Reduce how often we call FindDexCache

Before host boot.oat -j4 optimizing compile:
real  1m17.792s
user  3m26.140s
sys 0m8.340s

After:
real  1m12.324s
user  3m22.718s
sys 0m8.320s

Change-Id: If18e9e79e06cdf1676692e5efacb682bf93889c3
diff --git a/compiler/optimizing/builder.cc b/compiler/optimizing/builder.cc
index 23ab94e..1650fd1 100644
--- a/compiler/optimizing/builder.cc
+++ b/compiler/optimizing/builder.cc
@@ -1205,7 +1205,8 @@
         resolved_field->GetOffset(),
         resolved_field->IsVolatile(),
         field_index,
-        *dex_file_));
+        *dex_file_,
+        dex_compilation_unit_->GetDexCache()));
   } else {
     current_block_->AddInstruction(new (arena_) HInstanceFieldGet(
         current_block_->GetLastInstruction(),
@@ -1213,7 +1214,8 @@
         resolved_field->GetOffset(),
         resolved_field->IsVolatile(),
         field_index,
-        *dex_file_));
+        *dex_file_,
+        dex_compilation_unit_->GetDexCache()));
 
     UpdateLocal(source_or_dest_reg, current_block_->GetLastInstruction());
   }
@@ -1334,14 +1336,16 @@
                                                                 resolved_field->GetOffset(),
                                                                 resolved_field->IsVolatile(),
                                                                 field_index,
-                                                                *dex_file_));
+                                                                *dex_file_,
+                                                                dex_cache_));
   } else {
     current_block_->AddInstruction(new (arena_) HStaticFieldGet(cls,
                                                                 field_type,
                                                                 resolved_field->GetOffset(),
                                                                 resolved_field->IsVolatile(),
                                                                 field_index,
-                                                                *dex_file_));
+                                                                *dex_file_,
+                                                                dex_cache_));
     UpdateLocal(source_or_dest_reg, current_block_->GetLastInstruction());
   }
   return true;
diff --git a/compiler/optimizing/builder.h b/compiler/optimizing/builder.h
index d6b25ee..560ed86 100644
--- a/compiler/optimizing/builder.h
+++ b/compiler/optimizing/builder.h
@@ -40,7 +40,8 @@
                 const DexFile* dex_file,
                 CompilerDriver* driver,
                 OptimizingCompilerStats* compiler_stats,
-                const uint8_t* interpreter_metadata)
+                const uint8_t* interpreter_metadata,
+                Handle<mirror::DexCache> dex_cache)
       : arena_(graph->GetArena()),
         branch_targets_(graph->GetArena(), 0),
         locals_(graph->GetArena(), 0),
@@ -57,7 +58,8 @@
         latest_result_(nullptr),
         can_use_baseline_for_string_init_(true),
         compilation_stats_(compiler_stats),
-        interpreter_metadata_(interpreter_metadata) {}
+        interpreter_metadata_(interpreter_metadata),
+        dex_cache_(dex_cache) {}
 
   // Only for unit testing.
   HGraphBuilder(HGraph* graph, Primitive::Type return_type = Primitive::kPrimInt)
@@ -77,7 +79,8 @@
         latest_result_(nullptr),
         can_use_baseline_for_string_init_(true),
         compilation_stats_(nullptr),
-        interpreter_metadata_(nullptr) {}
+        interpreter_metadata_(nullptr),
+        dex_cache_(NullHandle<mirror::DexCache>()) {}
 
   bool BuildGraph(const DexFile::CodeItem& code);
 
@@ -334,6 +337,9 @@
 
   const uint8_t* interpreter_metadata_;
 
+  // Dex cache for dex_file_.
+  Handle<mirror::DexCache> dex_cache_;
+
   DISALLOW_COPY_AND_ASSIGN(HGraphBuilder);
 };
 
diff --git a/compiler/optimizing/gvn_test.cc b/compiler/optimizing/gvn_test.cc
index 42ef3ff..32f45b5 100644
--- a/compiler/optimizing/gvn_test.cc
+++ b/compiler/optimizing/gvn_test.cc
@@ -28,6 +28,7 @@
 TEST(GVNTest, LocalFieldElimination) {
   ArenaPool pool;
   ArenaAllocator allocator(&pool);
+  NullHandle<mirror::DexCache> dex_cache;
 
   HGraph* graph = CreateGraph(&allocator);
   HBasicBlock* entry = new (&allocator) HBasicBlock(graph);
@@ -45,20 +46,23 @@
                                                            MemberOffset(42),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
   block->AddInstruction(new (&allocator) HInstanceFieldGet(parameter,
                                                            Primitive::kPrimNot,
                                                            MemberOffset(42),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
   HInstruction* to_remove = block->GetLastInstruction();
   block->AddInstruction(new (&allocator) HInstanceFieldGet(parameter,
                                                            Primitive::kPrimNot,
                                                            MemberOffset(43),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
   HInstruction* different_offset = block->GetLastInstruction();
   // Kill the value.
   block->AddInstruction(new (&allocator) HInstanceFieldSet(parameter,
@@ -67,13 +71,15 @@
                                                            MemberOffset(42),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
   block->AddInstruction(new (&allocator) HInstanceFieldGet(parameter,
                                                            Primitive::kPrimNot,
                                                            MemberOffset(42),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
   HInstruction* use_after_kill = block->GetLastInstruction();
   block->AddInstruction(new (&allocator) HExit());
 
@@ -94,6 +100,7 @@
 TEST(GVNTest, GlobalFieldElimination) {
   ArenaPool pool;
   ArenaAllocator allocator(&pool);
+  NullHandle<mirror::DexCache> dex_cache;
 
   HGraph* graph = CreateGraph(&allocator);
   HBasicBlock* entry = new (&allocator) HBasicBlock(graph);
@@ -110,7 +117,8 @@
                                                            MemberOffset(42),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
 
   block->AddInstruction(new (&allocator) HIf(block->GetLastInstruction()));
   HBasicBlock* then = new (&allocator) HBasicBlock(graph);
@@ -130,21 +138,24 @@
                                                           MemberOffset(42),
                                                           false,
                                                           kUnknownFieldIndex,
-                                                          graph->GetDexFile()));
+                                                          graph->GetDexFile(),
+                                                          dex_cache));
   then->AddInstruction(new (&allocator) HGoto());
   else_->AddInstruction(new (&allocator) HInstanceFieldGet(parameter,
                                                            Primitive::kPrimBoolean,
                                                            MemberOffset(42),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
   else_->AddInstruction(new (&allocator) HGoto());
   join->AddInstruction(new (&allocator) HInstanceFieldGet(parameter,
                                                           Primitive::kPrimBoolean,
                                                           MemberOffset(42),
                                                           false,
                                                           kUnknownFieldIndex,
-                                                          graph->GetDexFile()));
+                                                          graph->GetDexFile(),
+                                                          dex_cache));
   join->AddInstruction(new (&allocator) HExit());
 
   graph->TryBuildingSsa();
@@ -161,6 +172,7 @@
 TEST(GVNTest, LoopFieldElimination) {
   ArenaPool pool;
   ArenaAllocator allocator(&pool);
+  NullHandle<mirror::DexCache> dex_cache;
 
   HGraph* graph = CreateGraph(&allocator);
   HBasicBlock* entry = new (&allocator) HBasicBlock(graph);
@@ -178,7 +190,8 @@
                                                            MemberOffset(42),
                                                            false,
                                                            kUnknownFieldIndex,
-                                                           graph->GetDexFile()));
+                                                           graph->GetDexFile(),
+                                                           dex_cache));
   block->AddInstruction(new (&allocator) HGoto());
 
   HBasicBlock* loop_header = new (&allocator) HBasicBlock(graph);
@@ -198,7 +211,8 @@
                                                                  MemberOffset(42),
                                                                  false,
                                                                  kUnknownFieldIndex,
-                                                                 graph->GetDexFile()));
+                                                                 graph->GetDexFile(),
+                                                                 dex_cache));
   HInstruction* field_get_in_loop_header = loop_header->GetLastInstruction();
   loop_header->AddInstruction(new (&allocator) HIf(block->GetLastInstruction()));
 
@@ -210,14 +224,16 @@
                                                                MemberOffset(42),
                                                                false,
                                                                kUnknownFieldIndex,
-                                                               graph->GetDexFile()));
+                                                               graph->GetDexFile(),
+                                                               dex_cache));
   HInstruction* field_set = loop_body->GetLastInstruction();
   loop_body->AddInstruction(new (&allocator) HInstanceFieldGet(parameter,
                                                                Primitive::kPrimBoolean,
                                                                MemberOffset(42),
                                                                false,
                                                                kUnknownFieldIndex,
-                                                               graph->GetDexFile()));
+                                                               graph->GetDexFile(),
+                                                               dex_cache));
   HInstruction* field_get_in_loop_body = loop_body->GetLastInstruction();
   loop_body->AddInstruction(new (&allocator) HGoto());
 
@@ -226,7 +242,8 @@
                                                           MemberOffset(42),
                                                           false,
                                                           kUnknownFieldIndex,
-                                                          graph->GetDexFile()));
+                                                          graph->GetDexFile(),
+                                                          dex_cache));
   HInstruction* field_get_in_exit = exit->GetLastInstruction();
   exit->AddInstruction(new (&allocator) HExit());
 
@@ -265,6 +282,7 @@
 TEST(GVNTest, LoopSideEffects) {
   ArenaPool pool;
   ArenaAllocator allocator(&pool);
+  NullHandle<mirror::DexCache> dex_cache;
 
   static const SideEffects kCanTriggerGC = SideEffects::CanTriggerGC();
 
@@ -320,7 +338,8 @@
                                                              MemberOffset(42),
                                                              false,
                                                              kUnknownFieldIndex,
-                                                             graph->GetDexFile()));
+                                                             graph->GetDexFile(),
+                                                             dex_cache));
 
     SideEffectsAnalysis side_effects(graph);
     side_effects.Run();
@@ -342,7 +361,8 @@
                                            MemberOffset(42),
                                            false,
                                            kUnknownFieldIndex,
-                                           graph->GetDexFile()),
+                                           graph->GetDexFile(),
+                                           dex_cache),
         outer_loop_body->GetLastInstruction());
 
     SideEffectsAnalysis side_effects(graph);
@@ -365,7 +385,8 @@
                                            MemberOffset(42),
                                            false,
                                            kUnknownFieldIndex,
-                                           graph->GetDexFile()),
+                                           graph->GetDexFile(),
+                                           dex_cache),
         inner_loop_body->GetLastInstruction());
 
     SideEffectsAnalysis side_effects(graph);
diff --git a/compiler/optimizing/inliner.cc b/compiler/optimizing/inliner.cc
index 112d42e..b5870ae 100644
--- a/compiler/optimizing/inliner.cc
+++ b/compiler/optimizing/inliner.cc
@@ -182,10 +182,13 @@
   ArtMethod* resolved_method;
   if (invoke_instruction->IsInvokeStaticOrDirect()) {
     MethodReference ref = invoke_instruction->AsInvokeStaticOrDirect()->GetTargetMethod();
-    resolved_method = class_linker->FindDexCache(soa.Self(), *ref.dex_file)->GetResolvedMethod(
+    mirror::DexCache* const dex_cache = (&caller_dex_file == ref.dex_file)
+        ? caller_compilation_unit_.GetDexCache().Get()
+        : class_linker->FindDexCache(soa.Self(), *ref.dex_file);
+    resolved_method = dex_cache->GetResolvedMethod(
         ref.dex_method_index, class_linker->GetImagePointerSize());
   } else {
-    resolved_method = class_linker->FindDexCache(soa.Self(), caller_dex_file)->GetResolvedMethod(
+    resolved_method = caller_compilation_unit_.GetDexCache().Get()->GetResolvedMethod(
         method_index, class_linker->GetImagePointerSize());
   }
 
@@ -273,6 +276,7 @@
   const DexFile& callee_dex_file = *resolved_method->GetDexFile();
   uint32_t method_index = resolved_method->GetDexMethodIndex();
   ClassLinker* class_linker = caller_compilation_unit_.GetClassLinker();
+  Handle<mirror::DexCache> dex_cache(handles_->NewHandle(resolved_method->GetDexCache()));
   DexCompilationUnit dex_compilation_unit(
     nullptr,
     caller_compilation_unit_.GetClassLoader(),
@@ -282,7 +286,8 @@
     resolved_method->GetDeclaringClass()->GetDexClassDefIndex(),
     method_index,
     resolved_method->GetAccessFlags(),
-    compiler_driver_->GetVerifiedMethod(&callee_dex_file, method_index));
+    compiler_driver_->GetVerifiedMethod(&callee_dex_file, method_index),
+    dex_cache);
 
   bool requires_ctor_barrier = false;
 
@@ -326,7 +331,8 @@
                         resolved_method->GetDexFile(),
                         compiler_driver_,
                         &inline_stats,
-                        resolved_method->GetQuickenedInfo());
+                        resolved_method->GetQuickenedInfo(),
+                        dex_cache);
 
   if (!builder.BuildGraph(*code_item)) {
     VLOG(compiler) << "Method " << PrettyMethod(method_index, callee_dex_file)
diff --git a/compiler/optimizing/licm_test.cc b/compiler/optimizing/licm_test.cc
index 2fc66e6..bc4a663 100644
--- a/compiler/optimizing/licm_test.cc
+++ b/compiler/optimizing/licm_test.cc
@@ -120,13 +120,14 @@
   BuildLoop();
 
   // Populate the loop with instructions: set/get field with different types.
+  NullHandle<mirror::DexCache> dex_cache;
   HInstruction* get_field = new (&allocator_) HInstanceFieldGet(
       parameter_, Primitive::kPrimLong, MemberOffset(10),
-      false, kUnknownFieldIndex, graph_->GetDexFile());
+      false, kUnknownFieldIndex, graph_->GetDexFile(), dex_cache);
   loop_body_->InsertInstructionBefore(get_field, loop_body_->GetLastInstruction());
   HInstruction* set_field = new (&allocator_) HInstanceFieldSet(
       parameter_, constant_, Primitive::kPrimInt, MemberOffset(20),
-      false, kUnknownFieldIndex, graph_->GetDexFile());
+      false, kUnknownFieldIndex, graph_->GetDexFile(), dex_cache);
   loop_body_->InsertInstructionBefore(set_field, loop_body_->GetLastInstruction());
 
   EXPECT_EQ(get_field->GetBlock(), loop_body_);
@@ -140,13 +141,14 @@
   BuildLoop();
 
   // Populate the loop with instructions: set/get field with same types.
+  NullHandle<mirror::DexCache> dex_cache;
   HInstruction* get_field = new (&allocator_) HInstanceFieldGet(
       parameter_, Primitive::kPrimLong, MemberOffset(10),
-      false, kUnknownFieldIndex, graph_->GetDexFile());
+      false, kUnknownFieldIndex, graph_->GetDexFile(), dex_cache);
   loop_body_->InsertInstructionBefore(get_field, loop_body_->GetLastInstruction());
   HInstruction* set_field = new (&allocator_) HInstanceFieldSet(
       parameter_, get_field, Primitive::kPrimLong, MemberOffset(10),
-      false, kUnknownFieldIndex, graph_->GetDexFile());
+      false, kUnknownFieldIndex, graph_->GetDexFile(), dex_cache);
   loop_body_->InsertInstructionBefore(set_field, loop_body_->GetLastInstruction());
 
   EXPECT_EQ(get_field->GetBlock(), loop_body_);
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 2ed2d9a..1470e10 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -58,6 +58,10 @@
 class SlowPathCode;
 class SsaBuilder;
 
+namespace mirror {
+class DexCache;
+}  // namespace mirror
+
 static const int kDefaultNumberOfBlocks = 8;
 static const int kDefaultNumberOfSuccessors = 2;
 static const int kDefaultNumberOfPredecessors = 2;
@@ -4020,25 +4024,29 @@
             Primitive::Type field_type,
             bool is_volatile,
             uint32_t index,
-            const DexFile& dex_file)
+            const DexFile& dex_file,
+            Handle<mirror::DexCache> dex_cache)
       : field_offset_(field_offset),
         field_type_(field_type),
         is_volatile_(is_volatile),
         index_(index),
-        dex_file_(dex_file) {}
+        dex_file_(dex_file),
+        dex_cache_(dex_cache) {}
 
   MemberOffset GetFieldOffset() const { return field_offset_; }
   Primitive::Type GetFieldType() const { return field_type_; }
   uint32_t GetFieldIndex() const { return index_; }
   const DexFile& GetDexFile() const { return dex_file_; }
   bool IsVolatile() const { return is_volatile_; }
+  Handle<mirror::DexCache> GetDexCache() const { return dex_cache_; }
 
  private:
   const MemberOffset field_offset_;
   const Primitive::Type field_type_;
   const bool is_volatile_;
-  uint32_t index_;
+  const uint32_t index_;
   const DexFile& dex_file_;
+  const Handle<mirror::DexCache> dex_cache_;
 };
 
 class HInstanceFieldGet : public HExpression<1> {
@@ -4048,11 +4056,12 @@
                     MemberOffset field_offset,
                     bool is_volatile,
                     uint32_t field_idx,
-                    const DexFile& dex_file)
+                    const DexFile& dex_file,
+                    Handle<mirror::DexCache> dex_cache)
       : HExpression(
             field_type,
             SideEffects::FieldReadOfType(field_type, is_volatile)),
-        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file) {
+        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file, dex_cache) {
     SetRawInputAt(0, value);
   }
 
@@ -4092,10 +4101,11 @@
                     MemberOffset field_offset,
                     bool is_volatile,
                     uint32_t field_idx,
-                    const DexFile& dex_file)
+                    const DexFile& dex_file,
+                    Handle<mirror::DexCache> dex_cache)
       : HTemplateInstruction(
           SideEffects::FieldWriteOfType(field_type, is_volatile)),
-        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file),
+        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file, dex_cache),
         value_can_be_null_(true) {
     SetRawInputAt(0, object);
     SetRawInputAt(1, value);
@@ -4510,11 +4520,12 @@
                   MemberOffset field_offset,
                   bool is_volatile,
                   uint32_t field_idx,
-                  const DexFile& dex_file)
+                  const DexFile& dex_file,
+                  Handle<mirror::DexCache> dex_cache)
       : HExpression(
             field_type,
             SideEffects::FieldReadOfType(field_type, is_volatile)),
-        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file) {
+        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file, dex_cache) {
     SetRawInputAt(0, cls);
   }
 
@@ -4551,10 +4562,11 @@
                   MemberOffset field_offset,
                   bool is_volatile,
                   uint32_t field_idx,
-                  const DexFile& dex_file)
+                  const DexFile& dex_file,
+                  Handle<mirror::DexCache> dex_cache)
       : HTemplateInstruction(
           SideEffects::FieldWriteOfType(field_type, is_volatile)),
-        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file),
+        field_info_(field_offset, field_type, is_volatile, field_idx, dex_file, dex_cache),
         value_can_be_null_(true) {
     SetRawInputAt(0, cls);
     SetRawInputAt(1, value);
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 6f251e8..7044a87 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -243,7 +243,8 @@
                           uint16_t class_def_idx,
                           uint32_t method_idx,
                           jobject class_loader,
-                          const DexFile& dex_file) const OVERRIDE;
+                          const DexFile& dex_file,
+                          Handle<mirror::DexCache> dex_cache) const OVERRIDE;
 
   CompiledMethod* TryCompile(const DexFile::CodeItem* code_item,
                              uint32_t access_flags,
@@ -251,7 +252,8 @@
                              uint16_t class_def_idx,
                              uint32_t method_idx,
                              jobject class_loader,
-                             const DexFile& dex_file) const;
+                             const DexFile& dex_file,
+                             Handle<mirror::DexCache> dex_cache) const;
 
   CompiledMethod* JniCompile(uint32_t access_flags,
                              uint32_t method_idx,
@@ -638,7 +640,8 @@
                                                uint16_t class_def_idx,
                                                uint32_t method_idx,
                                                jobject class_loader,
-                                               const DexFile& dex_file) const {
+                                               const DexFile& dex_file,
+                                               Handle<mirror::DexCache> dex_cache) const {
   UNUSED(invoke_type);
   std::string method_name = PrettyMethod(method_idx, dex_file);
   MaybeRecordStat(MethodCompilationStat::kAttemptCompilation);
@@ -674,7 +677,7 @@
   DexCompilationUnit dex_compilation_unit(
     nullptr, class_loader, Runtime::Current()->GetClassLinker(), dex_file, code_item,
     class_def_idx, method_idx, access_flags,
-    compiler_driver->GetVerifiedMethod(&dex_file, method_idx));
+    compiler_driver->GetVerifiedMethod(&dex_file, method_idx), dex_cache);
 
   bool requires_barrier = dex_compilation_unit.IsConstructor()
       && compiler_driver->RequiresConstructorBarrier(Thread::Current(),
@@ -712,10 +715,7 @@
   const uint8_t* interpreter_metadata = nullptr;
   {
     ScopedObjectAccess soa(Thread::Current());
-    StackHandleScope<4> hs(soa.Self());
-    ClassLinker* class_linker = dex_compilation_unit.GetClassLinker();
-    Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(
-        soa.Self(), dex_file)));
+    StackHandleScope<1> hs(soa.Self());
     Handle<mirror::ClassLoader> loader(hs.NewHandle(
         soa.Decode<mirror::ClassLoader*>(class_loader)));
     ArtMethod* art_method = compiler_driver->ResolveMethod(
@@ -732,7 +732,8 @@
                         &dex_file,
                         compiler_driver,
                         compilation_stats_.get(),
-                        interpreter_metadata);
+                        interpreter_metadata,
+                        dex_cache);
 
   VLOG(compiler) << "Building " << method_name;
 
@@ -798,13 +799,14 @@
                                             uint16_t class_def_idx,
                                             uint32_t method_idx,
                                             jobject jclass_loader,
-                                            const DexFile& dex_file) const {
+                                            const DexFile& dex_file,
+                                            Handle<mirror::DexCache> dex_cache) const {
   CompilerDriver* compiler_driver = GetCompilerDriver();
   CompiledMethod* method = nullptr;
   DCHECK(!compiler_driver->GetVerifiedMethod(&dex_file, method_idx)->HasRuntimeThrow());
   if (compiler_driver->IsMethodVerifiedWithoutFailures(method_idx, class_def_idx, dex_file)) {
      method = TryCompile(code_item, access_flags, invoke_type, class_def_idx,
-                         method_idx, jclass_loader, dex_file);
+                         method_idx, jclass_loader, dex_file, dex_cache);
   } else {
     if (compiler_driver->GetCompilerOptions().VerifyAtRuntime()) {
       MaybeRecordStat(MethodCompilationStat::kNotCompiledVerifyAtRuntime);
@@ -817,7 +819,7 @@
     return method;
   }
   method = delegate_->Compile(code_item, access_flags, invoke_type, class_def_idx, method_idx,
-                              jclass_loader, dex_file);
+                              jclass_loader, dex_file, dex_cache);
 
   if (method != nullptr) {
     MaybeRecordStat(MethodCompilationStat::kCompiledQuick);
diff --git a/compiler/optimizing/reference_type_propagation.cc b/compiler/optimizing/reference_type_propagation.cc
index 516638b..b887b89 100644
--- a/compiler/optimizing/reference_type_propagation.cc
+++ b/compiler/optimizing/reference_type_propagation.cc
@@ -434,8 +434,7 @@
 
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
-  mirror::DexCache* dex_cache = cl->FindDexCache(soa.Self(), info.GetDexFile(), false);
-  ArtField* field = cl->GetResolvedField(info.GetFieldIndex(), dex_cache);
+  ArtField* field = cl->GetResolvedField(info.GetFieldIndex(), info.GetDexCache().Get());
   // TODO: There are certain cases where we can't resolve the field.
   // b/21914925 is open to keep track of a repro case for this issue.
   mirror::Class* klass = (field == nullptr) ? nullptr : field->GetType<false>();
diff --git a/compiler/optimizing/register_allocator_test.cc b/compiler/optimizing/register_allocator_test.cc
index b7da362..965a8df 100644
--- a/compiler/optimizing/register_allocator_test.cc
+++ b/compiler/optimizing/register_allocator_test.cc
@@ -472,6 +472,7 @@
                                   HInstruction** input2) {
   HGraph* graph = CreateGraph(allocator);
   HBasicBlock* entry = new (allocator) HBasicBlock(graph);
+  NullHandle<mirror::DexCache> dex_cache;
   graph->AddBlock(entry);
   graph->SetEntryBlock(entry);
   HInstruction* parameter = new (allocator) HParameterValue(0, Primitive::kPrimNot);
@@ -486,7 +487,8 @@
                                                          MemberOffset(22),
                                                          false,
                                                          kUnknownFieldIndex,
-                                                         graph->GetDexFile());
+                                                         graph->GetDexFile(),
+                                                         dex_cache);
   block->AddInstruction(test);
   block->AddInstruction(new (allocator) HIf(test));
   HBasicBlock* then = new (allocator) HBasicBlock(graph);
@@ -510,13 +512,15 @@
                                               MemberOffset(42),
                                               false,
                                               kUnknownFieldIndex,
-                                              graph->GetDexFile());
+                                              graph->GetDexFile(),
+                                              dex_cache);
 *input2 = new (allocator) HInstanceFieldGet(parameter,
                                             Primitive::kPrimInt,
                                             MemberOffset(42),
                                             false,
                                             kUnknownFieldIndex,
-                                            graph->GetDexFile());
+                                            graph->GetDexFile(),
+                                            dex_cache);
   then->AddInstruction(*input1);
   else_->AddInstruction(*input2);
   join->AddInstruction(new (allocator) HExit());
@@ -613,6 +617,7 @@
                                 HInstruction** field,
                                 HInstruction** ret) {
   HGraph* graph = CreateGraph(allocator);
+  NullHandle<mirror::DexCache> dex_cache;
   HBasicBlock* entry = new (allocator) HBasicBlock(graph);
   graph->AddBlock(entry);
   graph->SetEntryBlock(entry);
@@ -628,7 +633,8 @@
                                              MemberOffset(42),
                                              false,
                                              kUnknownFieldIndex,
-                                             graph->GetDexFile());
+                                             graph->GetDexFile(),
+                                             dex_cache);
   block->AddInstruction(*field);
   *ret = new (allocator) HReturn(*field);
   block->AddInstruction(*ret);