re PR target/55146 (jumptables with byte entries produce wrong code with -Os/-O2 for SH-1)

	PR target/55146
	* gcc.target/sh/pr55146.c: New.

From-SVN: r195743

gcc/testsuite/ChangeLog

-2012-02-04  Oleg Endo  <olegendo@gcc.gnu.org>
+2013-02-04  Oleg Endo  <olegendo@gcc.gnu.org>
+
+	PR target/55146
+	* gcc.target/sh/pr55146.c: New.
+
+2013-02-04  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR tree-optimization/54386
 	* gcc.target/sh/pr54386.c: New.

gcc/testsuite/gcc.target/sh/pr55146.c

+/* Check that the 'extu.b' instruction is generated for short jump tables.  */
+/* { dg-do compile { target "sh*-*-*" } } */
+/* { dg-options "-Os" } */
+/* { dg-skip-if "" { "sh*-*-*" } { "-m5*"} { "" } }  */
+/* { dg-final { scan-assembler "extu.b" } } */
+
+int
+test (int arg)
+{
+  int rc;
+  switch (arg)
+    {
+    case 0:
+      asm ("nop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "nop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "mov r4,%0"
+	   : "=r" (rc)
+	   : "r" (arg));
+      break;
+    case 1:
+      asm ("nop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "nop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "mov r5,%0"
+	   : "=r" (rc)
+	   : "r" (arg));
+      break;
+    case 2:
+      asm ("nop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "nop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "mov r6,%0"
+	   : "=r" (rc)
+	   : "r" (arg));
+      break;
+    case 3:
+      asm ("nop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "nop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "mov r7,%0"
+	   : "=r" (rc)
+	   : "r" (arg));
+      break;
+    case 4:
+      asm ("nop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "nop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\t"
+	   "mov r8,%0"
+	   : "=r" (rc)
+	   : "r" (arg));
+      break;
+    }
+  return rc;
+}