Preliminary support for block contexts in hydrogen.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index b01d542dadf04ceea51211e68593916992c9ea12..d44d37dd7da093c7c55bc4b8ddba0e28f852032b 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -2583,6 +2583,22 @@ LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
 }
 
 
+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(), rsi);
+  LOperand* function = UseRegisterAtStart(instr->function());
+  LAllocateBlockContext* result =
+      new(zone()) LAllocateBlockContext(context, function);
+  return MarkAsCall(DefineFixed(result, rsi), instr);
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64