Early inlining of simple methods.

Inlining "special" methods: empty methods, methods returning
constants or their arguments, simple getters and setters.

Bug: 8164439
Change-Id: I8c7fa9c14351fbb2470000b378a22974daaef236

2 files changed, 14 insertions, 0 deletions

diff --git a/compiler/driver/compiler_driver-inl.h b/compiler/driver/compiler_driver-inl.h
index 664f809..d9f2a3a 100644
--- a/compiler/driver/compiler_driver-inl.h
+++ b/compiler/driver/compiler_driver-inl.h
@@ -289,6 +289,16 @@ inline int CompilerDriver::IsFastInvoke(
   return stats_flags;
 }
 
+inline bool CompilerDriver::NeedsClassInitialization(mirror::Class* referrer_class,
+                                                     mirror::ArtMethod* resolved_method) {
+  if (!resolved_method->IsStatic()) {
+    return false;
+  }
+  mirror::Class* methods_class = resolved_method->GetDeclaringClass();
+  // NOTE: Unlike in IsFastStaticField(), we don't check CanAssumeTypeIsPresentInDexCache() here.
+  return methods_class != referrer_class && !methods_class->IsInitialized();
+}
+
 }  // namespace art
 
 #endif  // ART_COMPILER_DRIVER_COMPILER_DRIVER_INL_H_
diff --git a/compiler/driver/compiler_driver.h b/compiler/driver/compiler_driver.h
index d88b2aa..256aa46 100644
--- a/compiler/driver/compiler_driver.h
+++ b/compiler/driver/compiler_driver.h
@@ -283,6 +283,10 @@ class CompilerDriver {
       uintptr_t* direct_code, uintptr_t* direct_method)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
+  // Does invokation of the resolved method need class initialization?
+  bool NeedsClassInitialization(mirror::Class* referrer_class, mirror::ArtMethod* resolved_method)
+    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
   void ProcessedInstanceField(bool resolved);
   void ProcessedStaticField(bool resolved, bool local);
   void ProcessedInvoke(InvokeType invoke_type, int flags);