Simplify compiler's suspend check mechanism.

Move to a single mechanism for suspend checks.  Previously backwards
branches only checked the suspend count when an internal counter
reached zero, while returns always checked.  Now all checks use
the counter.

Change-Id: Ibca2881e102babbd134bb9b41d798e9e4a3b522c
diff --git a/src/compiler/codegen/arm/MethodCodegenDriver.cc b/src/compiler/codegen/arm/MethodCodegenDriver.cc
index fb665e6..6331254 100644
--- a/src/compiler/codegen/arm/MethodCodegenDriver.cc
+++ b/src/compiler/codegen/arm/MethodCodegenDriver.cc
@@ -1169,17 +1169,17 @@
             break;
 
         case OP_RETURN_VOID:
-            genSuspendPoll(cUnit, mir);
+            genSuspendTest(cUnit, mir);
             break;
 
         case OP_RETURN:
         case OP_RETURN_OBJECT:
-            genSuspendPoll(cUnit, mir);
+            genSuspendTest(cUnit, mir);
             storeValue(cUnit, getRetLoc(cUnit), rlSrc[0]);
             break;
 
         case OP_RETURN_WIDE:
-            genSuspendPoll(cUnit, mir);
+            genSuspendTest(cUnit, mir);
             storeValueWide(cUnit, getRetLocWide(cUnit), rlSrc[0]);
             break;