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(jump_optimize): Use regno_last_note_uid when deciding 

From-SVN: r5727
This commit is contained in:
Richard Stallman 1993-10-11 07:02:09 +00:00
parent f1c7ce822f
commit b803fb99f3
1 changed files with 4 additions and 1 deletions
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5
gcc/jump.c
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@ -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);
}