[clang] [OpenCL] Put constant initializer globals into constant addrspace (PR #90048)

[Changpeng Fang via cfe-commits]

================
@@ -535,20 +535,23 @@ void AggExprEmitter::EmitArrayInit(Address DestPtr, llvm::ArrayType *AType,
       elementType.isTriviallyCopyableType(CGF.getContext())) {
     CodeGen::CodeGenModule &CGM = CGF.CGM;
     ConstantEmitter Emitter(CGF);
-    LangAS AS = ArrayQTy.getAddressSpace();
+    QualType GVArrayQTy = CGM.getContext().getAddrSpaceQualType(
+        CGM.getContext().removeAddrSpaceQualType(ArrayQTy),
----------------
changpeng wrote:

> I think it's a bug in removeAddrSpaceQualType(): it needs to special-case arrays. Arrays are weird because qualifiers on the element type also count as qualifiers on the type, so getSingleStepDesugaredType() can't remove the sugar on arrays. So it needs to strip the qualifier off the element type, then reconstruct the array type. Maybe it can use ASTC
getSingleStepDesugaredType
Yes, the issue is in removeAddrSpaceQualType(ArrayQTy),  And getSingleStepDesugaredType can not remove "Sugar".

https://github.com/llvm/llvm-project/pull/90048