[clang] [clang][CodeGen] `sret` args should always point to the `alloca` AS, so use that (PR #114062)

[John McCall via cfe-commits]

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@@ -225,7 +225,9 @@ ABIArgInfo AMDGPUABIInfo::classifyArgumentType(QualType Ty, bool Variadic,
     // Records with non-trivial destructors/copy-constructors should not be
     // passed by value.
     if (auto RAA = getRecordArgABI(Ty, getCXXABI()))
-      return getNaturalAlignIndirect(Ty, RAA == CGCXXABI::RAA_DirectInMemory);
+      return getNaturalAlignIndirect(
+          Ty, getContext().getTargetAddressSpace(LangAS::Default),
+          RAA == CGCXXABI::RAA_DirectInMemory);
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rjmccall wrote:

AMDGPU seems to generally use the private AS for indirect arguments; are you intentionally using the default AS for non-POD C++ arguments?

https://github.com/llvm/llvm-project/pull/114062