Make gyp tool to emit FDO Support for android.

pylib/gyp/generator/android.py

 # Copyright (c) 2012 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.
 
 # Notes:
 #
 # This generates makefiles suitable for inclusion into the Android build system
 # via an Android.mk file. It is based on make.py, the standard makefile
 # generator.
 #
@@ skipping 485 matching lines @@
 
       self.WriteLn('\n# Include paths placed before CFLAGS/CPPFLAGS')
       includes = list(config.get('include_dirs', []))
       includes.extend(extracted_includes)
       includes = map(Sourceify, map(self.LocalPathify, includes))
       includes = self.NormalizeIncludePaths(includes)
       self.WriteList(includes, 'LOCAL_C_INCLUDES_%s' % configname)
 
       self.WriteLn('\n# Flags passed to only C++ (and not C) files.')
       self.WriteList(config.get('cflags_cc'), 'LOCAL_CPPFLAGS_%s' % configname)
+      if int(config.get('android_enable_fdo', 0)):
+        use_fdo = 'true'
+      else:
+        use_fdo = 'false'
+      self.WriteLn('\nLOCAL_FDO_SUPPORT_%s := %s' % (configname, use_fdo))
 
     self.WriteLn('\nLOCAL_CFLAGS := $(MY_CFLAGS_$(GYP_CONFIGURATION)) '
                  '$(MY_DEFS_$(GYP_CONFIGURATION))')
+    self.WriteLn(
+        'LOCAL_FDO_SUPPORT := $(LOCAL_FDO_SUPPORT_$(GYP_CONFIGURATION))')
+
+    self.WriteLn('\nifneq ($(strip $(TARGET_FDO_CFLAGS)),)')
+    self.WriteLn('  ifeq ($(strip $(LOCAL_FDO_SUPPORT)), true)')
+    self.WriteLn(
+        '    LOCAL_CFLAGS := $(patsubst -Os,-O2,$(LOCAL_CFLAGS))')
+    self.WriteLn(
+        '    fdo_incompatible_flags=-fno-early-inlining -finline-limit=%')
+    self.WriteLn(
+        '    LOCAL_CFLAGS := $(filter-out $(fdo_incompatible_flags),'
+        '$(LOCAL_CFLAGS))')
+    self.WriteLn('  endif')
+    self.WriteLn('endif\n')
+
     # Undefine ANDROID for host modules
     # TODO: the source code should not use macro ANDROID to tell if it's host
     # or target module.
     if self.toolset == 'host':
       self.WriteLn('# Undefine ANDROID for host modules')
       self.WriteLn('LOCAL_CFLAGS += -UANDROID')
     self.WriteLn('LOCAL_C_INCLUDES := $(GYP_COPIED_SOURCE_ORIGIN_DIRS) '
                                      '$(LOCAL_C_INCLUDES_$(GYP_CONFIGURATION))')
     self.WriteLn('LOCAL_CPPFLAGS := $(LOCAL_CPPFLAGS_$(GYP_CONFIGURATION))')
     # Android uses separate flags for assembly file invocations, but gyp expects
@@ skipping 570 matching lines @@
   # Write out the sorted list of includes.
   root_makefile.write('\n')
   for include_file in sorted(include_list):
     root_makefile.write('include $(LOCAL_PATH)/' + include_file + '\n')
   root_makefile.write('\n')
 
   if write_alias_targets:
     root_makefile.write(ALL_MODULES_FOOTER)
 
   root_makefile.close()