[compiler-rt] [clang-tools-extra] [clang] [llvm] [InferAddressSpaces] Fix constant replace to avoid modifying other functions (PR #70611)

[Matt Arsenault via cfe-commits]

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@@ -334,6 +335,15 @@ template<> struct simplify_type<User::const_op_iterator> {
   }
 };
 
+template <> struct GraphTraits<User *> {
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arsenm wrote:

If we allowed bitcasts between address spaces with the same size, we could drop 
addrspacecast constantexprs altogether 

https://github.com/llvm/llvm-project/pull/70611
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