diff options
| author | steven <steven@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-02-14 12:58:16 +0000 |
|---|---|---|
| committer | steven <steven@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-02-14 12:58:16 +0000 |
| commit | 72c0c58fb67609987a44ef9533943a598583f72c (patch) | |
| tree | 6a3c7957aa5ee4c1713897788c88abd7768d644a /gcc/reorg.c | |
| parent | 494d01693c283acfda74d344e6a1ddb4b3481982 (diff) | |
| download | gcc-72c0c58fb67609987a44ef9533943a598583f72c.tar.gz | |
* reorg.c (delete_computation): Comment fixes.
* caller-save.c (setup_save_areas): Idem.
* sel-sched-dump.c (dump_lv_set): Idem.
* rtl.def: Idem.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@156759 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/reorg.c')
| -rw-r--r-- | gcc/reorg.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/gcc/reorg.c b/gcc/reorg.c index b1de4bec60f..c649dfc9b12 100644 --- a/gcc/reorg.c +++ b/gcc/reorg.c @@ -3253,13 +3253,10 @@ delete_prior_computation (rtx note, rtx insn) /* Delete INSN and recursively delete insns that compute values used only by INSN. This uses the REG_DEAD notes computed during flow analysis. - If we are running before flow.c, we need do nothing since flow.c will - delete dead code. We also can't know if the registers being used are - dead or not at this point. - Otherwise, look at all our REG_DEAD notes. If a previous insn does - nothing other than set a register that dies in this insn, we can delete - that insn as well. + Look at all our REG_DEAD notes. If a previous insn does nothing other + than set a register that dies in this insn, we can delete that insn + as well. On machines with CC0, if CC0 is used in this insn, we may be able to delete the insn that set it. */ |