Polymorphic inlining for some recognized methods in the optimizing compiler.

runtime/vm/intrinsifier_x64.cc

Index: runtime/vm/intrinsifier_x64.cc
===================================================================
--- runtime/vm/intrinsifier_x64.cc	(revision 25997)
+++ runtime/vm/intrinsifier_x64.cc	(working copy)
@@ -136,19 +136,6 @@
 }
 
 
-bool Intrinsifier::Array_getLength(Assembler* assembler) {
-  __ movq(RAX, Address(RSP, + 1 * kWordSize));
-  __ movq(RAX, FieldAddress(RAX, Array::length_offset()));
-  __ ret();
-  return true;
-}
-
-
-bool Intrinsifier::ImmutableArray_getLength(Assembler* assembler) {
-  return Array_getLength(assembler);
-}
-
-
 bool Intrinsifier::Array_getIndexed(Assembler* assembler) {
   Label fall_through;
   __ movq(RCX, Address(RSP, + 1 * kWordSize));  // Index.
@@ -271,16 +258,6 @@
 }
 
 
-// Get length of growable object array.
-// On stack: growable array (+1), return-address (+0).
-bool Intrinsifier::GrowableArray_getLength(Assembler* assembler) {
-  __ movq(RAX, Address(RSP, + 1 * kWordSize));
-  __ movq(RAX, FieldAddress(RAX, GrowableObjectArray::length_offset()));
-  __ ret();
-  return true;
-}
-
-
 bool Intrinsifier::GrowableArray_getCapacity(Assembler* assembler) {
   __ movq(RAX, Address(RSP, + 1 * kWordSize));
   __ movq(RAX, FieldAddress(RAX, GrowableObjectArray::data_offset()));
@@ -510,18 +487,6 @@
   __ Bind(&fall_through);                                                      \
 
 
-// Gets the length of a TypedData.
-bool Intrinsifier::TypedData_getLength(Assembler* assembler) {
-  __ movq(RAX, Address(RSP, + 1 * kWordSize));
-  __ movq(RAX, FieldAddress(RAX, TypedData::length_offset()));
-  __ ret();
-  // Generate enough code to satisfy patchability constraint.
-  intptr_t offset = __ CodeSize();
-  __ nop(JumpPattern::InstructionLength() - offset);
-  return true;
-}
-
-
 static ScaleFactor GetScaleFactor(intptr_t size) {
   switch (size) {
     case 1: return TIMES_1;
@@ -1418,14 +1383,6 @@
 }
 
 
-bool Intrinsifier::String_getLength(Assembler* assembler) {
-  __ movq(RAX, Address(RSP, + 1 * kWordSize));  // String object.
-  __ movq(RAX, FieldAddress(RAX, String::length_offset()));
-  __ ret();
-  return true;
-}
-
-
 bool Intrinsifier::String_codeUnitAt(Assembler* assembler) {
   Label fall_through, try_two_byte_string;
   __ movq(RCX, Address(RSP, + 1 * kWordSize));  // Index.