2010-12-21  Chung-Lin Tang  <cltang@codesourcery.com>

	Issue #10201

	Backport from mainline:

	2010-12-16  Chung-Lin Tang  <cltang@codesourcery.com>

	PR target/46883
	gcc/
	* config/arm/arm.md
	(zero_extendhisi2 for register input splitter): Change
	"register_operand" to "s_register_operand".
	(zero_extendqisi2 for register input splitter): Same.

	gcc/testsuite/
	* gcc.target/arm/pr46883.c: New testcase.

=== modified file 'gcc/config/arm/arm.md'
--- old/gcc/config/arm/arm.md	2011-01-05 11:42:19 +0000
+++ new/gcc/config/arm/arm.md	2011-01-05 11:52:16 +0000
@@ -4114,8 +4114,8 @@
 })
 
 (define_split
-  [(set (match_operand:SI 0 "register_operand" "")
-	(zero_extend:SI (match_operand:HI 1 "register_operand" "")))]
+  [(set (match_operand:SI 0 "s_register_operand" "")
+	(zero_extend:SI (match_operand:HI 1 "s_register_operand" "")))]
   "!TARGET_THUMB2 && !arm_arch6"
   [(set (match_dup 0) (ashift:SI (match_dup 2) (const_int 16)))
    (set (match_dup 0) (lshiftrt:SI (match_dup 0) (const_int 16)))]
@@ -4234,8 +4234,8 @@
 })
 
 (define_split
-  [(set (match_operand:SI 0 "register_operand" "")
-	(zero_extend:SI (match_operand:QI 1 "register_operand" "")))]
+  [(set (match_operand:SI 0 "s_register_operand" "")
+	(zero_extend:SI (match_operand:QI 1 "s_register_operand" "")))]
   "!arm_arch6"
   [(set (match_dup 0) (ashift:SI (match_dup 2) (const_int 24)))
    (set (match_dup 0) (lshiftrt:SI (match_dup 0) (const_int 24)))]

=== added file 'gcc/testsuite/gcc.target/arm/pr46883.c'
--- old/gcc/testsuite/gcc.target/arm/pr46883.c	1970-01-01 00:00:00 +0000
+++ new/gcc/testsuite/gcc.target/arm/pr46883.c	2011-01-05 11:52:16 +0000
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -march=armv5te" } */
+
+void bar (unsigned char *q, unsigned short *data16s, int len)
+{
+  int i;
+
+  for (i = 0; i < len; i++)
+    {
+      q[2 * i] =
+        (((data16s[i] & 0xFF) << 8) | ((data16s[i] >> 8) & 0xFF)) & 0xFF;
+      q[2 * i + 1] =
+        ((unsigned short)
+         (((data16s[i] & 0xFF) << 8) | ((data16s[i] >> 8) & 0xFF))) >> 8;
+    }
+}