[clang] [llvm] [clang][LLVM Demangler] Add an assertion that validates that all mang… (PR #111391)

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<!--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 4b3ba64ba71c06b6bc9db347a66a7316f5edbcc4 9c16570650e487e63ec887d61be478ecad5402c2 --extensions cpp,h -- clang/test/CodeGenCXX/assert-demangle.cpp clang/lib/CodeGen/CodeGenModule.cpp llvm/include/llvm/Demangle/Demangle.h llvm/lib/Demangle/Demangle.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 6afbfa9ae4..94b04df652 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -2047,10 +2047,11 @@ StringRef CodeGenModule::getMangledName(GlobalDecl GD) {
                  GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel),
                  ND));
 
-  if (getCodeGenOpts().NoDemanglingFailures) 
-    assert((!llvm::isMangledName(MangledName) || llvm::demangle(MangledName) !=
-           MangledName) && "clang must demangle a mangled name it generates!");
-  
+  if (getCodeGenOpts().NoDemanglingFailures)
+    assert((!llvm::isMangledName(MangledName) ||
+            llvm::demangle(MangledName) != MangledName) &&
+           "clang must demangle a mangled name it generates!");
+
   auto Result = Manglings.insert(std::make_pair(MangledName, GD));
   return MangledDeclNames[CanonicalGD] = Result.first->first();
 }

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https://github.com/llvm/llvm-project/pull/111391