[clang] [clang] Be const-correct with all uses of `Module *`. (PR #93493)

[David Stone via cfe-commits]

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@@ -817,11 +817,11 @@ class alignas(8) Decl {
            "owned local decl but no local module storage");
     return reinterpret_cast<Module *const *>(this)[-1];
   }
-  void setLocalOwningModule(Module *M) {
+  void setLocalOwningModule(const Module *M) {
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davidstone wrote:

Hmm yes I should have been more careful around that `reinterpret_cast`.

https://github.com/llvm/llvm-project/pull/93493