* flow.c (mark_set_1): Respect not_dead when updating reg_live.

From-SVN: r33736

gcc/ChangeLog

@@ -3,6 +3,8 @@
 	* flow.c (split_edge): Don't allocate global_live_at_start for
 	the new block unless the old blocks had them as well.
 
+	* flow.c (mark_set_1): Respect not_dead when updating reg_live.
+
 2000-05-06  Zack Weinberg  <zack@wolery.cumb.org>
 
  	* cpphash.h: Remove conditional #define of __extension__.

gcc/flow.c

@@ -4373,6 +4373,7 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
 
       /* Mark the register as being dead.  */
       if (some_was_live
+	  && ! not_dead
 	  /* The stack pointer is never dead.  Well, not strictly true,
 	     but it's very difficult to tell from here.  Hopefully
 	     combine_stack_adjustments will fix up the most egregious