[clang] [Clang][CodeGen] Start migrating away from assuming the Default AS is 0 (PR #88182)

[Eli Friedman via cfe-commits]

================
@@ -3581,8 +3582,10 @@ ConstantAddress 
CodeGenModule::GetAddrOfTemplateParamObject(
       isExternallyVisible(TPO->getLinkageAndVisibility().getLinkage())
           ? llvm::GlobalValue::LinkOnceODRLinkage
           : llvm::GlobalValue::InternalLinkage;
-  auto *GV = new llvm::GlobalVariable(getModule(), Init->getType(),
-                                      /*isConstant=*/true, Linkage, Init, 
Name);
+  auto *GV = new llvm::GlobalVariable(
+      getModule(), Init->getType(),
+      /*isConstant=*/true, Linkage, Init, Name, nullptr,
+      llvm::GlobalValue::NotThreadLocal, GlobalsInt8PtrTy->getAddressSpace());
----------------
efriedma-quic wrote:

This doesn't do anything unless the datalayout is broken: globals already go 
into getDefaultGlobalsAddressSpace() by default

https://github.com/llvm/llvm-project/pull/88182
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