200c7e851924c5 (diff) | |
| download | gcc-4bb83350d48a512294f661a484353481b97e7360.zip gcc-4bb83350d48a512294f661a484353481b97e7360.tar.gz gcc-4bb83350d48a512294f661a484353481b97e7360.tar.bz2 | |
* jump.c (duplicate_loop_exit_test): Fix loop header heuristics.
From-SVN: r43189
Diffstat (limited to 'gcc/jump.c')
| -rw-r--r-- | gcc/jump.c | 9 |
1 files changed, 5 insertions, 4 deletions
@@ -1257,10 +1257,11 @@ duplicate_loop_exit_test (loop_start) rtx label = JUMP_LABEL (copy); if (label) { - if (PREV_INSN (label) - && GET_CODE (PREV_INSN (label)) == NOTE - && (NOTE_LINE_NUMBER (PREV_INSN (label)) - == NOTE_INSN_LOOP_CONT)) + /* The jump_insn after loop_start should be followed + by barrier and loopback label. */ + if (prev_nonnote_insn (label) + && (PREV_INSN (prev_nonnote_insn (label)) + == NEXT_INSN (loop_start))) predict_insn_def (copy, PRED_LOOP_HEADER, TAKEN); else predict_insn_def (copy, PRED_LOOP_HEADER, NOT_TAKEN); |