Support Visual C++ PGO in Ninja generator

test/win/gyptest-link-pgo.py

Index: test/win/gyptest-link-pgo.py
===================================================================
--- test/win/gyptest-link-pgo.py	(revision 0)
+++ test/win/gyptest-link-pgo.py	(revision 0)
@@ -0,0 +1,75 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2013 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Make sure PGO is working properly.
+"""
+
+import TestGyp
+
+import os
+import sys
+
+if sys.platform == 'win32':
+  test = TestGyp.TestGyp(formats=['msvs', 'ninja'])
+
+  CHDIR = 'linker-flags'
+  test.run_gyp('pgo.gyp', chdir=CHDIR)
+
+  def IsPGOAvailable():
+    """Returns true if the Visual Studio available here supports PGO."""
+    test.build('pgo.gyp', 'gen_linker_option', chdir=CHDIR)
+    tmpfile = test.read(test.built_file_path('linker_options.txt', chdir=CHDIR))
+    return any(line.find('PGOPTIMIZE') for line in tmpfile)
+
+  # Test generated build files look fine.
+  if test.format == 'ninja':
+    ninja = test.built_file_path('obj/test_pgo_instrument.ninja', chdir=CHDIR)
+    test.must_contain(ninja, '/LTCG:PGINSTRUMENT')
+    test.must_contain(ninja, 'test_pgo.pgd')
+    ninja = test.built_file_path('obj/test_pgo_optimize.ninja', chdir=CHDIR)
+    test.must_contain(ninja, '/LTCG:PGOPTIMIZE')
+    test.must_contain(ninja, 'test_pgo.pgd')
+    ninja = test.built_file_path('obj/test_pgo_update.ninja', chdir=CHDIR)
+    test.must_contain(ninja, '/LTCG:PGUPDATE')
+    test.must_contain(ninja, 'test_pgo.pgd')
+  elif test.format == 'msvs':
+    LTCG_FORMAT = '<LinkTimeCodeGeneration>%s</LinkTimeCodeGeneration>'
+    vcproj = test.workpath('linker-flags/test_pgo_instrument.vcxproj')
+    test.must_contain(vcproj, LTCG_FORMAT % 'PGInstrument')
+    test.must_contain(vcproj, 'test_pgo.pgd')
+    vcproj = test.workpath('linker-flags/test_pgo_optimize.vcxproj')
+    test.must_contain(vcproj, LTCG_FORMAT % 'PGOptimization')
+    test.must_contain(vcproj, 'test_pgo.pgd')
+    vcproj = test.workpath('linker-flags/test_pgo_update.vcxproj')
+    test.must_contain(vcproj, LTCG_FORMAT % 'PGUpdate')
+    test.must_contain(vcproj, 'test_pgo.pgd')
+
+  # When PGO is available, try building binaries with PGO.
+  if IsPGOAvailable():
+    pgd_path = test.built_file_path('test_pgo.pgd', chdir=CHDIR)
+
+    # Test if 'PGInstrument' generates PGD (Profile-Guided Database) file.
+    if os.path.exists(pgd_path):
+      test.unlink(pgd_path)
+    test.must_not_exist(pgd_path)
+    test.build('pgo.gyp', 'test_pgo_instrument', chdir=CHDIR)
+    test.must_exist(pgd_path)
+
+    # Test if 'PGOptimize' works well
+    test.build('pgo.gyp', 'test_pgo_optimize', chdir=CHDIR)
+    test.must_contain_any_line(test.stdout(), ['profiled functions'])
+
+    # Test if 'PGUpdate' works well
+    test.build('pgo.gyp', 'test_pgo_update', chdir=CHDIR)
+    # With 'PGUpdate', linker should not complain that sources are changed after
+    # the previous training run.
+    test.touch(test.workpath('linker-flags/inline_test_main.cc'))
+    test.unlink(test.built_file_path('test_pgo_update.exe', chdir=CHDIR))
+    test.build('pgo.gyp', 'test_pgo_update', chdir=CHDIR)
+    test.must_contain_any_line(test.stdout(), ['profiled functions'])
+
+  test.pass_test()