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, 11 insertions, 0 deletions

diff --git a/compiler/common_compiler_test.cc b/compiler/common_compiler_test.cc
index 18f00e21e4..6b4dbed03b 100644
--- a/compiler/common_compiler_test.cc
+++ b/compiler/common_compiler_test.cc
@@ -44,6 +44,17 @@
 
 namespace art {
 
+std::unique_ptr<CompilerOptions> CommonCompilerTest::CreateCompilerOptions(
+    InstructionSet instruction_set, const std::string& variant) {
+  std::unique_ptr<CompilerOptions> compiler_options = std::make_unique<CompilerOptions>();
+  compiler_options->instruction_set_ = instruction_set;
+  std::string error_msg;
+  compiler_options->instruction_set_features_ =
+      InstructionSetFeatures::FromVariant(instruction_set, variant, &error_msg);
+  CHECK(compiler_options->instruction_set_features_ != nullptr) << error_msg;
+  return compiler_options;
+}
+
 CommonCompilerTest::CommonCompilerTest() {}
 CommonCompilerTest::~CommonCompilerTest() {}