re PR tree-optimization/59478 (Optimize variable access via byte copy)

gcc/testsuite/
	PR target/59478
	* gcc.target/sh/pr59478.c: New.

From-SVN: r227958

gcc/testsuite/ChangeLog

 2015-09-21  Oleg Endo  <olegendo@gcc.gnu.org>
 
+	PR target/59478
+	* gcc.target/sh/pr59478.c: New.
+
+2015-09-21  Oleg Endo  <olegendo@gcc.gnu.org>
+
 	PR target/67126
 	* gcc.target/sh/pr51244-12.c: Adjust testcase.
 	* gcc.target/sh/pr54236-2.c: Likewise.

gcc/testsuite/gcc.target/sh/pr59478.c

+/* Verify that the fmac insn is used for the standard fmaf function.  */
+/* { dg-do compile { target { any_fpu } } }  */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler-times "fpul" 8 } } */
+/* { dg-final { scan-assembler-times "\tflds\tfr" 2 } } */
+/* { dg-final { scan-assembler-times "\tsts\tfpul" 2 } } */
+/* { dg-final { scan-assembler-times "\tlds\tr" 2 } } */
+/* { dg-final { scan-assembler-times "\tfsts\tfpul" 2 } } */
+/* { dg-final { scan-assembler-not "mov" } } */
+
+int
+test_00 (float val)
+{
+  char valbytes[sizeof (float)];
+  __builtin_memcpy (valbytes, &val, sizeof (float));
+
+  int result;
+  __builtin_memcpy (&result, valbytes, sizeof (int));
+
+  return result;
+}
+
+float
+test_01 (int val)
+{
+  char valbytes[sizeof (int)];
+  __builtin_memcpy (valbytes, &val, sizeof (int));
+
+  float result;
+  __builtin_memcpy (&result, valbytes, sizeof (float));
+
+  return result;
+}
+
+int
+test_02 (float val)
+{
+  union { int i; float f; } tmp;
+  tmp.f = val;
+  return tmp.i;
+}
+
+float
+test_03 (int val)
+{
+  union { int i; float f; } tmp;
+  tmp.i = val;
+  return tmp.f;
+}