MIPS32: peek*/poke*, and String.charAt intrinsics.

- byte libcore.io.Memory.peekByte(long address)
- short libcore.io.Memory.peekShort(long address)
- int libcore.io.Memory.peekInt(long address)
- long libcore.io.Memory.peekLong(long address)
- void libcore.io.Memory.pokeByte(long address, byte value)
- void libcore.io.Memory.pokeShort(long address, short value)
- void libcore.io.Memory.pokeInt(long address, int value)
- void libcore.io.Memory.pokeLong(long address, long value)
- char java.lang.String.charAt(int index)

Change-Id: I5ff30b61d87313d00f0fd3f0ee09f1c454f9c9fa
diff --git a/compiler/optimizing/code_generator_mips.cc b/compiler/optimizing/code_generator_mips.cc
index e9c0b6a..c450866 100644
--- a/compiler/optimizing/code_generator_mips.cc
+++ b/compiler/optimizing/code_generator_mips.cc
@@ -3993,28 +3993,19 @@
   codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
 }
 
-void InstructionCodeGeneratorMIPS::VisitInvokeVirtual(HInvokeVirtual* invoke) {
-  if (TryGenerateIntrinsicCode(invoke, codegen_)) {
-    return;
-  }
-
+void CodeGeneratorMIPS::GenerateVirtualCall(HInvokeVirtual* invoke, Location temp_location) {
   LocationSummary* locations = invoke->GetLocations();
   Location receiver = locations->InAt(0);
-  Register temp = invoke->GetLocations()->GetTemp(0).AsRegister<Register>();
+  Register temp = temp_location.AsRegister<Register>();
   size_t method_offset = mirror::Class::EmbeddedVTableEntryOffset(
       invoke->GetVTableIndex(), kMipsPointerSize).SizeValue();
   uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
   Offset entry_point = ArtMethod::EntryPointFromQuickCompiledCodeOffset(kMipsWordSize);
 
   // temp = object->GetClass();
-  if (receiver.IsStackSlot()) {
-    __ LoadFromOffset(kLoadWord, temp, SP, receiver.GetStackIndex());
-    __ LoadFromOffset(kLoadWord, temp, temp, class_offset);
-  } else {
-    DCHECK(receiver.IsRegister());
-    __ LoadFromOffset(kLoadWord, temp, receiver.AsRegister<Register>(), class_offset);
-  }
-  codegen_->MaybeRecordImplicitNullCheck(invoke);
+  DCHECK(receiver.IsRegister());
+  __ LoadFromOffset(kLoadWord, temp, receiver.AsRegister<Register>(), class_offset);
+  MaybeRecordImplicitNullCheck(invoke);
   // temp = temp->GetMethodAt(method_offset);
   __ LoadFromOffset(kLoadWord, temp, temp, method_offset);
   // T9 = temp->GetEntryPoint();
@@ -4022,6 +4013,14 @@
   // T9();
   __ Jalr(T9);
   __ Nop();
+}
+
+void InstructionCodeGeneratorMIPS::VisitInvokeVirtual(HInvokeVirtual* invoke) {
+  if (TryGenerateIntrinsicCode(invoke, codegen_)) {
+    return;
+  }
+
+  codegen_->GenerateVirtualCall(invoke, invoke->GetLocations()->GetTemp(0));
   DCHECK(!codegen_->IsLeafMethod());
   codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
 }