[clang] [CIR] Fix address space of string literals (PR #226996)

[Mariya Podchishchaeva via cfe-commits]

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@@ -460,6 +460,13 @@ class CIRGenModule : public CIRGenTypeCache {
   getAddrOfConstantStringFromLiteral(const StringLiteral *s,
                                      llvm::StringRef name = ".str");
 
+  /// Return the AST address space of constant literal, which is used to emit
+  /// the constant literal as global variable in CIR. This is not necessarily
+  /// the address space of the constant literal in AST. For address space
+  /// agnostic language, e.g. C++, constant literal in AST is always in the
+  /// default address space.
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Fznamznon wrote:

That just copies CodeGenUtils, right? Maybe we should instead just say it is a wrapper until SYCL support is in place.

https://github.com/llvm/llvm-project/pull/226996