Generate some intrinsics using our IR.

runtime/vm/intrinsifier_arm64.cc

Index: runtime/vm/intrinsifier_arm64.cc
===================================================================
--- runtime/vm/intrinsifier_arm64.cc	(revision 39651)
+++ runtime/vm/intrinsifier_arm64.cc	(working copy)
@@ -324,52 +324,6 @@
 }
 
 
-void Intrinsifier::Uint8ArrayGetIndexed(Assembler* assembler) {
-  Label fall_through;
-  __ ldr(R0, Address(SP, + 0 * kWordSize));  // Index.
-  __ ldr(R1, Address(SP, + 1 * kWordSize));  // Array.
-  __ tsti(R0, kSmiTagMask);
-  __ b(&fall_through, NE);  // Index is not a smi, fall through.
-
-  // Range check.
-  __ ldr(R6, FieldAddress(R1, TypedData::length_offset()));
-  __ cmp(R0, Operand(R6));
-  __ b(&fall_through, CS);
-
-  // Array element at R1 + R0 + TypedData::data_offset - 1.
-  // Untag R0.
-  __ add(R1, R1, Operand(R0, LSR, 1));
-  __ ldr(R0, FieldAddress(R1, TypedData::data_offset()), kUnsignedByte);
-  __ SmiTag(R0);
-  __ ret();
-  __ Bind(&fall_through);
-}
-
-
-void Intrinsifier::ExternalUint8ArrayGetIndexed(Assembler* assembler) {
-  Label fall_through;
-
-  __ ldr(R0, Address(SP, + 0 * kWordSize));  // Index.
-  __ ldr(R1, Address(SP, + 1 * kWordSize));  // Array.
-  __ tsti(R0, kSmiTagMask);
-  __ b(&fall_through, NE);  // Index is not a smi, fall through.
-
-  // Range check.
-  __ ldr(R6, FieldAddress(R1, TypedData::length_offset()));
-  __ cmp(R0, Operand(R6));
-  __ b(&fall_through, CS);
-
-  __ ldr(R1, FieldAddress(R1, ExternalTypedData::data_offset()));
-
-  // Untag R0.
-  __ add(R1, R1, Operand(R0, LSR, 1));
-  __ ldr(R0, Address(R1, 0), kUnsignedByte);
-  __ SmiTag(R0);
-  __ ret();
-  __ Bind(&fall_through);
-}
-
-
 void Intrinsifier::Float64ArrayGetIndexed(Assembler* assembler) {
   Label fall_through;
   __ ldr(R0, Address(SP, + 0 * kWordSize));  // Index.