Support "andhi/andsi/anddi" as a zero-extending move.

gcc/

2010-10-08  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/45913
	* config/i386/i386.c (ix86_binary_operator_ok): Support
	"andhi/andsi/anddi" as a zero-extending move.

gcc/testsuite/

2010-10-08  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/45913
	* gcc.target/i386/pr45913.c: New.

From-SVN: r165215

gcc/ChangeLog

+2010-10-08  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/45913
+	* config/i386/i386.c (ix86_binary_operator_ok): Support
+	"andhi/andsi/anddi" as a zero-extending move.
+
 2010-10-08  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* builtins.c (fold_call_stmt): Don't copy gimple call arguments

gcc/config/i386/i386.c

@@ -14987,7 +14987,16 @@ ix86_binary_operator_ok (enum rtx_code code, enum machine_mode mode,
 
   /* Source 1 cannot be a non-matching memory.  */
   if (MEM_P (src1) && !rtx_equal_p (dst, src1))
-    return false;
+    {
+      /* Support "andhi/andsi/anddi" as a zero-extending move.  */
+      return (code == AND
+	      && (mode == HImode
+		  || mode == SImode
+		  || (TARGET_64BIT && mode == DImode))
+	      && CONST_INT_P (src2)
+	      && (INTVAL (src2) == 0xff
+		  || INTVAL (src2) == 0xffff));
+    }
 
   return true;
 }

gcc/testsuite/ChangeLog

+2010-10-08  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/45913
+	* gcc.target/i386/pr45913.c: New.
+
 2010-10-08  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR fortran/45943

gcc/testsuite/gcc.target/i386/pr45913.c

+/* PR target/45913 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fselective-scheduling2 -fsel-sched-pipelining -fsel-sched-pipelining-outer-loops" } */
+
+extern void bar (int, int);
+
+int ss[128];
+
+void
+foo (int i, int j, int k, int *p1, int *p2)
+{
+  int s[128];
+  __builtin_memcpy (s, ss, sizeof s);
+
+  while (i--)
+    {
+      int a = s[i];
+      while (j--)
+	bar (k, p2[a]);
+      j = s[i] & 0xFF;
+      bar (p1[a], k);
+    }
+}