Optimizing: Run gtests without creating the Runtime.

The only Optimizing test that actually needs a Runtime is
the ReferenceTypePropagationTest, so we make it subclass
CommonCompilerTest explicitly and change OptimizingUnitTest
to subclass CommonArtTest for the other tests.

On host, each test that initializes the Runtime takes ~220ms
more than without initializing the Runtime. For example, the
ConstantFoldingTest that has 10 individual tests previously
took over 2.2s to run but without the Runtime initialization
it takes around 3-5ms. On target, running 32-bit gtests on
taimen with run-gtests.sh (single-threaded) goes from
~28m47s to ~26m13s, a reduction of ~9%.

Test: m test-art-host-gtest
Test: run-gtests.sh
Change-Id: I43e50ed58e52cc0ad04cdb4d39801bfbae840a3d

1 files changed, 3 insertions, 2 deletions

diff --git a/compiler/optimizing/scheduler_test.cc b/compiler/optimizing/scheduler_test.cc
index 7835b1d3d3..b5ec93ea6c 100644
--- a/compiler/optimizing/scheduler_test.cc
+++ b/compiler/optimizing/scheduler_test.cc
@@ -188,9 +188,10 @@ class SchedulerTest : public OptimizingUnitTest {
       HInstructionScheduling scheduling(graph, target_config.GetInstructionSet());
       scheduling.Run(/*only_optimize_loop_blocks*/ false, /*schedule_randomly*/ true);
 
-      OverrideInstructionSetFeatures(target_config.GetInstructionSet(), "default");
+      std::unique_ptr<CompilerOptions> compiler_options =
+          CommonCompilerTest::CreateCompilerOptions(target_config.GetInstructionSet(), "default");
       RunCode(target_config,
-              *compiler_options_,
+              *compiler_options,
               graph,
               [](HGraph* graph_arg) { RemoveSuspendChecks(graph_arg); },
               has_result, expected);