diff options
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 7e584c961d0..d6dbcf0fbc1 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -1262,7 +1262,18 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before, insn = NEXT_INSN (copy_start); while (insn != safety_label) { - if (insn != start_label) + /* ??? Don't delete named code labels. They will be deleted when the + jump that references them is deleted. Otherwise, we end up deleting + them twice, which causes them to completely disappear instead of turn + into NOTE_INSN_DELETED_LABEL notes. This in turn causes aborts in + dwarfout.c/dwarf2out.c. We could perhaps fix the dwarf*out.c files + to handle deleted labels instead. Or perhaps fix DECL_RTL of the + associated LABEL_DECL to point to one of the new label instances. */ + /* ??? Likewise, we can't delete a NOTE_INSN_DELETED_LABEL note. */ + if (insn != start_label + && ! (GET_CODE (insn) == CODE_LABEL && LABEL_NAME (insn)) + && ! (GET_CODE (insn) == NOTE + && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)) insn = delete_insn (insn); else insn = NEXT_INSN (insn); |