diff options
Diffstat (limited to 'chromium/build/config/compiler/pgo/BUILD.gn')
| -rw-r--r-- | chromium/build/config/compiler/pgo/BUILD.gn | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/chromium/build/config/compiler/pgo/BUILD.gn b/chromium/build/config/compiler/pgo/BUILD.gn index 84c941faaf6..20f01f3cafa 100644 --- a/chromium/build/config/compiler/pgo/BUILD.gn +++ b/chromium/build/config/compiler/pgo/BUILD.gn @@ -14,16 +14,12 @@ config("pgo_instrumentation_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) { - # TODO(sebmarchand): Add a GN flag that allows setting the PGO profile - # name or find a way to remove use {target_name} in the filename? - # This uses the "%m" specifier to allow concurrent runs of the - # instrumented image. - cflags = [ "-fprofile-instr-generate=%m.profraw" ] + 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-instr-generate" ] + ldflags = [ "-fprofile-generate" ] } } } @@ -37,14 +33,22 @@ config("pgo_optimization_flags") { 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 == "x64") { _pgo_target = "win64" + inputs = [ "//chrome/build/win64.pgo.txt" ] } else { _pgo_target = "win32" + inputs = [ "//chrome/build/win32.pgo.txt" ] } } else if (is_mac) { _pgo_target = "mac" + inputs = [ "//chrome/build/mac.pgo.txt" ] } if (pgo_data_path == "" && _pgo_target != "") { @@ -66,7 +70,14 @@ config("pgo_optimization_flags") { # and at least some profile data always ends up being considered # out of date, so make sure we don't error for those cases. "-Wno-profile-instr-unprofiled", - "-Wno-error=profile-instr-out-of-date", + "-Wno-profile-instr-out-of-date", + + # Some hashing conflict results in a lot of warning like this when doing + # a PGO build: + # warning: foo.cc: Function control flow change detected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", ] } } |