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| author | John Hassey <hassey@gnu.org> | 1993-02-12 15:52:54 +0000 |
|---|---|---|
| committer | John Hassey <hassey@gnu.org> | 1993-02-12 15:52:54 +0000 |
| commit | 9392c110ebf2313163f444f21341b6c5c8daf44c (patch) | |
| tree | e831c370161ca8d7d3879c4096c33c4343edbf49 | |
| parent | f3acae4d7c0868869eb29ab7cf885dab0ae55bd7 (diff) | |
| download | gcc-9392c110ebf2313163f444f21341b6c5c8daf44c.zip gcc-9392c110ebf2313163f444f21341b6c5c8daf44c.tar.gz gcc-9392c110ebf2313163f444f21341b6c5c8daf44c.tar.bz2 | |
(reposition_prologue_and_epilogue_notes): Allow
for zero length prologue and epilogue list.
From-SVN: r3465
| -rw-r--r-- | gcc/function.c | 102 |
1 files changed, 54 insertions, 48 deletions
diff --git a/gcc/function.c b/gcc/function.c index 5e159a6..b1ce844 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -4750,30 +4750,33 @@ reposition_prologue_and_epilogue_notes (f) reorg has run. */ for (len = 0; prologue[len]; len++) ; - for (insn = f; insn; insn = NEXT_INSN (insn)) - if (GET_CODE (insn) == NOTE) - { - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_PROLOGUE_END) - note = insn; - } - else if ((len -= contains (insn, prologue)) == 0) - { - /* Find the prologue-end note if we haven't already, and - move it to just after the last prologue insn. */ - if (note == 0) - for (note = insn; note = NEXT_INSN (note);) - if (GET_CODE (note) == NOTE - && NOTE_LINE_NUMBER (note) == NOTE_INSN_PROLOGUE_END) - break; - next = NEXT_INSN (note); - prev = PREV_INSN (note); - if (prev) - NEXT_INSN (prev) = next; - if (next) - PREV_INSN (next) = prev; - add_insn_after (note, insn); - break; - } + for (insn = f; len && insn; insn = NEXT_INSN (insn)) + { + if (GET_CODE (insn) == NOTE) + { + if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_PROLOGUE_END) + note = insn; + } + else if ((len -= contains (insn, prologue)) == 0) + { + /* Find the prologue-end note if we haven't already, and + move it to just after the last prologue insn. */ + if (note == 0) + { + for (note = insn; note = NEXT_INSN (note);) + if (GET_CODE (note) == NOTE + && NOTE_LINE_NUMBER (note) == NOTE_INSN_PROLOGUE_END) + break; + } + next = NEXT_INSN (note); + prev = PREV_INSN (note); + if (prev) + NEXT_INSN (prev) = next; + if (next) + PREV_INSN (next) = prev; + add_insn_after (note, insn); + } + } } if (epilogue) @@ -4785,30 +4788,33 @@ reposition_prologue_and_epilogue_notes (f) reorg has run. */ for (len = 0; epilogue[len]; len++) ; - for (insn = get_last_insn (); insn; insn = PREV_INSN (insn)) - if (GET_CODE (insn) == NOTE) - { - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EPILOGUE_BEG) - note = insn; - } - else if ((len -= contains (insn, epilogue)) == 0) - { - /* Find the epilogue-begin note if we haven't already, and - move it to just before the first epilogue insn. */ - if (note == 0) - for (note = insn; note = PREV_INSN (note);) - if (GET_CODE (note) == NOTE - && NOTE_LINE_NUMBER (note) == NOTE_INSN_EPILOGUE_BEG) - break; - next = NEXT_INSN (note); - prev = PREV_INSN (note); - if (prev) - NEXT_INSN (prev) = next; - if (next) - PREV_INSN (next) = prev; - add_insn_after (note, PREV_INSN (insn)); - break; - } + for (insn = get_last_insn (); len && insn; insn = PREV_INSN (insn)) + { + if (GET_CODE (insn) == NOTE) + { + if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EPILOGUE_BEG) + note = insn; + } + else if ((len -= contains (insn, epilogue)) == 0) + { + /* Find the epilogue-begin note if we haven't already, and + move it to just before the first epilogue insn. */ + if (note == 0) + { + for (note = insn; note = PREV_INSN (note);) + if (GET_CODE (note) == NOTE + && NOTE_LINE_NUMBER (note) == NOTE_INSN_EPILOGUE_BEG) + break; + } + next = NEXT_INSN (note); + prev = PREV_INSN (note); + if (prev) + NEXT_INSN (prev) = next; + if (next) + PREV_INSN (next) = prev; + add_insn_after (note, PREV_INSN (insn)); + } + } } } #endif /* HAVE_prologue or HAVE_epilogue */ |