commit 736b560f2d2c89b63dc895888c671b5519afa4c8
author Mathieu Chartier <mathieuc@google.com> Wed Sep 02 14:54:11 2015 -0700
committer Mathieu Chartier <mathieuc@google.com> Thu Sep 03 13:27:19 2015 -0700
tree d5aee7ac36f458a5f6e6d75fceb19f8963a71db5
parent fe3879e6011f629d0dd6b04fab00b9496bd4ea08

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

compiler/dex/dex_to_dex_compiler.cc

diff --git a/compiler/dex/dex_to_dex_compiler.cc b/compiler/dex/dex_to_dex_compiler.cc
index 603130a..850cca0 100644
--- a/compiler/dex/dex_to_dex_compiler.cc
+++ b/compiler/dex/dex_to_dex_compiler.cc
@@ -324,9 +324,13 @@
     DexToDexCompilationLevel dex_to_dex_compilation_level) {
   DCHECK(driver != nullptr);
   if (dex_to_dex_compilation_level != DexToDexCompilationLevel::kDontDexToDexCompile) {
-    art::DexCompilationUnit unit(nullptr, class_loader, art::Runtime::Current()->GetClassLinker(),
+    ScopedObjectAccess soa(Thread::Current());
+    StackHandleScope<1> hs(soa.Self());
+    ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
+    art::DexCompilationUnit unit(nullptr, class_loader, class_linker,
                                  dex_file, code_item, class_def_idx, method_idx, access_flags,
-                                 driver->GetVerifiedMethod(&dex_file, method_idx));
+                                 driver->GetVerifiedMethod(&dex_file, method_idx),
+                                 hs.NewHandle(class_linker->FindDexCache(soa.Self(), dex_file)));
     art::optimizer::DexCompiler dex_compiler(*driver, unit, dex_to_dex_compilation_level);
     dex_compiler.Compile();
     if (dex_compiler.GetQuickenedInfo().empty()) {