[clang] [clang-tools-extra] [llvm] Reland: [clang] Improved canonicalization for template specialization types (PR #135414)

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github-actions[bot] wrote:

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


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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions h,cpp -- clang-tools-extra/clangd/AST.cpp clang/include/clang/AST/ASTContext.h clang/include/clang/AST/TemplateBase.h clang/include/clang/AST/Type.h clang/lib/AST/ASTContext.cpp clang/lib/AST/ASTDiagnostic.cpp clang/lib/AST/ASTImporter.cpp clang/lib/AST/DeclTemplate.cpp clang/lib/AST/QualTypeNames.cpp clang/lib/AST/TemplateBase.cpp clang/lib/AST/Type.cpp clang/lib/Sema/SemaCXXScopeSpec.cpp clang/lib/Sema/SemaExpr.cpp clang/lib/Sema/SemaLookup.cpp clang/lib/Sema/SemaTemplate.cpp clang/lib/Sema/SemaTemplateDeduction.cpp clang/lib/Sema/SemaTemplateInstantiateDecl.cpp clang/lib/Sema/SemaTemplateVariadic.cpp clang/lib/Sema/TreeTransform.h clang/test/CXX/class.derived/class.derived.general/p2.cpp clang/test/CXX/temp/temp.decls/temp.class.spec/p6.cpp clang/test/SemaCXX/undefined-partial-specialization.cpp clang/test/SemaTemplate/make_integer_seq.cpp clang/test/SemaTemplate/type_pack_element.cpp clang/unittests/AST/TypePrinterTest.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
index 57c2a88b8..465a61e5e 100644
--- a/clang/lib/AST/ASTImporter.cpp
+++ b/clang/lib/AST/ASTImporter.cpp
@@ -1669,7 +1669,8 @@ ExpectedType ASTNodeImporter::VisitTemplateSpecializationType(
         TemplateArgument Canon = C.getCanonicalTemplateArgument(Arg);
         if (Arg.structurallyEquals(Canon))
           continue;
-        llvm::errs() << "non-canonical pos:" << (&Arg - Args.begin()) << ' ' << Str << '\n';
+        llvm::errs() << "non-canonical pos:" << (&Arg - Args.begin()) << ' '
+                     << Str << '\n';
         Arg.dump(llvm::errs(), C);
         llvm::errs() << "canonical:\n";
         Canon.dump(llvm::errs(), C);

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https://github.com/llvm/llvm-project/pull/135414