(simplify_binary_operation, case MULT): Don't convert to ASHIFT if

still generating RTL.

From-SVN: r6340

gcc/cse.c

@@ -649,6 +649,8 @@ static void cse_set_around_loop	PROTO((rtx, rtx, rtx));
 static rtx cse_basic_block	PROTO((rtx, rtx, struct branch_path *, int));
 static void count_reg_usage	PROTO((rtx, int *, rtx, int));
 
+extern int rtx_equal_function_value_matters;
+
 /* Return an estimate of the cost of computing rtx X.
    One use is in cse, to decide which expression to keep in the hash table.
    Another is in rtl generation, to pick the cheapest way to multiply.
@@ -3685,9 +3687,11 @@ simplify_binary_operation (code, mode, op0, op1)
 	  if (op1 == CONST1_RTX (mode))
 	    return op0;
 
-	  /* Convert multiply by constant power of two into shift.  */
+	  /* Convert multiply by constant power of two into shift unless
+	     we are still generating RTL.  This test is a kludge.  */
 	  if (GET_CODE (op1) == CONST_INT
-	      && (val = exact_log2 (INTVAL (op1))) >= 0)
+	      && (val = exact_log2 (INTVAL (op1))) >= 0
+	      && ! rtx_equal_function_value_matters)
 	    return gen_rtx (ASHIFT, mode, op0, GEN_INT (val));
 
 	  if (GET_CODE (op1) == CONST_DOUBLE