diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/dce.c | 12 |
2 files changed, 13 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index aeab680..bb99b6f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2009-01-15 Kenneth Zadeck <zadeck@naturalbridge.com> + + * dce.c (find_call_stack_args, delete_unmarked_insns): Fixed + comments. + 2009-01-14 Jakub Jelinek <jakub@redhat.com> PR rtl-optimization/38245 @@ -358,7 +358,7 @@ find_call_stack_args (rtx call_insn, bool do_mark, bool fast, } /* Walk backwards, looking for argument stores. The search stops - when seeting another call, sp adjustment or memory store other than + when seeing another call, sp adjustment or memory store other than argument store. */ ret = false; for (insn = PREV_INSN (call_insn); insn; insn = prev_insn) @@ -522,9 +522,13 @@ delete_unmarked_insns (void) else if (marked_insn_p (insn)) continue; - /* Beware that reaching a dbg counter limit here can easily result - in miscompiled file, whenever some insn is eliminated, but - insn that depends on it is not. */ + /* Beware that reaching a dbg counter limit here can rarely + result in miscompiled file. This occurs when a group of + insns must be deleted together. Currently this only + can happen on non-looping pure and constant calls + on machines where ACCUMULATE_OUTGOING_ARGS is true. By + using the dbg_cnt, it is possible to remove the call, but + leave the argument pushes to the stack. */ if (!dbg_cnt (dce)) continue; |