diff options
Diffstat (limited to 'contrib/gcc/function.c')
-rw-r--r-- | contrib/gcc/function.c | 59 |
1 files changed, 55 insertions, 4 deletions
diff --git a/contrib/gcc/function.c b/contrib/gcc/function.c index e597d33..cd8f249 100644 --- a/contrib/gcc/function.c +++ b/contrib/gcc/function.c @@ -6704,7 +6704,10 @@ void thread_prologue_and_epilogue_insns (f) rtx f ATTRIBUTE_UNUSED; { - int insertted = 0; + int inserted = 0; +#ifdef HAVE_prologue + rtx prologue_end = NULL_RTX; +#endif prologue = 0; #ifdef HAVE_prologue @@ -6721,7 +6724,7 @@ thread_prologue_and_epilogue_insns (f) seq = get_insns (); prologue = record_insns (seq); - emit_note (NULL, NOTE_INSN_PROLOGUE_END); + prologue_end = emit_note (NULL, NOTE_INSN_PROLOGUE_END); seq = gen_sequence (); end_sequence (); @@ -6734,7 +6737,7 @@ thread_prologue_and_epilogue_insns (f) abort (); insert_insn_on_edge (seq, ENTRY_BLOCK_PTR->succ); - insertted = 1; + inserted = 1; } else emit_insn_after (seq, f); @@ -6866,8 +6869,56 @@ thread_prologue_and_epilogue_insns (f) } #endif - if (insertted) + if (inserted) commit_edge_insertions (); + +#ifdef HAVE_prologue + if (prologue_end) + { + rtx insn, prev; + + /* GDB handles `break f' by setting a breakpoint on the first + line note *after* the prologue. Which means (1) that if + there are line number notes before where we inserted the + prologue we should move them, and (2) if there is no such + note, then we should generate one at the prologue. */ + + for (insn = prologue_end; insn ; insn = prev) + { + prev = PREV_INSN (insn); + if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0) + { + /* Note that we cannot reorder the first insn in the + chain, since rest_of_compilation relies on that + remaining constant. Do the next best thing. */ + if (prev == NULL) + { + emit_line_note_after (NOTE_SOURCE_FILE (insn), + NOTE_LINE_NUMBER (insn), + prologue_end); + NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; + } + else + reorder_insns (insn, insn, prologue_end); + } + } + + insn = NEXT_INSN (prologue_end); + if (! insn || GET_CODE (insn) != NOTE || NOTE_LINE_NUMBER (insn) <= 0) + { + for (insn = next_active_insn (f); insn ; insn = PREV_INSN (insn)) + { + if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0) + { + emit_line_note_after (NOTE_SOURCE_FILE (insn), + NOTE_LINE_NUMBER (insn), + prologue_end); + break; + } + } + } + } + #endif } /* Reposition the prologue-end and epilogue-begin notes after instruction |