Improve HLoadClass code generation.

For classes in the boot image, use either direct pointers
or PC-relative addresses. For other classes, use PC-relative
access to the dex cache arrays for AOT and direct address of
the type's dex cache slot for JIT.

For aosp_flounder-userdebug:
  - 32-bit boot.oat: -252KiB (-0.3%)
  - 64-bit boot.oat: -412KiB (-0.4%)
  - 32-bit dalvik cache total: -392KiB (-0.4%)
  - 64-bit dalvik-cache total: -2312KiB (-1.0%)
    (contains more files than the 32-bit dalvik cache)
For aosp_flounder-userdebug forced to compile PIC:
  - 32-bit boot.oat: -124KiB (-0.2%)
  - 64-bit boot.oat: -420KiB (-0.5%)
  - 32-bit dalvik cache total: -136KiB (-0.1%)
  - 64-bit dalvik-cache total: -1136KiB (-0.5%)
    (contains more files than the 32-bit dalvik cache)

Bug: 27950288
Change-Id: I4da991a4b7e53c63c92558b97923d18092acf139

1 files changed, 1 insertions, 0 deletions

diff --git a/compiler/optimizing/sharpening.h b/compiler/optimizing/sharpening.h
index 24152f6b71..d35ae66e05 100644
--- a/compiler/optimizing/sharpening.h
+++ b/compiler/optimizing/sharpening.h
@@ -47,6 +47,7 @@ class HSharpening : public HOptimization {
 
  private:
   void ProcessInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke);
+  void ProcessLoadClass(HLoadClass* load_class);
   void ProcessLoadString(HLoadString* load_string);
 
   CodeGenerator* codegen_;