[clang] [CIR] Add token type and none token attribute for coroutine intrinsics (PR #194515)

[Erich Keane via cfe-commits]

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@@ -1642,4 +1640,80 @@ Address CIRGenFunction::emitVAListRef(const Expr *e) {
   return emitLValue(e).getAddress();
 }
 
+cir::FuncType
+CIRGenFunction::getIntrinsicType(mlir::MLIRContext *context,
+                                 llvm::Intrinsic::ID id,
+                                 const IntrinsicTypeOptions &opts) {
+  using namespace llvm::Intrinsic;
+
+  SmallVector<IITDescriptor, 8> table;
+  getIntrinsicInfoTableEntries(id, table);
+
+  ArrayRef<IITDescriptor> tableRef = table;
+  mlir::Type resultTy = decodeFixedType(tableRef, context, opts);
+
+  SmallVector<mlir::Type, 8> argTypes;
+  bool isVarArg = false;
+  while (!tableRef.empty()) {
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erichkeane wrote:

Why a while loop and not a range-for loop?  

Also, how is this not an infinite loop?   `tableRef` doesn't seem to be modified here.

https://github.com/llvm/llvm-project/pull/194515