[optimizing] Don't rely on the verifier for String.<init>.

Continue work on cutting the dependency on the verifier.

Change-Id: I0f95b1eb2e10fd8f6bf54817f1202bdf6dfdb0fe
diff --git a/compiler/optimizing/code_generator_mips64.cc b/compiler/optimizing/code_generator_mips64.cc
index aa4fd26..e7d2ec6 100644
--- a/compiler/optimizing/code_generator_mips64.cc
+++ b/compiler/optimizing/code_generator_mips64.cc
@@ -3292,5 +3292,17 @@
   VisitCondition(comp);
 }
 
+void LocationsBuilderMIPS64::VisitFakeString(HFakeString* instruction) {
+  DCHECK(codegen_->IsBaseline());
+  LocationSummary* locations =
+      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
+  locations->SetOut(Location::ConstantLocation(GetGraph()->GetNullConstant()));
+}
+
+void InstructionCodeGeneratorMIPS64::VisitFakeString(HFakeString* instruction ATTRIBUTE_UNUSED) {
+  DCHECK(codegen_->IsBaseline());
+  // Will be generated at use site.
+}
+
 }  // namespace mips64
 }  // namespace art