[clang] [llvm] [DebugInfo] Emit DW_AT_const_value for constexpr array static members (PR #182442)

[Alexander Yermolovich via cfe-commits]

================
@@ -2097,6 +2092,53 @@ CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy,
         C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt());
       if (Value->isFloat())
         C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat());
+      if (Value->isArray()) {
+        // Handle constexpr array constants for debug info
+        // We handle arrays of integer types (char, short, int, long),
+        // which covers the most common and useful cases.
+        if (const auto *ArrayTy =
+                CGM.getContext().getAsArrayType(Var->getType())) {
+          QualType ElemQTy = ArrayTy->getElementType();
+          if (ElemQTy->isIntegerType()) {
+            unsigned ElemBitWidth = CGM.getContext().getTypeSize(ElemQTy);
----------------
ayermolo wrote:

const for values that don't change.

https://github.com/llvm/llvm-project/pull/182442