commit 9d4b6da934934c322536ee3309b63ce402740f49
author Igor Murashkin <iam@google.com> Fri Jul 29 09:51:58 2016 -0700
committer Igor Murashkin <iam@google.com> Tue Aug 16 20:19:36 2016 +0000
tree 9e7ee5023d6036b98e0560411bb0527efdedca01
parent 2af1aa066e3d20edd8fea5d5b6dbbbad73102d52

jni: Fast path for @FastNative annotated java methods

Adds a faster path for java methods annotated with
dalvik.annotation.optimization.FastNative .

Intended to replace usage of fast JNI (registering with "!(FOO)BAR" descriptors).

Performance Microbenchmark Results (Angler):
* Regular JNI cost in nanoseconds: 115
* Fast JNI cost in nanoseconds: 60
* @FastNative cost in nanoseconds: 36

Summary: Up to 67% faster (vs fast jni) JNI transition cost

Change-Id: Ic23823ae0f232270c068ec999fd89aa993894b0e

compiler/optimizing/optimizing_compiler.cc

diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index f7c82d1..6aaa15f 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -283,8 +283,13 @@
 
   CompiledMethod* JniCompile(uint32_t access_flags,
                              uint32_t method_idx,
-                             const DexFile& dex_file) const OVERRIDE {
-    return ArtQuickJniCompileMethod(GetCompilerDriver(), access_flags, method_idx, dex_file);
+                             const DexFile& dex_file,
+                             JniOptimizationFlags optimization_flags) const OVERRIDE {
+    return ArtQuickJniCompileMethod(GetCompilerDriver(),
+                                    access_flags,
+                                    method_idx,
+                                    dex_file,
+                                    optimization_flags);
   }
 
   uintptr_t GetEntryPointOf(ArtMethod* method) const OVERRIDE