[clang] Avoid printing overly large integer. (PR #75902)

[Craig Topper via cfe-commits]

================
@@ -17132,6 +17132,10 @@ static bool ConvertAPValueToString(const APValue &V, 
QualType T,
         case BuiltinType::WChar_U: {
           unsigned TyWidth = Context.getIntWidth(T);
           assert(8 <= TyWidth && TyWidth <= 32 && "Unexpected integer width");
+          if (V.getInt() > std::numeric_limits<uint64_t>::max() ||
----------------
topperc wrote:

Also if `V.getInt()` was ever larger than 
`std::numeric_limits<uint64_t>::max())`, the getZExtValue() call below would 
trigger an assertion.

https://github.com/llvm/llvm-project/pull/75902
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