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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| # Copyright 2024 The Chromium Authors, RobRich999, and Alex313031 | ||
| # Use of this source code is governed by a BSD-style license that can be | ||
| # found in the LICENSE file. | ||
|
|
||
| import("//build/config/chromeos/ui_mode.gni") | ||
| import("//build/config/clang/clang.gni") | ||
| import("//build/config/compiler/compiler.gni") | ||
| import("//build/config/compiler/pgo/pgo.gni") | ||
| import("//build/config/features.gni") | ||
| import("//build/toolchain/toolchain.gni") | ||
|
|
||
| # Configuration that enables PGO instrumentation. | ||
| config("pgo_instrumentation_flags") { | ||
| visibility = [ ":default_pgo_flags" ] | ||
|
|
||
| # Only add flags when chrome_pgo_phase == 1, so that variables we would use | ||
| # are not required to be defined when we're not actually using PGO. | ||
| if (chrome_pgo_phase == 1 && is_clang && !is_nacl && is_a_target_toolchain) { | ||
| cflags = [ "-fprofile-generate" ] | ||
| if (!is_win) { | ||
| # Windows directly calls link.exe instead of the compiler driver when | ||
| # linking, and embeds the path to the profile runtime library as | ||
| # dependent library into each object file. | ||
| ldflags = [ "-fprofile-generate" ] | ||
| } | ||
| } | ||
| } | ||
|
|
||
| # Configuration that enables optimization using profile data. | ||
| config("pgo_optimization_flags") { | ||
| visibility = [ ":default_pgo_flags" ] | ||
|
|
||
| # Only add flags when chrome_pgo_phase == 2, so that variables we would use | ||
| # are not required to be defined when we're not actually using PGO. | ||
| if (chrome_pgo_phase == 2 && is_clang && !is_nacl && is_a_target_toolchain) { | ||
| _pgo_target = "" | ||
|
|
||
| # There are txt files used by //tools/update_pgo_profiles.py to decide which | ||
| # profiles to use, adding them as inputs so that analyzer recognizes the | ||
| # dependencies. | ||
| inputs = [] | ||
|
|
||
| if (is_win) { | ||
| if (target_cpu == "arm64") { | ||
| _pgo_target = "win-arm64" | ||
| } else if (target_cpu == "x64") { | ||
| _pgo_target = "win64" | ||
| } else { | ||
| _pgo_target = "win32" | ||
| } | ||
| } else if (is_mac) { | ||
| if (target_cpu == "arm64") { | ||
| _pgo_target = "mac-arm" | ||
| } else { | ||
| _pgo_target = "mac" | ||
| } | ||
| } else if (is_linux) { | ||
| _pgo_target = "linux" | ||
| } else if (is_chromeos_lacros) { | ||
| if (target_cpu == "arm") { | ||
| # We don't have the arm device to train arm pgo data. So Lacros arm | ||
| # would use arm64 profile. | ||
| _pgo_target = "lacros-arm64" | ||
| } else if (target_cpu == "arm64") { | ||
| _pgo_target = "lacros-arm64" | ||
| } else { | ||
| _pgo_target = "lacros64" | ||
| } | ||
| } else if (is_android) { | ||
| # Use |current_cpu| and not |target_cpu|; for Android we may built both. | ||
| if (current_cpu == "arm64") { | ||
| _pgo_target = "android-arm64" | ||
| } else { | ||
| _pgo_target = "android-arm32" | ||
| } | ||
| } else if (is_fuchsia) { | ||
| if (target_cpu == "arm64") { | ||
| _pgo_target = "mac-arm" | ||
| } else { | ||
| _pgo_target = "mac" | ||
| } | ||
| } else if (is_ios && use_blink) { | ||
| if (target_cpu == "arm64") { | ||
| _pgo_target = "mac-arm" | ||
| } else { | ||
| _pgo_target = "mac" | ||
| } | ||
| } | ||
|
|
||
| if (_pgo_target == "win-arm64") { | ||
| inputs = [ "//chrome/build/win-arm64.pgo.txt" ] | ||
| } else if (_pgo_target == "win64") { | ||
| inputs = [ "//chrome/build/win64.pgo.txt" ] | ||
| } else if (_pgo_target == "win32") { | ||
| inputs = [ "//chrome/build/win32.pgo.txt" ] | ||
| } else if (_pgo_target == "mac-arm") { | ||
| inputs = [ "//chrome/build/mac-arm.pgo.txt" ] | ||
| } else if (_pgo_target == "mac") { | ||
| inputs = [ "//chrome/build/mac.pgo.txt" ] | ||
| } else if (_pgo_target == "linux") { | ||
| inputs = [ "//chrome/build/linux.pgo.txt" ] | ||
| } else if (_pgo_target == "lacros64") { | ||
| inputs = [ "//chrome/build/lacros64.pgo.txt" ] | ||
| } else if (_pgo_target == "lacros-arm") { | ||
| inputs = [ "//chrome/build/lacros-arm.pgo.txt" ] | ||
| } else if (_pgo_target == "lacros-arm64") { | ||
| inputs = [ "//chrome/build/lacros-arm64.pgo.txt" ] | ||
| } else if (_pgo_target == "android-arm32") { | ||
| inputs = [ "//chrome/build/android-arm32.pgo.txt" ] | ||
| } else if (_pgo_target == "android-arm64") { | ||
| inputs = [ "//chrome/build/android-arm64.pgo.txt" ] | ||
| } | ||
|
|
||
| if (_pgo_target != "" && pgo_data_path == "") { | ||
| pgo_data_path = exec_script("//tools/update_pgo_profiles.py", | ||
| [ | ||
| "--target", | ||
| _pgo_target, | ||
| "get_profile_path", | ||
| ], | ||
| "value") | ||
| } | ||
| assert(pgo_data_path != "", | ||
| "Please set pgo_data_path to point at the profile data") | ||
| cflags = [ | ||
| "-fprofile-use=" + rebase_path(pgo_data_path, root_build_dir), | ||
|
|
||
| # It's possible to have some profile data legitimately missing, | ||
| # and at least some profile data always ends up being considered | ||
| # out of date, so make sure we don't error for those cases. | ||
| "-Wno-profile-instr-unprofiled", | ||
| "-Wno-profile-instr-out-of-date", | ||
|
|
||
| # Some hashing conflict results in a lot of warning like this when doing | ||
| # a PGO build: | ||
| # warning: foo.cc: Function control flow change detected (hash mismatch) | ||
| # [-Wbackend-plugin] | ||
| # See https://crbug.com/978401 | ||
| "-Wno-backend-plugin", | ||
| ] | ||
|
|
||
| # Enable basic block layout based on the extended TSP problem. This aims to | ||
| # improve icache utilization and reduce the binary size. | ||
| if (use_thin_lto) { | ||
| if (is_win) { | ||
| ldflags = [ | ||
| "-mllvm:-enable-ext-tsp-block-placement" | ||
| "-mllvm:-enable-split-machine-functions" | ||
| ] | ||
| } else { | ||
| ldflags = [ | ||
| "-Wl,-mllvm,-enable-ext-tsp-block-placement", | ||
| "-Wl,-mllvm,-enable-split-machine-functions", | ||
| ] | ||
| } | ||
| } else { | ||
| if (is_win) { | ||
| cflags += [ | ||
| "-mllvm", "-enable-ext-tsp-block-placement", | ||
| "-fsplit-machine-functions", | ||
| ] | ||
| } else { | ||
| cflags += [ | ||
| "-mllvm", "-enable-ext-tsp-block-placement", | ||
| "-fsplit-machine-functions", | ||
| ] | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| # Applies flags necessary when profile-guided optimization is used. | ||
| # Flags are only added if PGO is enabled, so that this config is safe to | ||
| # include by default. | ||
| config("default_pgo_flags") { | ||
| if (chrome_pgo_phase == 0) { | ||
| # Nothing. This config should be a no-op when chrome_pgo_phase == 0. | ||
| } else if (chrome_pgo_phase == 1) { | ||
| configs = [ ":pgo_instrumentation_flags" ] | ||
| } else if (chrome_pgo_phase == 2) { | ||
| configs = [ ":pgo_optimization_flags" ] | ||
| } | ||
| } |