Use direct class pointers at allocation sites in the compiled code.

- Rather than looking up a class from its type ID (and checking if
  it's resolved/initialized, resolving/initializing if not), use
  direct class pointers, if possible (boot-code-to-boot-class pointers
  and app-code-to-boot-class pointers.)
- This results in a 1-2% speedup in Ritz MemAllocTest on Nexus 4.
- Embedding the object size (along with class pointers) caused a 1-2%
  slowdown in MemAllocTest and isn't implemented in this change.
- TODO: do the same for array allocations.
- TODO: when/if an application gets its own image, implement
  app-code-to-app-class pointers.
- Fix a -XX:gc bug.
  cf. https://android-review.googlesource.com/79460/
- Add /tmp/android-data/dalvik-cache to the list of locations to
  remove oat files in clean-oat-host.
  cf. https://android-review.googlesource.com/79550
- Add back a dropped UNLIKELY in FindMethodFromCode().
  cf. https://android-review.googlesource.com/74205

Bug: 9986565
Change-Id: I590b96bd21f7a7472f88e36752e675547559a5b1

1 files changed, 11 insertions, 0 deletions

diff --git a/compiler/dex/quick/gen_invoke.cc b/compiler/dex/quick/gen_invoke.cc
index d942a24a18..f865207fc7 100644
--- a/compiler/dex/quick/gen_invoke.cc
+++ b/compiler/dex/quick/gen_invoke.cc
@@ -142,6 +142,17 @@ void Mir2Lir::CallRuntimeHelperImmMethod(ThreadOffset helper_offset, int arg0, b
   CallHelper(r_tgt, helper_offset, safepoint_pc);
 }
 
+void Mir2Lir::CallRuntimeHelperRegMethod(ThreadOffset helper_offset, int arg0, bool safepoint_pc) {
+  int r_tgt = CallHelperSetup(helper_offset);
+  DCHECK_NE(TargetReg(kArg1), arg0);
+  if (TargetReg(kArg0) != arg0) {
+    OpRegCopy(TargetReg(kArg0), arg0);
+  }
+  LoadCurrMethodDirect(TargetReg(kArg1));
+  ClobberCallerSave();
+  CallHelper(r_tgt, helper_offset, safepoint_pc);
+}
+
 void Mir2Lir::CallRuntimeHelperRegLocationRegLocation(ThreadOffset helper_offset, RegLocation arg0,
                                                       RegLocation arg1, bool safepoint_pc) {
   int r_tgt = CallHelperSetup(helper_offset);