Use mmapped boot image class table for PIC app HLoadClass.
Implement new HLoadClass load kind for boot image classes
referenced by PIC-compiled apps (i.e. prebuilts) that uses
PC-relative load from a boot image ClassTable mmapped into
the apps .bss. This reduces the size of the PIC prebuilts
that reference boot image classes compared to the kBssEntry
as we can completely avoid the slow path and stack map
unless we need to do the class initialization check.
Prebuilt services.odex for aosp_angler-userdebug (arm64):
- before: 20312800
- after: 19775352 (-525KiB)
Test: m test-art-host-gtest
Test: testrunner.py --host
Test: testrunner.py --host --pictest
Test: testrunner.py --target on Nexus 6P.
Test: testrunner.py --target --pictest on Nexus 6P.
Test: Nexus 6P boots.
Bug: 31951624
Change-Id: I13adb19a1fa7d095a72a41f09daa6101876e77a8
diff --git a/compiler/optimizing/pc_relative_fixups_mips.cc b/compiler/optimizing/pc_relative_fixups_mips.cc
index 4cb99f9..e569b78 100644
--- a/compiler/optimizing/pc_relative_fixups_mips.cc
+++ b/compiler/optimizing/pc_relative_fixups_mips.cc
@@ -75,6 +75,7 @@
switch (load_kind) {
case HLoadClass::LoadKind::kBootImageLinkTimePcRelative:
case HLoadClass::LoadKind::kBootImageAddress:
+ case HLoadClass::LoadKind::kBootImageClassTable:
case HLoadClass::LoadKind::kBssEntry:
// Add a base register for PC-relative literals on R2.
InitializePCRelativeBasePointer();