Use implicit null checks inside try blocks.

Make implicit null check entrypoint save all registers, use
platform-specific approach to still pass the fault address.
Allow implicit null checks in try blocks.

On Nexus 9, AOSP ToT, the boot.oat size reduction is
  prebuilt multi-part boot image:
    - 32-bit boot.oat: -452KiB (-0.7%)
    - 64-bit boot.oat: -482KiB (-0.7%)
  on-device built single boot image:
    - 32-bit boot.oat: -444KiB (-0.7%)
    - 64-bit boot.oat: -488KiB (-0.7%)

Test: Run ART test suite on host and Nexus 9.
Test: Build aosp_mips64-eng.
Change-Id: I279f3ab57e2e2f338131c5cac45c51b673bdca19

1 files changed, 1 insertions, 8 deletions

diff --git a/compiler/optimizing/code_generator_mips.cc b/compiler/optimizing/code_generator_mips.cc
index 92e9cd9067..9abe485817 100644
--- a/compiler/optimizing/code_generator_mips.cc
+++ b/compiler/optimizing/code_generator_mips.cc
@@ -4856,14 +4856,7 @@ void InstructionCodeGeneratorMIPS::VisitBooleanNot(HBooleanNot* instruction) {
 }
 
 void LocationsBuilderMIPS::VisitNullCheck(HNullCheck* instruction) {
-  LocationSummary::CallKind call_kind = instruction->CanThrowIntoCatchBlock()
-      ? LocationSummary::kCallOnSlowPath
-      : LocationSummary::kNoCall;
-  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction, call_kind);
-  locations->SetInAt(0, Location::RequiresRegister());
-  if (instruction->HasUses()) {
-    locations->SetOut(Location::SameAsFirstInput());
-  }
+  codegen_->CreateNullCheckLocations(instruction);
 }
 
 void CodeGeneratorMIPS::GenerateImplicitNullCheck(HNullCheck* instruction) {