re PR middle-end/26977 (ICE in emit_move_insn)

	PR middle-end/26977
	* expr.c (emit_group_store): Check whether simplify_gen_subreg returns
	NULL_RTX, indicating it couldn't create a valid paradoxical subreg.

From-SVN: r112626

gcc/ChangeLog

+2006-04-02  Roger Sayle  <roger@eyesopen.com>
+
+	PR middle-end/26977
+	* expr.c (emit_group_store): Check whether simplify_gen_subreg returns
+	NULL_RTX, indicating it couldn't create a valid paradoxical subreg.
+
 2006-04-02  Sebastian Pop  <pop@cri.ensmp.fr>
 
 	PR tree-optimization/26939

gcc/expr.c

@@ -1945,9 +1945,12 @@ emit_group_store (rtx orig_dst, rtx src, tree type ATTRIBUTE_UNUSED, int ssize)
 	    {
 	      temp = simplify_gen_subreg (outer, tmps[start],
 					  inner, bytepos);
-	      emit_move_insn (dst, temp);
-	      done = true;
-	      start++;
+	      if (temp)
+		{
+		  emit_move_insn (dst, temp);
+		  done = true;
+		  start++;
+		}
 	    }
 	}
 
@@ -1961,9 +1964,12 @@ emit_group_store (rtx orig_dst, rtx src, tree type ATTRIBUTE_UNUSED, int ssize)
 	    {
 	      temp = simplify_gen_subreg (outer, tmps[finish - 1],
 					  inner, bytepos);
-	      emit_move_insn (dst, temp);
-	      done = true;
-	      finish--;
+	      if (temp)
+		{
+		  emit_move_insn (dst, temp);
+		  done = true;
+		  finish--;
+		}
 	    }
 	}