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| author | Andrey Belevantsev <abel@ispras.ru> | 2013-08-14 18:31:26 +0400 |
|---|---|---|
| committer | Alexander Monakov <amonakov@gcc.gnu.org> | 2013-08-14 18:31:26 +0400 |
| commit | e839e2a9311ecfa2cfd8e9bc0b6eeba65da48418 (patch) | |
| tree | 6797bfb33445b2da9e17d960737957cc6f4fdc6f /gcc/sel-sched.c | |
| parent | aec9ba36b142026cae3b194840c41d9ba7b5c8f4 (diff) | |
| download | gcc-e839e2a9311ecfa2cfd8e9bc0b6eeba65da48418.zip gcc-e839e2a9311ecfa2cfd8e9bc0b6eeba65da48418.tar.gz gcc-e839e2a9311ecfa2cfd8e9bc0b6eeba65da48418.tar.bz2 | |
re PR rtl-optimization/57662 (ICE: SIGSEGV in code_motion_process_successors with -fschedule-insns2 -fselective-scheduling2)
PR rtl-optimization/57662
gcc/
* sel-sched.c (code_motion_process_successors): When the current insn
is removed after the recursive traversal, break from the loop.
Add comments and debug printouts.
testsuite/
* gcc.dg/pr57662.c: New test.
From-SVN: r201728
Diffstat (limited to 'gcc/sel-sched.c')
| -rw-r--r-- | gcc/sel-sched.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c index fb9386f..46c66b4 100644 --- a/gcc/sel-sched.c +++ b/gcc/sel-sched.c @@ -6424,10 +6424,23 @@ code_motion_process_successors (insn_t insn, av_set_t orig_ops, res = b; /* We have simplified the control flow below this point. In this case, - the iterator becomes invalid. We need to try again. */ + the iterator becomes invalid. We need to try again. + If we have removed the insn itself, it could be only an + unconditional jump. Thus, do not rescan but break immediately -- + we have already visited the only successor block. */ + if (!BLOCK_FOR_INSN (insn)) + { + if (sched_verbose >= 6) + sel_print ("Not doing rescan: already visited the only successor" + " of block %d\n", old_index); + break; + } if (BLOCK_FOR_INSN (insn)->index != old_index || EDGE_COUNT (bb->succs) != old_succs) { + if (sched_verbose >= 6) + sel_print ("Rescan: CFG was simplified below insn %d, block %d\n", + INSN_UID (insn), BLOCK_FOR_INSN (insn)->index); insn = sel_bb_end (BLOCK_FOR_INSN (insn)); goto rescan; } |