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Support pointer argument of built-in functions #2018

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Support pointer argument of built-in functions #2018

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432978e
Support pointer argument of builtin functions
Nov 24, 2025
a731166
Code review fixes
Nov 25, 2025
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27 changes: 24 additions & 3 deletions clang/lib/CIR/CodeGen/CIRGenBuiltin.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -498,7 +498,12 @@ decodeFixedType(ArrayRef<llvm::Intrinsic::IITDescriptor> &infos,
return cir::VectorType::get(context, elementType, numElements);
}
case IITDescriptor::Pointer:
llvm_unreachable("NYI: IITDescriptor::Pointer");
case IITDescriptor::Pointer: {
mlir::Type pointee = {};
auto addrSpace =
static_cast<cir::AddressSpace>(descriptor.Pointer_AddressSpace);
return cir::PointerType::get(context, pointee, addrSpace);
}
case IITDescriptor::Struct:
llvm_unreachable("NYI: IITDescriptor::Struct");
case IITDescriptor::Argument:
Expand Down Expand Up @@ -2803,8 +2808,24 @@ RValue CIRGenFunction::emitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
mlir::Type correctedExpectedTy =
getIntrinsicArgumentTypeFromAST(expectedTy, E, i, &getMLIRContext());

if (argType != correctedExpectedTy)
llvm_unreachable("NYI");
if (argType != correctedExpectedTy) {
if (isa<cir::PointerType>(argType)) {
auto ptrType = mlir::cast<cir::PointerType>(argType);
auto expectedPtrType = mlir::cast<cir::PointerType>(expectedTy);
if (ptrType.getPointee() != expectedPtrType.getPointee()) {
if (expectedPtrType.getAddrSpace() != ptrType.getAddrSpace()) {
auto newPtrType =
cir::PointerType::get(&getMLIRContext(), ptrType.getPointee(),
expectedPtrType.getAddrSpace());
argValue = builder.createAddrSpaceCast(argValue, newPtrType);
}
} else {
llvm_unreachable("NYI");
}
} else {
llvm_unreachable("NYI");
}
}

args.push_back(argValue);
}
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