Compile and simulate first dart function on arm generated from ast.

runtime/vm/assembler_macros_arm.cc

Index: runtime/vm/assembler_macros_arm.cc
===================================================================
--- runtime/vm/assembler_macros_arm.cc	(revision 19151)
+++ runtime/vm/assembler_macros_arm.cc	(working copy)
@@ -7,8 +7,13 @@
 
 #include "vm/assembler_macros.h"
 
+#include "vm/assembler.h"
+
 namespace dart {
 
+#define __ assembler->
+
+
 void AssemblerMacros::TryAllocate(Assembler* assembler,
                                   const Class& cls,
                                   Label* failure,
@@ -20,14 +25,51 @@
 
 void AssemblerMacros::EnterDartFrame(Assembler* assembler,
                                      intptr_t frame_size) {
-  UNIMPLEMENTED();
+  const intptr_t offset = assembler->CodeSize();
+  // Save PC in frame for fast identification of corresponding code.
+  // Note that callee-saved registers can be added to the register list.
+  __ EnterFrame((1 << PP) | (1 << FP) | (1 << LR) | (1 << PC), 0);
+
+  if (offset != 0) {
+    // Adjust saved PC for any intrinsic code that could have been generated
+    // before a frame is created. Use PP as temp register.
+    __ ldr(PP, Address(FP, 2 * kWordSize));
+    __ AddImmediate(PP, PP, -offset);
+    __ str(PP, Address(FP, 2 * kWordSize));
+  }
+
+  // Setup pool pointer for this dart function.
+  const intptr_t object_pool_pc_dist =
+      Instr::kPCReadOffset - assembler->CodeSize() -
+      Instructions::HeaderSize() + Instructions::object_pool_offset();
+  __ ldr(PP, Address(PC, object_pool_pc_dist));
+
+  // Reserve space for locals.
+  __ AddImmediate(SP, -frame_size);
 }
 
 
+void AssemblerMacros::LeaveDartFrame(Assembler* assembler) {
+  __ LeaveFrame((1 << PP) | (1 << FP) | (1 << LR));
+  // Adjust SP for PC pushed in EnterDartFrame.
+  __ AddImmediate(SP, kWordSize);
+}
+
+
 void AssemblerMacros::EnterStubFrame(Assembler* assembler) {
-  UNIMPLEMENTED();
+  // Push 0 as saved PC for stub frames.
+  __ mov(IP, ShifterOperand(LR));
+  __ mov(LR, ShifterOperand(0));
+  __ EnterFrame((1 << FP) | (1 << IP) | (1 << LR), 0);
 }
 
+
+void AssemblerMacros::LeaveStubFrame(Assembler* assembler) {
+  __ LeaveFrame((1 << FP) | (1 << LR));
+  // Adjust SP for null PC pushed in EnterStubFrame.
+  __ AddImmediate(SP, kWordSize);
+}
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM