From 8cd8f856b33bbd6c6627eb0a18e34b046e2163f1 Mon Sep 17 00:00:00 2001 From: Geoff Keating Date: Wed, 2 Aug 2000 00:53:59 +0000 Subject: rtl.h (enum reg_note): Add REG_MAYBE_DEAD. * rtl.h (enum reg_note): Add REG_MAYBE_DEAD. * rtl.c (reg_note_name): Add REG_MAYBE_DEAD. * flow.c (propagate_one_insn): Allow deletion of prologue/epilogue insns if they have a REG_MAYBE_DEAD note attached. * config/rs6000/rs6000.c (rs6000_maybe_dead): New function. (rs6000_emit_load_toc_table): TOC loads may go dead. From-SVN: r35414 --- gcc/flow.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'gcc/flow.c') diff --git a/gcc/flow.c b/gcc/flow.c index 373e236..688e256 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -3428,7 +3428,8 @@ propagate_one_insn (pbi, insn) && (((HAVE_epilogue || HAVE_prologue) && prologue_epilogue_contains (insn)) || (HAVE_sibcall_epilogue - && sibcall_epilogue_contains (insn)))) + && sibcall_epilogue_contains (insn))) + && find_reg_note (insn, REG_MAYBE_DEAD, NULL_RTX) == 0) { if (flags & PROP_KILL_DEAD_CODE) { -- cgit v1.1