flow.c (propagate_block): Add call-clobbered registers to significant too.

        * flow.c (propagate_block): Add call-clobbered registers to
        significant too.

From-SVN: r29989

gcc/ChangeLog

+Thu Oct 14 16:27:50 1999  Richard Henderson  <rth@cygnus.com>
+
+	* flow.c (propagate_block): Add call-clobbered registers to
+	significant too.
+
 Thu Oct 14 13:54:25 1999  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* toplev.c (main): Don't complain about options for other languages.

gcc/flow.c

@@ -3433,7 +3433,11 @@ propagate_block (old, first, last, significant, bnum, flags)
 		  for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
 		    if (call_used_regs[i] && ! global_regs[i]
 			&& ! fixed_regs[i])
-		      SET_REGNO_REG_SET (dead, i);
+		      {
+		        SET_REGNO_REG_SET (dead, i);
+			if (significant)
+		          SET_REGNO_REG_SET (significant, i);
+		      }
 
 		  /* The stack ptr is used (honorarily) by a CALL insn.  */
 		  SET_REGNO_REG_SET (live, STACK_POINTER_REGNUM);