[AArch64] Set TREE_TARGET_GLOBALS in aarch64_set_current_function when new tree…

[AArch64] Set TREE_TARGET_GLOBALS in aarch64_set_current_function when new tree is the default node to recalculate optab availability

	PR target/69245
	* config/aarch64/aarch64.c (aarch64_set_current_function):
	Save/restore target globals when switching to
	target_option_default_node.

	* gcc.target/aarch64/pr69245_1.c: New test.

From-SVN: r233745

gcc/ChangeLog

 2016-02-26  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
+	PR target/69245
+	* config/aarch64/aarch64.c (aarch64_set_current_function):
+	Save/restore target globals when switching to
+	target_option_default_node.
+
+2016-02-26  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
 	PR target/69613
 	* config/aarch64/aarch64.c (aarch64_shift_truncation_mask):
 	Return 0 if !SHIFT_COUNT_TRUNCATED.

gcc/config/aarch64/aarch64.c

@@ -8576,7 +8576,7 @@ aarch64_set_current_function (tree fndecl)
       if (old_tree == new_tree)
 	;
 
-      else if (new_tree && new_tree != target_option_default_node)
+      else if (new_tree)
 	{
 	  cl_target_option_restore (&global_options,
 				    TREE_TARGET_OPTION (new_tree));

gcc/testsuite/ChangeLog

 2016-02-26  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
+	PR target/69245
+	* gcc.target/aarch64/pr69245_1.c: New test.
+
+2016-02-26  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
 	PR target/69613
 	* gcc.dg/torture/pr69613.c: New test.
 

gcc/testsuite/gcc.target/aarch64/pr69245_1.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -march=armv8-a+fp -fomit-frame-pointer" } */
+
+#pragma GCC target "arch=armv8-a+nofp"
+long a;
+static void
+fn1 ()
+{
+}
+
+#pragma GCC target "arch=armv8-a+fp"
+float
+fn2 (float a)
+{
+  return a + 2.0;
+}
+
+/* { dg-final { scan-assembler-not "__addsf3" } } */