diff options
Diffstat (limited to 'gcc/jump.c')
| -rw-r--r-- | gcc/jump.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/gcc/jump.c b/gcc/jump.c index e6dabd05c5c..d41373b9406 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -133,7 +133,30 @@ cleanup_barriers (void) if (BARRIER_P (prev)) delete_insn (insn); else if (prev != PREV_INSN (insn)) - reorder_insns_nobb (insn, insn, prev); + { + basic_block bb = BLOCK_FOR_INSN (prev); + rtx end = PREV_INSN (insn); + reorder_insns_nobb (insn, insn, prev); + if (bb) + { + /* If the backend called in machine reorg compute_bb_for_insn + and didn't free_bb_for_insn again, preserve basic block + boundaries. Move the end of basic block to PREV since + it is followed by a barrier now, and clear BLOCK_FOR_INSN + on the following notes. + ??? Maybe the proper solution for the targets that have + cfg around after machine reorg is not to run cleanup_barriers + pass at all. */ + BB_END (bb) = prev; + do + { + prev = NEXT_INSN (prev); + if (prev != insn && BLOCK_FOR_INSN (prev) == bb) + BLOCK_FOR_INSN (prev) = NULL; + } + while (prev != end); + } + } } } return 0; |