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| author | Geoff Keating <geoffk@cygnus.com> | 2000-08-02 00:53:59 +0000 |
|---|---|---|
| committer | Geoffrey Keating <geoffk@gcc.gnu.org> | 2000-08-02 00:53:59 +0000 |
| commit | 8cd8f856b33bbd6c6627eb0a18e34b046e2163f1 (patch) | |
| tree | 51e7cfa73194f407e18d5c607f8f9f28b8c01196 /gcc/flow.c | |
| parent | 7d17b34de55c8cd8d83581036f8e87fae492db13 (diff) | |
| download | gcc-8cd8f856b33bbd6c6627eb0a18e34b046e2163f1.zip gcc-8cd8f856b33bbd6c6627eb0a18e34b046e2163f1.tar.gz gcc-8cd8f856b33bbd6c6627eb0a18e34b046e2163f1.tar.bz2 | |
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
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -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) { |