diff options
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/gcc/function.c b/gcc/function.c index c71ddcc..ea40ad1 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -5923,7 +5923,9 @@ 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 @@ -5935,13 +5937,17 @@ thread_prologue_and_epilogue_insns (void) 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. */ + "main" prologue again. Because some targets require some of these + to be called in a specific order (i386 requires the split prologue + to be first, for example), we create all three sequences again here. + If this does not work for some target, 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 (); + { + split_prologue_seq = make_split_prologue_seq (); + prologue_seq = make_prologue_seq (); + epilogue_seq = make_epilogue_seq (); + } rtl_profile_for_bb (EXIT_BLOCK_PTR_FOR_FN (cfun)); |