ART: Use core image to speed up some gtests.

Host timing of
  art_compiler_tests --no_isolate --gtest_filter='<pattern>'
for different patterns:
  "ms total"                    before after
  LoadStoreEliminationTest*      16945  4750
  LoadStoreAnalysisTest*          2647   689
  ReferenceTypePropagationTest*  13542  3929
  InstructionSimplifierTest*      1452   406

Host timing of
  art_runtime_tests --no_isolate --gtest_filter='<pattern>'
for different patterns:
  "ms total"                    before after
  RegType*Test*                   2976  1675
  DexCacheTest*                    265    74
  JavaVmExtTest*                   785   230

Host timing of
  art_libartbase_tests --no_isolate --gtest_filter='<pattern>'
for different patterns:
  "ms total"                    before after
  FlagsTests*                      691   214

Host timing of
  art_dex2oat_tests --no_isolate --gtest_filter='<pattern>'
for different patterns:
  "ms total"                    before after
  VerifierDepsTest*               3567   874

Test: m test-art-host-gtest
Change-Id: I20df90e3d38aaa286e22ba070c7845bcb09e3bca

4 files changed, 14 insertions, 2 deletions

diff --git a/compiler/optimizing/instruction_simplifier_test.cc b/compiler/optimizing/instruction_simplifier_test.cc
index 2063eedb28..c7c5b12e25 100644
--- a/compiler/optimizing/instruction_simplifier_test.cc
+++ b/compiler/optimizing/instruction_simplifier_test.cc
@@ -36,6 +36,10 @@ class Throwable;
 template<typename SuperClass>
 class InstructionSimplifierTestBase : public SuperClass, public OptimizingUnitTestHelper {
  public:
+  InstructionSimplifierTestBase() {
+    this->use_boot_image_ = true;  // Make the Runtime creation cheaper.
+  }
+
   void SetUp() override {
     SuperClass::SetUp();
     gLogVerbosity.compiler = true;
diff --git a/compiler/optimizing/load_store_analysis_test.cc b/compiler/optimizing/load_store_analysis_test.cc
index c6d22087f7..3c26c8d6ce 100644
--- a/compiler/optimizing/load_store_analysis_test.cc
+++ b/compiler/optimizing/load_store_analysis_test.cc
@@ -40,7 +40,9 @@ namespace art {
 
 class LoadStoreAnalysisTest : public CommonCompilerTest, public OptimizingUnitTestHelper {
  public:
-  LoadStoreAnalysisTest() {}
+  LoadStoreAnalysisTest() {
+    use_boot_image_ = true;  // Make the Runtime creation cheaper.
+  }
 
   AdjacencyListGraph SetupFromAdjacencyList(
       const std::string_view entry_name,
diff --git a/compiler/optimizing/load_store_elimination_test.cc b/compiler/optimizing/load_store_elimination_test.cc
index 812a32aeec..7d68c9fe11 100644
--- a/compiler/optimizing/load_store_elimination_test.cc
+++ b/compiler/optimizing/load_store_elimination_test.cc
@@ -48,6 +48,10 @@ namespace art {
 template <typename SuperTest>
 class LoadStoreEliminationTestBase : public SuperTest, public OptimizingUnitTestHelper {
  public:
+  LoadStoreEliminationTestBase() {
+    this->use_boot_image_ = true;  // Make the Runtime creation cheaper.
+  }
+
   void SetUp() override {
     SuperTest::SetUp();
     gLogVerbosity.compiler = true;
diff --git a/compiler/optimizing/reference_type_propagation_test.cc b/compiler/optimizing/reference_type_propagation_test.cc
index d90567ae7e..d1bcab083c 100644
--- a/compiler/optimizing/reference_type_propagation_test.cc
+++ b/compiler/optimizing/reference_type_propagation_test.cc
@@ -39,7 +39,9 @@ constexpr bool kUseTrueRandomness = false;
 template<typename SuperTest>
 class ReferenceTypePropagationTestBase : public SuperTest, public OptimizingUnitTestHelper {
  public:
-  ReferenceTypePropagationTestBase() : graph_(nullptr), propagation_(nullptr) { }
+  ReferenceTypePropagationTestBase() : graph_(nullptr), propagation_(nullptr) {
+    this->use_boot_image_ = true;  // Make the Runtime creation cheaper.
+  }
 
   ~ReferenceTypePropagationTestBase() { }