sh.c (expand_cbranchdi4): Set msw_skip when the high part of the second operand is 0.

	* config/sh/sh.c (expand_cbranchdi4): Set msw_skip when the high
	part of the second operand is 0.
	* gcc.c-torture/execute/pr49186.c: New.

From-SVN: r174456

gcc/ChangeLog

+2011-05-30  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/49186
+	* config/sh/sh.c (expand_cbranchdi4): Set msw_skip when the high
+	part of the second operand is 0.
+
 2011-05-30  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (*movxf_internal): Penalize FYx*r->o alternative

gcc/config/sh/sh.c

@@ -2143,7 +2143,10 @@ expand_cbranchdi4 (rtx *operands, enum rtx_code comparison)
 	  else if (op2h != CONST0_RTX (SImode))
 	    msw_taken = LTU;
 	  else
-	    break;
+	    {
+	      msw_skip = swap_condition (LTU);
+	      break;
+	    }
 	  msw_skip = swap_condition (msw_taken);
 	}
       break;

gcc/testsuite/ChangeLog

+2011-05-30  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/49186
+	* gcc.c-torture/execute/pr49186.c: New.
+
 2011-05-30  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/49168

gcc/testsuite/gcc.c-torture/execute/pr49186.c

+/* PR target/49186 */
+extern void abort (void);
+
+int
+main ()
+{
+  int x;
+  unsigned long long uv = 0x1000000001ULL;
+
+  x = (uv < 0x80) ? 1 : ((uv < 0x800) ? 2 : 3);
+  if (x != 3)
+    abort ();
+
+  return 0;
+}