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[CIR][OpenCL] Support lowering of OCL opaque types #2020

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[CIR][OpenCL] Support lowering of OCL opaque types #2020

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dc0ffd7
[CIR][OpenCL] Support lowering of OCL opaque types
Nov 24, 2025
0eb9550
adding test
Nov 25, 2025
9f18821
Support general and minimal ocl opaque type
Dec 1, 2025
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14 changes: 12 additions & 2 deletions clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1945,8 +1945,18 @@ mlir::Value ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
return emitComplexToScalarConversion(CGF.getLoc(CE->getExprLoc()), V, Kind,
DestTy);
}
case CK_ZeroToOCLOpaqueType:
llvm_unreachable("NYI");
case CK_ZeroToOCLOpaqueType: {
// OpenCL: event_t e = async_work_group_copy(..., 0);
// The source is an integer constant zero; the destination is an OpenCL
// opaque type
mlir::Type destTy = CGF.convertType(DestTy);
auto PtrTy =
cir::PointerType::get(destTy, cir::AddressSpace::OffloadPrivate);
auto constNullPtrAttr = Builder.getConstNullPtrAttr(PtrTy);
auto nullVal =
Builder.getConstant(CGF.getLoc(E->getExprLoc()), constNullPtrAttr);
return nullVal;
}
case CK_IntToOCLSampler:
llvm_unreachable("NYI");

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7 changes: 6 additions & 1 deletion clang/lib/CIR/CodeGen/CIRGenTypes.cpp
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Expand Up @@ -516,8 +516,13 @@ mlir::Type CIRGenTypes::convertType(QualType T) {
case BuiltinType::OCLEvent:
case BuiltinType::OCLClkEvent:
case BuiltinType::OCLQueue:
ResultType = Builder.getVoidPtrTy();
break;
case BuiltinType::OCLReserveID:
assert(0 && "not implemented");
ResultType = cir::RecordType::get(
&getMLIRContext(), {},
mlir::StringAttr::get(&getMLIRContext(), "ocl_reserve_id"), false,
false, cir::RecordType::Struct);
break;
case BuiltinType::SveInt8:
case BuiltinType::SveUint8:
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