[clang] [ARM] Introduce -mtp=auto and make it the default (PR #128901)

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github-actions[bot] wrote:

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


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff a955426a16bcbb9bf05eb0e3894663dff4983b00 fb062da006042e7f0d6cab77f9d0d57a50d091f9 --extensions cpp,c -- clang/lib/Driver/ToolChains/Arch/ARM.cpp clang/test/Driver/arm-thread-pointer.c
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Driver/ToolChains/Arch/ARM.cpp b/clang/lib/Driver/ToolChains/Arch/ARM.cpp
index c07b6afc08..42f92eb946 100644
--- a/clang/lib/Driver/ToolChains/Arch/ARM.cpp
+++ b/clang/lib/Driver/ToolChains/Arch/ARM.cpp
@@ -576,7 +576,7 @@ llvm::ARM::FPUKind arm::getARMTargetFeatures(const Driver &D,
 
   arm::ReadTPMode TPMode = getReadTPMode(D, Args, Triple, ForAS);
 
-  if (TPMode  == ReadTPMode::TPIDRURW)
+  if (TPMode == ReadTPMode::TPIDRURW)
     Features.push_back("+read-tp-tpidrurw");
   else if (TPMode == ReadTPMode::TPIDRURO)
     Features.push_back("+read-tp-tpidruro");

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https://github.com/llvm/llvm-project/pull/128901