(reposition_prologue_and_epilogue_notes): Allow
for zero length prologue and epilogue list. From-SVN: r3465
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parent
f3acae4d7c
commit
9392c110eb
102
gcc/function.c
102
gcc/function.c
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@ -4750,30 +4750,33 @@ reposition_prologue_and_epilogue_notes (f)
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reorg has run. */
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for (len = 0; prologue[len]; len++)
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;
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for (insn = f; insn; insn = NEXT_INSN (insn))
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if (GET_CODE (insn) == NOTE)
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{
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if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_PROLOGUE_END)
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note = insn;
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}
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else if ((len -= contains (insn, prologue)) == 0)
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{
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/* Find the prologue-end note if we haven't already, and
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move it to just after the last prologue insn. */
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if (note == 0)
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for (note = insn; note = NEXT_INSN (note);)
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if (GET_CODE (note) == NOTE
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&& NOTE_LINE_NUMBER (note) == NOTE_INSN_PROLOGUE_END)
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break;
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next = NEXT_INSN (note);
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prev = PREV_INSN (note);
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if (prev)
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NEXT_INSN (prev) = next;
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if (next)
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PREV_INSN (next) = prev;
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add_insn_after (note, insn);
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break;
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}
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for (insn = f; len && insn; insn = NEXT_INSN (insn))
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{
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if (GET_CODE (insn) == NOTE)
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{
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if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_PROLOGUE_END)
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note = insn;
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}
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else if ((len -= contains (insn, prologue)) == 0)
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{
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/* Find the prologue-end note if we haven't already, and
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move it to just after the last prologue insn. */
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if (note == 0)
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{
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for (note = insn; note = NEXT_INSN (note);)
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if (GET_CODE (note) == NOTE
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&& NOTE_LINE_NUMBER (note) == NOTE_INSN_PROLOGUE_END)
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break;
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}
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next = NEXT_INSN (note);
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prev = PREV_INSN (note);
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if (prev)
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NEXT_INSN (prev) = next;
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if (next)
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PREV_INSN (next) = prev;
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add_insn_after (note, insn);
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}
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}
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}
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if (epilogue)
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@ -4785,30 +4788,33 @@ reposition_prologue_and_epilogue_notes (f)
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reorg has run. */
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for (len = 0; epilogue[len]; len++)
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;
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for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
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if (GET_CODE (insn) == NOTE)
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{
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if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EPILOGUE_BEG)
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note = insn;
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}
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else if ((len -= contains (insn, epilogue)) == 0)
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{
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/* Find the epilogue-begin note if we haven't already, and
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move it to just before the first epilogue insn. */
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if (note == 0)
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for (note = insn; note = PREV_INSN (note);)
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if (GET_CODE (note) == NOTE
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&& NOTE_LINE_NUMBER (note) == NOTE_INSN_EPILOGUE_BEG)
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break;
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next = NEXT_INSN (note);
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prev = PREV_INSN (note);
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if (prev)
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NEXT_INSN (prev) = next;
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if (next)
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PREV_INSN (next) = prev;
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add_insn_after (note, PREV_INSN (insn));
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break;
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}
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for (insn = get_last_insn (); len && insn; insn = PREV_INSN (insn))
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{
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if (GET_CODE (insn) == NOTE)
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{
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if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EPILOGUE_BEG)
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note = insn;
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}
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else if ((len -= contains (insn, epilogue)) == 0)
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{
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/* Find the epilogue-begin note if we haven't already, and
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move it to just before the first epilogue insn. */
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if (note == 0)
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{
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for (note = insn; note = PREV_INSN (note);)
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if (GET_CODE (note) == NOTE
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&& NOTE_LINE_NUMBER (note) == NOTE_INSN_EPILOGUE_BEG)
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break;
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}
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next = NEXT_INSN (note);
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prev = PREV_INSN (note);
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if (prev)
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NEXT_INSN (prev) = next;
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if (next)
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PREV_INSN (next) = prev;
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add_insn_after (note, PREV_INSN (insn));
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}
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}
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}
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}
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#endif /* HAVE_prologue or HAVE_epilogue */
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