[clang] [Clang] Rework LTO mode selection to be a Toolchain property (PR #201155)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- clang/include/clang/Driver/Driver.h clang/include/clang/Driver/ToolChain.h clang/lib/Driver/Driver.cpp clang/lib/Driver/SanitizerArgs.cpp clang/lib/Driver/ToolChain.cpp clang/lib/Driver/ToolChains/AIX.cpp clang/lib/Driver/ToolChains/AMDGPU.cpp clang/lib/Driver/ToolChains/AMDGPUOpenMP.cpp clang/lib/Driver/ToolChains/AVR.cpp clang/lib/Driver/ToolChains/BareMetal.cpp clang/lib/Driver/ToolChains/Clang.cpp clang/lib/Driver/ToolChains/Cuda.cpp clang/lib/Driver/ToolChains/Darwin.cpp clang/lib/Driver/ToolChains/Flang.cpp clang/lib/Driver/ToolChains/FreeBSD.cpp clang/lib/Driver/ToolChains/Fuchsia.cpp clang/lib/Driver/ToolChains/Gnu.cpp clang/lib/Driver/ToolChains/HIPAMD.cpp clang/lib/Driver/ToolChains/Haiku.cpp clang/lib/Driver/ToolChains/Hexagon.cpp clang/lib/Driver/ToolChains/MSVC.cpp clang/lib/Driver/ToolChains/MinGW.cpp clang/lib/Driver/ToolChains/OpenBSD.cpp clang/lib/Driver/ToolChains/PS4CPU.cpp clang/lib/Driver/ToolChains/SPIRV.cpp clang/lib/Driver/ToolChains/Serenity.cpp clang/lib/Driver/ToolChains/WebAssembly.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 21f4abff9..3b3232aba 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -8228,10 +8228,9 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     // Otherwise, issue an error.
 
     auto OtherLTOMode = TC.getLTOMode(
-        Args, IsDeviceOffloadAction
-                  ? Action::OFK_None
-                  : static_cast<Action::OffloadKind>(
-                        C.getActiveOffloadKinds()));
+        Args, IsDeviceOffloadAction ? Action::OFK_None
+                                    : static_cast<Action::OffloadKind>(
+                                          C.getActiveOffloadKinds()));
     auto OtherIsUsingLTO = OtherLTOMode != LTOK_None;
 
     if ((!IsUsingLTO && !OtherIsUsingLTO) ||

``````````

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https://github.com/llvm/llvm-project/pull/201155