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

[Matt Arsenault via cfe-commits]

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@@ -21,9 +21,12 @@ ABIArgInfo DefaultABIInfo::classifyArgumentType(QualType Ty) const {
     // Records with non-trivial destructors/copy-constructors should not be
     // passed by value.
     if (CGCXXABI::RecordArgABI RAA = getRecordArgABI(Ty, getCXXABI()))
-      return getNaturalAlignIndirect(Ty, RAA == CGCXXABI::RAA_DirectInMemory);
+      return getNaturalAlignIndirect(
+          Ty, getContext().getTargetAddressSpace(LangAS::Default),
+          RAA == CGCXXABI::RAA_DirectInMemory);
 
-    return getNaturalAlignIndirect(Ty);
+    return getNaturalAlignIndirect(
+        Ty, getContext().getTargetAddressSpace(LangAS::Default));
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arsenm wrote:

In this case I think just using the hardcoded 0 is less wrong than using the "LangAS::Default". This just happens to work out correctly for the OpenCL 1.x hack on amdgpu 

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