In class Function replace current code field with current instruction field, that way we save one l…

runtime/vm/stub_code_arm64.cc

Index: runtime/vm/stub_code_arm64.cc
===================================================================
--- runtime/vm/stub_code_arm64.cc	(revision 36916)
+++ runtime/vm/stub_code_arm64.cc	(working copy)
@@ -598,8 +598,7 @@
   __ LeaveStubFrame();
 
   // Tail-call to target function.
-  __ LoadFieldFromOffset(R2, R0, Function::code_offset(), kNoPP);
-  __ LoadFieldFromOffset(R2, R2, Code::instructions_offset(), kNoPP);
+  __ LoadFieldFromOffset(R2, R0, Function::instructions_offset(), kNoPP);
   __ AddImmediate(R2, R2, Instructions::HeaderSize() - kHeapObjectTag, PP);
   __ br(R2);
 }
@@ -1478,8 +1477,7 @@
 
   __ Bind(&call_target_function);
   // R0: target function.
-  __ LoadFieldFromOffset(R2, R0, Function::code_offset(), kNoPP);
-  __ LoadFieldFromOffset(R2, R2, Code::instructions_offset(), kNoPP);
+  __ LoadFieldFromOffset(R2, R0, Function::instructions_offset(), kNoPP);
   __ AddImmediate(
       R2, R2, Instructions::HeaderSize() - kHeapObjectTag, kNoPP);
   __ br(R2);
@@ -1602,11 +1600,10 @@
 
   // Get function and call it, if possible.
   __ LoadFromOffset(R0, R6, target_offset, kNoPP);
-  __ LoadFieldFromOffset(R2, R0, Function::code_offset(), kNoPP);
+  __ LoadFieldFromOffset(R2, R0, Function::instructions_offset(), kNoPP);
 
   // R0: function.
-  // R2: target code.
-  __ LoadFieldFromOffset(R2, R2, Code::instructions_offset(), kNoPP);
+  // R2: target instructons.
   __ AddImmediate(
       R2, R2, Instructions::HeaderSize() - kHeapObjectTag, kNoPP);
   __ br(R2);
@@ -1636,8 +1633,7 @@
   __ Pop(R5);  // Restore IC Data.
   __ LeaveStubFrame();
 
-  __ LoadFieldFromOffset(R2, R0, Function::code_offset(), kNoPP);
-  __ LoadFieldFromOffset(R2, R2, Code::instructions_offset(), kNoPP);
+  __ LoadFieldFromOffset(R2, R0, Function::instructions_offset(), kNoPP);
   __ AddImmediate(
       R2, R2, Instructions::HeaderSize() - kHeapObjectTag, kNoPP);
   __ br(R2);