[clang] Revert "[Clang] Improve infrastructure for libstdc++ workarounds" (PR #142432)

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git-clang-format --diff HEAD~1 HEAD --extensions cpp,h -- clang/include/clang/Lex/Preprocessor.h clang/lib/Lex/PPExpressions.cpp clang/lib/Sema/SemaDeclCXX.cpp clang/lib/Sema/SemaExceptionSpec.cpp clang/lib/Sema/SemaInit.cpp clang/lib/Sema/SemaTemplate.cpp clang/lib/Sema/SemaTemplateInstantiateDecl.cpp clang/test/SemaCXX/libstdcxx_common_type_hack.cpp clang/test/SemaCXX/libstdcxx_explicit_init_list_hack.cpp clang/test/SemaCXX/libstdcxx_pair_swap_hack.cpp
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diff --git a/clang/lib/Sema/SemaInit.cpp b/clang/lib/Sema/SemaInit.cpp
index 776cb022e..e06703f02 100644
--- a/clang/lib/Sema/SemaInit.cpp
+++ b/clang/lib/Sema/SemaInit.cpp
@@ -641,7 +641,8 @@ ExprResult InitListChecker::PerformEmptyInit(SourceLocation Loc,
   // in that case. stlport does so too.
   // Look for std::__debug for libstdc++, and for std:: for stlport.
   // This is effectively a compiler-side implementation of LWG2193.
-  if (!InitSeq && EmptyInitList && InitSeq.getFailureKind() ==
+  if (!InitSeq && EmptyInitList &&
+      InitSeq.getFailureKind() ==
           InitializationSequence::FK_ExplicitConstructor) {
     OverloadCandidateSet::iterator Best;
     OverloadingResult O =
diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 0de569ebc..91d4b1e15 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -1458,7 +1458,7 @@ Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D,
       SemaRef.getSourceManager().isInSystemHeader(D->getBeginLoc()))
     // Fold it to the (non-reference) type which g++ would have produced.
     DI = SemaRef.Context.getTrivialTypeSourceInfo(
-      DI->getType().getNonReferenceType());
+        DI->getType().getNonReferenceType());
 
   // Create the new typedef
   TypedefNameDecl *Typedef;

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https://github.com/llvm/llvm-project/pull/142432