Implement leaf runtime call stub on ARM and corresponding call redirection

runtime/vm/instructions_mips.cc

Index: runtime/vm/instructions_mips.cc
===================================================================
--- runtime/vm/instructions_mips.cc	(revision 19723)
+++ runtime/vm/instructions_mips.cc	(working copy)
@@ -5,50 +5,58 @@
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
+#include "vm/constants_mips.h"
 #include "vm/instructions.h"
 #include "vm/object.h"
 
 namespace dart {
 
-bool InstructionPattern::TestBytesWith(const int* data, int num_bytes) const {
-  UNIMPLEMENTED();
-  return false;
+CallPattern::CallPattern(uword pc, const Code& code)
+    : end_(reinterpret_cast<uword*>(pc)),
+      pool_index_(DecodePoolIndex()),
+      object_pool_(Array::Handle(code.ObjectPool())) { }
+
+
+uword CallPattern::Back(int n) const {
+  ASSERT(n > 0);
+  return *(end_ - n);
 }
 
 
-uword CallPattern::TargetAddress() const {
+int CallPattern::DecodePoolIndex() {
   UNIMPLEMENTED();
   return 0;
 }
 
 
-uword JumpPattern::TargetAddress() const {
+uword CallPattern::TargetAddress() const {
   UNIMPLEMENTED();
   return 0;
 }
 
 
-
-void CallPattern::SetTargetAddress(uword target) const {
+void CallPattern::SetTargetAddress(uword target_address) const {
   UNIMPLEMENTED();
 }
 
 
-void JumpPattern::SetTargetAddress(uword target) const {
+JumpPattern::JumpPattern(uword pc) : pc_(pc) { }
+
+
+bool JumpPattern::IsValid() const {
   UNIMPLEMENTED();
+  return false;
 }
 
 
-
-const int* CallPattern::pattern() const {
+uword JumpPattern::TargetAddress() const {
   UNIMPLEMENTED();
-  return NULL;
+  return 0;
 }
 
 
-const int* JumpPattern::pattern() const {
+void JumpPattern::SetTargetAddress(uword target_address) const {
   UNIMPLEMENTED();
-  return NULL;
 }
 
 }  // namespace dart