Fast-codegen: Arguments object working on all platforms.

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index 57ee26cd79c3b7414849ca14cac6b6c68ec1998a..e56ac6e98816fddf7a8119ba312a0ee7eaa7b5f0 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -1171,6 +1171,26 @@ void MacroAssembler::Abort(const char* msg) {
 }
 
 
+void MacroAssembler::LoadContext(Register dst, int context_chain_length) {
+  if (context_chain_length > 0) {
+    // Move up the chain of contexts to the context containing the slot.
+    ldr(dst, MemOperand(cp, Context::SlotOffset(Context::CLOSURE_INDEX)));
+    // Load the function context (which is the incoming, outer context).
+    ldr(dst, FieldMemOperand(dst, JSFunction::kContextOffset));
+    for (int i = 1; i < context_chain_length; i++) {
+      ldr(dst, MemOperand(dst, Context::SlotOffset(Context::CLOSURE_INDEX)));
+      ldr(dst, FieldMemOperand(dst, JSFunction::kContextOffset));
+    }
+    // The context may be an intermediate context, not a function context.
+    ldr(dst, MemOperand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX)));
+  } else {  // Slot is in the current function context.
+    // The context may be an intermediate context, not a function context.
+    ldr(dst, MemOperand(cp, Context::SlotOffset(Context::FCONTEXT_INDEX)));
+  }
+}
+
+
+
 #ifdef ENABLE_DEBUGGER_SUPPORT
 CodePatcher::CodePatcher(byte* address, int instructions)
     : address_(address),