(expand_shift): Truncate immediate count if SHIFT_COUNT_TRUNCATED.

From-SVN: r6538

diff --git a/gcc/expmed.c b/gcc/expmed.c
index ccf130e5672ef48d3f869d8d49ed450a48e9d2bb..a4eea00641761b7c94933b5d67e657c0c4db6678 100644 (file)
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -1602,6 +1602,14 @@ expand_shift (code, mode, shifted, amount, target, unsignedp)
 
   op1 = expand_expr (amount, NULL_RTX, VOIDmode, 0);
 
+#if SHIFT_COUNT_TRUNCATED
+  if (SHIFT_COUNT_TRUNCATED
+      && GET_CODE (op1) == CONST_INT
+      && (unsigned HOST_WIDE_INT) INTVAL (op1) >= GET_MODE_BITSIZE (mode))
+    op1 = GEN_INT ((unsigned HOST_WIDE_INT) INTVAL (op1)
+                  % GET_MODE_BITSIZE (mode));
+#endif
+
   if (op1 == const0_rtx)
     return shifted;