diff options
Diffstat (limited to 'gcc/jump.c')
| -rw-r--r-- | gcc/jump.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/jump.c b/gcc/jump.c index 7b8094ccdf4..f26170f67c1 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -540,7 +540,10 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan) if (set && GET_CODE (SET_DEST (set)) == REG && REGNO (SET_DEST (set)) >= FIRST_PSEUDO_REGISTER && regno_first_uid[REGNO (SET_DEST (set))] == INSN_UID (insn) - && regno_last_uid[REGNO (SET_DEST (set))] == INSN_UID (insn) + /* We use regno_last_note_uid so as not to delete the setting + of a reg that's used in notes. A subsequent optimization + might arrange to use that reg for real. */ + && regno_last_note_uid[REGNO (SET_DEST (set))] == INSN_UID (insn) && ! side_effects_p (SET_SRC (set))) delete_insn (insn); } |