2005-05-10  Jakub Jelinek  <jakub@redhat.com>
 
	* config/i386/i386.md (movsi_insv_1, movdi_insv_1_rex64): Mask
	CONST_INT values with 255.
 
	* gcc.dg/20050510-2.c: New test.
 
--- gcc/config/i386/i386.md.jj	2005-05-10 00:47:12.000000000 +0200
+++ gcc/config/i386/i386.md	2005-05-10 14:01:42.000000000 +0200
@@ -1771,7 +1771,11 @@
 			 (const_int 8))
 	(match_operand:SI 1 "general_operand" "Qmn"))]
   "!TARGET_64BIT"
-  "mov{b}\t{%b1, %h0|%h0, %b1}"
+{
+  if (GET_CODE (operands[1]) == CONST_INT)
+    operands[1] = GEN_INT (INTVAL (operands[1]) & 255);
+  return "mov{b}\t{%b1, %h0|%h0, %b1}";
+}
   [(set_attr "type" "imov")
    (set_attr "mode" "QI")])
 
@@ -1781,7 +1785,11 @@
 			 (const_int 8))
 	(match_operand:DI 1 "nonmemory_operand" "Qn"))]
   "TARGET_64BIT"
-  "mov{b}\t{%b1, %h0|%h0, %b1}"
+{
+  if (GET_CODE (operands[1]) == CONST_INT)
+    operands[1] = GEN_INT (INTVAL (operands[1]) & 255);
+  return "mov{b}\t{%b1, %h0|%h0, %b1}";
+}
   [(set_attr "type" "imov")
    (set_attr "mode" "QI")])
 
--- gcc/testsuite/gcc.dg/20050510-2.c.jj	2005-04-07 15:51:53.775361896 +0200
+++ gcc/testsuite/gcc.dg/20050510-2.c	2005-05-10 14:37:12.000000000 +0200
@@ -0,0 +1,26 @@
+/* { dg-options run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+__attribute__((noinline)) int
+foo (unsigned char *x)
+{
+  if (x[0] != 1 || x[1] != 0x15)
+    abort ();
+  return 0;
+}
+
+static inline void
+bar (unsigned short x)
+{
+  unsigned char s[2] = { x >> 8, x & 0xff };
+  foo (s);
+}
+
+int
+main (void)
+{
+  bar (0x115);
+  return 0;
+}