(simplify_binary_operation): Test value of SHIFT_COUNT_TRUNCATED if it

is defined.

From-SVN: r5731

gcc/cse.c

@@ -3409,6 +3409,7 @@ simplify_binary_operation (code, mode, op0, op1)
 	case ASHIFT:     case LSHIFT:
 	case ROTATE:     case ROTATERT:
 #ifdef SHIFT_COUNT_TRUNCATED
+	  if (SHIFT_COUNT_TRUNCATED)
 	    l2 &= (GET_MODE_BITSIZE (mode) - 1), h2 = 0;
 #endif
 
@@ -3840,6 +3841,7 @@ simplify_binary_operation (code, mode, op0, op1)
 	return 0;
 
 #ifdef SHIFT_COUNT_TRUNCATED
+      if (SHIFT_COUNT_TRUNCATED)
 	arg1 &= (BITS_PER_WORD - 1);
 #endif
 
@@ -3855,6 +3857,7 @@ simplify_binary_operation (code, mode, op0, op1)
 	return 0;
 
 #ifdef SHIFT_COUNT_TRUNCATED
+      if (SHIFT_COUNT_TRUNCATED)
 	arg1 &= (BITS_PER_WORD - 1);
 #endif
 
@@ -3869,6 +3872,7 @@ simplify_binary_operation (code, mode, op0, op1)
 	return 0;
 
 #ifdef SHIFT_COUNT_TRUNCATED
+      if (SHIFT_COUNT_TRUNCATED)
 	arg1 &= (BITS_PER_WORD - 1);
 #endif