diff options
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/gcc/function.c b/gcc/function.c index cdd2721..5dafb8c 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -5919,16 +5919,25 @@ thread_prologue_and_epilogue_insns (void) edge entry_edge = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun)); edge orig_entry_edge = entry_edge; - rtx_insn *split_prologue_seq = make_split_prologue_seq (); rtx_insn *prologue_seq = make_prologue_seq (); - rtx_insn *epilogue_seq = make_epilogue_seq (); /* Try to perform a kind of shrink-wrapping, making sure the prologue/epilogue is emitted only around those parts of the function that require it. */ - try_shrink_wrapping (&entry_edge, prologue_seq); + /* If the target can handle splitting the prologue/epilogue into separate + components, try to shrink-wrap these components separately. */ + try_shrink_wrapping_separate (entry_edge->dest); + + /* If that did anything for any component we now need the generate the + "main" prologue again. If that does not work for some target then + that target should not enable separate shrink-wrapping. */ + if (crtl->shrink_wrapped_separate) + prologue_seq = make_prologue_seq (); + + rtx_insn *split_prologue_seq = make_split_prologue_seq (); + rtx_insn *epilogue_seq = make_epilogue_seq (); rtl_profile_for_bb (EXIT_BLOCK_PTR_FOR_FN (cfun)); |