ART: Intrinsic implementation for java.lang.System.arraycopy.

Implements intrinsic for  java.lang.System.arraycopy(char[], int, char[], int, int) -
this method is internal to android class libraries and used in such classes as StringBuffer and
StringBuilder. It is not possible to call it from application code. The intrinsic for
this method is implemented as inline method (assembly code is generated manually).

The intrinsic is x86 32 bit only.

Change-Id: Id1b1e0a20d5f6d5f5ebfe1fdc2447b6d8a515432
Signed-off-by: Daniil Sokolov <daniil.y.sokolov@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/compiler/dex/quick/dex_file_method_inliner.cc b/compiler/dex/quick/dex_file_method_inliner.cc
index b699bd3bf2..e240d73062 100644
--- a/compiler/dex/quick/dex_file_method_inliner.cc
+++ b/compiler/dex/quick/dex_file_method_inliner.cc
@@ -84,6 +84,8 @@ const char* const DexFileMethodInliner::kClassCacheNames[] = {
     "Ljava/lang/Thread;",      // kClassCacheJavaLangThread
     "Llibcore/io/Memory;",     // kClassCacheLibcoreIoMemory
     "Lsun/misc/Unsafe;",       // kClassCacheSunMiscUnsafe
+    "Ljava/lang/System;",      // kClassCacheJavaLangSystem
+    "[C"                       // kClassCacheJavaLangCharArray
 };
 
 const char* const DexFileMethodInliner::kNameCacheNames[] = {
@@ -129,6 +131,7 @@ const char* const DexFileMethodInliner::kNameCacheNames[] = {
     "putObject",             // kNameCachePutObject
     "putObjectVolatile",     // kNameCachePutObjectVolatile
     "putOrderedObject",      // kNameCachePutOrderedObject
+    "arraycopy",             // kNameCacheArrayCopy
 };
 
 const DexFileMethodInliner::ProtoDef DexFileMethodInliner::kProtoCacheDefs[] = {
@@ -204,6 +207,9 @@ const DexFileMethodInliner::ProtoDef DexFileMethodInliner::kProtoCacheDefs[] = {
     // kProtoCacheObjectJObject_V
     { kClassCacheVoid, 3, { kClassCacheJavaLangObject, kClassCacheLong,
         kClassCacheJavaLangObject } },
+    // kProtoCacheCharArrayICharArrayII_V
+    { kClassCacheVoid, 5, {kClassCacheJavaLangCharArray, kClassCacheInt,
+                kClassCacheJavaLangCharArray, kClassCacheInt, kClassCacheInt}}
 };
 
 const DexFileMethodInliner::IntrinsicDef DexFileMethodInliner::kIntrinsicMethods[] = {
@@ -291,6 +297,10 @@ const DexFileMethodInliner::IntrinsicDef DexFileMethodInliner::kIntrinsicMethods
     UNSAFE_GET_PUT(Object, Object, kIntrinsicFlagIsObject),
 #undef UNSAFE_GET_PUT
 
+    INTRINSIC(JavaLangSystem, ArrayCopy, CharArrayICharArrayII_V , kIntrinsicSystemArrayCopyCharArray,
+              0),
+
+
 #undef INTRINSIC
 };
 
@@ -387,6 +397,8 @@ bool DexFileMethodInliner::GenIntrinsic(Mir2Lir* backend, CallInfo* info) {
                                           intrinsic.d.data & kIntrinsicFlagIsObject,
                                           intrinsic.d.data & kIntrinsicFlagIsVolatile,
                                           intrinsic.d.data & kIntrinsicFlagIsOrdered);
+    case kIntrinsicSystemArrayCopyCharArray:
+      return backend->GenInlinedArrayCopyCharArray(info);
     default:
       LOG(FATAL) << "Unexpected intrinsic opcode: " << intrinsic.opcode;
       return false;  // avoid warning "control reaches end of non-void function"