[testsuite] Cache return value of check_effective_target_tiny

	* lib/target-supports.exp (check_effective_target_tiny): Cache
	predicate value.

From-SVN: r218344

gcc/testsuite/ChangeLog

+2014-12-04  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* lib/target-supports.exp (check_effective_target_tiny): Cache
+	predicate value.
+
 2014-12-04  Jack Howarth  <howarth@bromo.med.uc.edu>
 	
 	PR testsuite/64145

gcc/testsuite/lib/target-supports.exp

@@ -6053,11 +6053,19 @@ proc check_effective_target_fenv_exceptions {} {
 }
 
 proc check_effective_target_tiny {} {
+    global et_target_tiny_saved
+
+    if [info exists et_target_tine_saved] {
+      verbose "check_effective_target_tiny: using cached result" 2
+    } else {
+       set et_target_tiny_saved 0
        if { [istarget aarch64*-*-*]
              && [check_effective_target_aarch64_tiny] } {
-        return 1
+         set et_target_tiny_saved 1
        }
-    return 0
+    }
+
+    return $et_target_tiny_saved
 }
 
 # Return 1 if LOGICAL_OP_NON_SHORT_CIRCUIT is set to 0 for the current target.