ABataev added inline comments.

================
Comment at: clang/lib/CodeGen/CGDecl.cpp:2618
+void CodeGenModule::EmitOMPAllocateDecl(const OMPAllocateDecl *D) {
+  for (Expr *E : const_cast<OMPAllocateDecl *>(D)->varlists()) {
+    auto *DE = cast<DeclRefExpr>(E);
----------------
jdoerfert wrote:
> ABataev wrote:
> > jdoerfert wrote:
> > > ABataev wrote:
> > > > Why need to remove constantness here?
> > > The problem is that the declaration, which might have been already 
> > > generated in IR or not, had no address space attached before. Now we want 
> > > to do that after the fact, potentially *way later*. To reuse the general 
> > > codegen mechanism I modify the VarDecl (temporarily) by attaching the new 
> > > address space and calling codegen again. If you have a better idea, I'm 
> > > happy to change this.
> > Why not just create it manually rather than rely on `GetOrCreateLLVMGlobal`?
> I'm not sure I follow. Creating a global is complicated, need to make sure 
> all the linkage, visibility, address space stuff is set up, mangling, etc. 
> Why would we duplicate all that code and risk messing things up now or in the 
> future?
And what about just setting the address-space on the LLVM type directly?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D101030/new/

https://reviews.llvm.org/D101030

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