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| author | Richard Stallman <rms@gnu.org> | 1993-10-11 07:02:09 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-10-11 07:02:09 +0000 |
| commit | b803fb99f3fe1ebfc4ddad51c83358256aa28c37 (patch) | |
| tree | 39bdc519a92b4d385e6f07830a94cf150da27581 /gcc | |
| parent | f1c7ce822f2e4d06d5b2a74291b7621bc7610741 (diff) | |
| download | gcc-b803fb99f3fe1ebfc4ddad51c83358256aa28c37.zip gcc-b803fb99f3fe1ebfc4ddad51c83358256aa28c37.tar.gz gcc-b803fb99f3fe1ebfc4ddad51c83358256aa28c37.tar.bz2 | |
(jump_optimize): Use regno_last_note_uid when deciding
From-SVN: r5727
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/jump.c | 5 |
1 files changed, 4 insertions, 1 deletions
@@ -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); } |