Index: clang/lib/Lex/LiteralSupport.cpp
===================================================================
--- clang/lib/Lex/LiteralSupport.cpp
+++ clang/lib/Lex/LiteralSupport.cpp
@@ -1597,7 +1597,7 @@
     IsMultiChar = false;
   }
 
-  llvm::APInt LitVal(PP.getTargetInfo().getIntWidth(), 0);
+  llvm::APInt LitVal(PP.getTargetInfo().getChar32Width(), 0);
 
   // Narrow character literals act as though their value is concatenated
   // in this implementation, but warn on overflow.