Preliminary support for block contexts in hydrogen.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 79eb197257f1a8689e67c75ba6ac4fd42b2c603f..93dc830dab30e3630bac62966133e5c35f3e8843 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -2579,4 +2579,20 @@ LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   return AssignPointerMap(result);
 }
 
+
+LInstruction* LChunkBuilder::DoStoreFrameContext(HStoreFrameContext* instr) {
+  LOperand* context = UseRegisterAtStart(instr->context());
+  return new(zone()) LStoreFrameContext(context);
+}
+
+
+LInstruction* LChunkBuilder::DoAllocateBlockContext(
+    HAllocateBlockContext* instr) {
+  LOperand* context = UseFixed(instr->context(), cp);
+  LOperand* function = UseRegisterAtStart(instr->function());
+  LAllocateBlockContext* result =
+      new(zone()) LAllocateBlockContext(context, function);
+  return MarkAsCall(DefineFixed(result, cp), instr);
+}
+
 } }  // namespace v8::internal