8000 gh-130090: Support PGO for clang-cl by chris-eibl · Pull Request #129907 · python/cpython · GitHub
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gh-130090: Support PGO for clang-cl #129907

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Merged
merged 24 commits into from
Mar 4, 2025
Merged

gh-130090: Support PGO for clang-cl #129907

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859c89f
minimal changes needed for PGO with clang-cl
chris-eibl Feb 9, 2025
a529c39
like for MSVC, don't use link time optimization
chris-eibl Feb 9, 2025
26fb51f
Do not build _freeze_module twice in case of PGO
chris-eibl Feb 9, 2025
6e2cb69
remove /arch:AVX for blake2module.c again
chris-eibl Feb 10, 2025
7b46aeb
Revert "Do not build _freeze_module twice in case of PGO"
chris-eibl Feb 10, 2025
ced66bd
always clean the profile directory when doing a new clang PGO build
chris-eibl Feb 10, 2025
1aae65d
Merge remote-tracking branch 'origin/main' into clang-pgo
chris-eibl Feb 11, 2025
52fd5ab
Merge branch 'main' into clang-pgo
chris-eibl Feb 13, 2025
c2ecb57
blurb it
chris-eibl Feb 13, 2025
ad72df5
Adding myself to ACKS
chris-eibl Feb 13, 2025
74ec74e
extract pyproject-clangcl.props
chris-eibl Feb 13, 2025
79ce418
Merge branch 'python:main' into clang-pgo
chris-eibl Feb 16, 2025
8c8aa79
move MergeClangProfileData to pyproject-clangcl.props
chris-eibl Feb 16, 2025
2a9da27
rename RequirePGCFiles to RequireProfileData
chris-eibl Feb 16, 2025
ea4de96
Apply suggestions from code review
chris-eibl Feb 18, 2025
3346b9d
Use -Wno-profile-instr-unprofiled in the PGUpdate case
chris-eibl Feb 18, 2025
9db1a29
introduce CLANG_PROFILE_PATH
chris-eibl Feb 19, 2025
4ad2365
update readme.txt
chris-eibl Feb 21, 2025
1977953
Apply suggestions from code review
chris-eibl Feb 24, 2025
ad2dfce
Apply suggestions from code review
chris-eibl Feb 24, 2025
6edbe07
credit zooba
chris-eibl Feb 24, 2025
81b4c1d
address review comments regarding PGO
chris-eibl Feb 24, 2025
263870d
Explicitely set the architecture based on $(Platform)
chris-eibl Feb 24, 2025
db208ae
Update PCbuild/readme.txt
chris-eibl Feb 24, 2025
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1 change: 1 addition & 0 deletions PCbuild/_freeze_module.vcxproj
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,7 @@
<AdditionalIncludeDirectories>$(IntDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<Optimization>Disabled</Optimization>
<WholeProgramOptimization>false</WholeProgramOptimization>
<AdditionalOptions Condition="$(PlatformToolset) == 'ClangCL'">%(AdditionalOptions) -fno-lto</AdditionalOptions>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
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3 changes: 2 additions & 1 deletion PCbuild/pcbuild.proj
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Expand Up @@ -95,7 +95,8 @@
</ItemGroup>

<Target Name="Build">
<MSBuild Projects="@(FreezeProjects)"
<MSBuild Condition="$(Configuration) != 'PGUpdate'"
Projects="@(FreezeProjects)"
Properties="Configuration=%(Configuration);Platform=%(Platform);%(Properties)"
BuildInParallel="%(BuildInParallel)"
StopOnFirstFailure="true"
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6 changes: 5 additions & 1 deletion PCbuild/pyproject.props
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Expand Up @@ -10,6 +10,8 @@
<Py_IntDir Condition="'$(Py_IntDir)' == ''">$(MSBuildThisFileDirectory)obj\</Py_IntDir>
<IntDir>$(Py_IntDir)\$(MajorVersionNumber)$(MinorVersionNumber)$(ArchName)_$(Configuration)\$(ProjectName)\</IntDir>
<IntDir>$(IntDir.Replace(`\\`, `\`))</IntDir>
<ClangProfileDir>$(Py_IntDir)\$(MajorVersionNumber)$(MinorVersionNumber)$(ArchName)_PGInstrument\__clang_profiles\</ClangProfileDir>
<ClangProfileDir>$(ClangProfileDir.Replace(`\\`, `\`))</ClangProfileDir>
<!-- pyconfig.h is updated by pythoncore.vcxproj, so it's always in pythoncore's IntDir -->
<GeneratedPyConfigDir>$(Py_IntDir)\$(MajorVersionNumber)$(MinorVersionNumber)$(ArchName)_$(Configuration)\pythoncore\</GeneratedPyConfigDir>
<GeneratedFrozenModulesDir>$(Py_IntDir)\$(MajorVersionNumber)$(MinorVersionNumber)_frozen\</GeneratedFrozenModulesDir>
Expand Down Expand Up @@ -70,6 +72,8 @@
<AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
<AdditionalOptions Condition="$(PlatformToolset) == 'ClangCL'">-Wno-deprecated-non-prototype -Wno-unused-label -Wno-pointer-sign -Wno-incompatible-pointer-types-discards-qualifiers -Wno-unused-function %(AdditionalOptions)</AdditionalOptions>
<AdditionalOptions Condition="$(Configuration) != 'Debug' and $(PlatformToolset) == 'ClangCL'">-flto %(AdditionalOptions)</AdditionalOptions>
<AdditionalOptions Condition="$(SupportPGO) and $(Configuration) == 'PGInstrument' and $(PlatformToolset) == 'ClangCL'">-fprofile-instr-generate=$(ClangProfileDir)\default_%m.profraw %(AdditionalOptions)</AdditionalOptions>
<AdditionalOptions Condition="$(SupportPGO) and $(Configuration) == 'PGUpdate' and $(PlatformToolset) == 'ClangCL'">-fprofile-instr-use=$(ClangProfileDir)\profdata.profdata %(AdditionalOptions)</AdditionalOptions>
<AdditionalOptions Condition="$(MSVCHasBrokenARM64Clamping) == 'true' and $(Platform) == 'ARM64'">-d2pattern-opt-disable:-932189325 %(AdditionalOptions)</AdditionalOptions>
<AdditionalOptions Condition="$(MSVCHasBrokenARM64SignExtension) == 'true' and $(Platform) == 'ARM64'">-d2ssa-patterns-all- %(AdditionalOptions)</AdditionalOptions>
<AdditionalOptions Condition="$(GenerateSourceDependencies) == 'true'">/sourceDependencies "$(IntDir.Trim(`\`))" %(AdditionalOptions)</AdditionalOptions>
Expand Down Expand Up @@ -185,7 +189,7 @@ public override bool Execute() {
Targets="CleanAll" />
</Target>

<Target Name="CopyPGCFiles" BeforeTargets="PrepareForBuild" Condition="$(Configuration) == 'PGUpdate'">
<Target Name="CopyPGCFiles" BeforeTargets="PrepareForBuild" Condition="$(Configuration) == 'PGUpdate' and $(PlatformToolset) != 'ClangCL'">
<ItemGroup>
<_PGCFiles Include="$(OutDir)instrumented\$(TargetName)!*.pgc" />
<_PGDFile Include="$(OutDir)instrumented\$(TargetName).pgd" />
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13 changes: 13 additions & 0 deletions PCbuild/pythoncore.vcxproj
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Expand Up @@ -420,6 +420,7 @@
<ClCompile Include="..\Modules\blake2module.c">
<PreprocessorDefinitions Condition="'$(Platform)' == 'x64'">HACL_CAN_COMPILE_SIMD128;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions Condition="'$(Platform)' == 'x64'">HACL_CAN_COMPILE_SIMD256;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalOptions>/arch:AVX</AdditionalOptions>
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This should be removed right? It's not always true.

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My clang-cl builds error without that and it does not hurt MSVC AFACT.
It is also used for Hacl_Hash_Blake2b_Simd256.c and Hacl_Hash_Blake2s_Simd128.c, but there with Condition="'$(Platform)' == 'x64'.

I think, I should add that condition here, too.

If in doubt about MSVC, I could also furthermore add Condition="$(PlatformToolset) == 'ClangCL'.

</ClCompile>
<ClCompile Include="..\Modules\_codecsmodule.c" />
<ClCompile Include="..\Modules\_collectionsmodule.c" />
Expand Down Expand Up @@ -716,6 +717,18 @@
<Delete Files="$(IntDir)pyconfig.h;$(OutDir)pyconfig.h" />
</Target>

<Target Name="EnsureClangProfileDir" BeforeTargets="PrepareForBuild"
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I think, we should not only ensure the profile dir, but empty it.

But most probably only when a full rebuild / clean is done.

Condition="$(PlatformToolset) == 'ClangCL' and $(Configuration) == 'PGInstrument'">
<MakeDir Directories="$(ClangProfileDir)" Condition="!Exists($(ClangProfileDir))" />
</Target>

< 6D4E /td> <Target Name="MergeClangProfileData" BeforeTargets="PrepareForBuild"
Condition="$(PlatformToolset) == 'ClangCL' and $(Configuration) == 'PGUpdate'">
<Message Importance="high" Text="Merging clang profile data in $(ClangProfileDir)" />
<Exec
Command='"$(LLVMInstallDir)\bin\llvm-profdata.exe" merge -output=$(ClangProfileDir)\profdata.profdata $(ClangProfileDir)\default_*.profraw' />
</Target>

<Target Name="_GetBuildInfo" BeforeTargets="PrepareForBuild">
<PropertyGroup>
<GIT Condition="$(GIT) == ''">git</GIT>
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