Add perf test for Error/Result class.

src/common/angleutils.h

@@ -236,6 +236,18 @@ std::string ToString(const T &value)
 #define ANGLE_INLINE inline
 #endif
 
+#if defined(__clang__) || (defined(__GNUC__) && defined(__has_attribute))
+#if __has_attribute(noinline)
+#define ANGLE_NOINLINE __attribute__((noinline))
+#else
+#define ANGLE_NOINLINE
+#endif
+#elif defined(_MSC_VER)
+#define ANGLE_NOINLINE __declspec(noinline)
+#else
+#define ANGLE_NOINLINE
+#endif
+
 #ifndef ANGLE_STRINGIFY
 #define ANGLE_STRINGIFY(x) #x
 #endif

src/tests/angle_perftests.gypi

@@ -29,6 +29,7 @@
             '<(angle_path)/src/tests/perf_tests/DrawElementsPerf.cpp',
             '<(angle_path)/src/tests/perf_tests/DynamicPromotionPerfTest.cpp',
             '<(angle_path)/src/tests/perf_tests/EGLInitializePerf.cpp',
+            '<(angle_path)/src/tests/perf_tests/ResultPerf.cpp',
             '<(angle_path)/src/tests/perf_tests/IndexConversionPerf.cpp',
             '<(angle_path)/src/tests/perf_tests/InstancingPerf.cpp',
             '<(angle_path)/src/tests/perf_tests/InterleavedAttributeData.cpp',

src/tests/perf_tests/ResultPerf.cpp

+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// ResultPerf:
+//   Performance test for ANGLE's Error result class.
+//
+
+#include "ANGLEPerfTest.h"
+#include "libANGLE/Error.h"
+
+volatile int gThing = 0;
+
+namespace
+{
+constexpr int kIterations = 1000;
+
+class ResultPerfTest : public ANGLEPerfTest
+{
+  public:
+    ResultPerfTest();
+    void step() override;
+};
+
+ResultPerfTest::ResultPerfTest() : ANGLEPerfTest("ResultPerf", "_run")
+{
+}
+
+ANGLE_NOINLINE gl::Error ExternalCall()
+{
+    if (gThing != 0)
+    {
+        printf("Something very slow");
+        return gl::Error(GL_INVALID_OPERATION);
+    }
+    else
+    {
+        return gl::NoError();
+    }
+}
+
+gl::Error CallReturningResult(int depth)
+{
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    ANGLE_TRY(ExternalCall());
+    return ExternalCall();
+}
+
+void ResultPerfTest::step()
+{
+    for (int i = 0; i < kIterations; i++)
+    {
+        (void)CallReturningResult(0);
+        (void)CallReturningResult(0);
+        (void)CallReturningResult(0);
+        (void)CallReturningResult(0);
+        (void)CallReturningResult(0);
+    }
+}
+
+TEST_F(ResultPerfTest, Run)
+{
+    run();
+}
+}  // anonymous namespace