[clang] Handle indexes (PR #130528)

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


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``````````bash
git-clang-format --diff 85d60a441ab810e25605fb4555971b1d0a996e5c 340c458523af7ab6a3228f2173a4e95b3f7b9d67 --extensions cpp -- clang/lib/AST/DeclCXX.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/DeclCXX.cpp b/clang/lib/AST/DeclCXX.cpp
index ecba340f04..b0f0782555 100644
--- a/clang/lib/AST/DeclCXX.cpp
+++ b/clang/lib/AST/DeclCXX.cpp
@@ -2465,20 +2465,20 @@ CXXMethodDecl *CXXMethodDecl::getDevirtualizedMethod(const Expr *Base,
   if (Base->isPRValue() && Base->getType()->isRecordType())
     return this;
 
-  // Handle array subscripts with constant indices when the pointee type is known
+  // Handle array subscripts with constant indices when the pointee type is
+  // known
   if (const auto *ASE = dyn_cast<ArraySubscriptExpr>(Base)) {
     QualType BaseTy = ASE->getBase()->getType();
-    
+
     // Check if it's a pointer to a record type
-    if (BaseTy->isPointerType() && 
-        BaseTy->getPointeeType()->isRecordType()) {
+    if (BaseTy->isPointerType() && BaseTy->getPointeeType()->isRecordType()) {
       // For C++17 and later, we can devirtualize array access beyond p[0]
       // According to [expr.add]/6, if the array element type and the pointee
       // type are not similar, behavior is undefined, so we can assume they are
       // the same type
       const ASTContext &Context = getParent()->getASTContext();
       const LangOptions &LangOpts = Context.getLangOpts();
-      if (LangOpts.CPlusPlus17 && 
+      if (LangOpts.CPlusPlus17 &&
           ASE->getIdx()->isIntegerConstantExpr(Context)) {
         // It's a constant index, so it's safe to devirtualize
         return this;

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https://github.com/llvm/llvm-project/pull/130528