[clang] [CIR] Upstream TryCallOp (PR #165303)

[Andy Kaylor via cfe-commits]

================
@@ -2707,6 +2707,98 @@ def CIR_CallOp : CIR_CallOpBase<"call", [NoRegionArguments]> {
   ];
 }
 
+def CIR_TryCallOp : CIR_CallOpBase<"try_call",[
+  DeclareOpInterfaceMethods<BranchOpInterface>,
+  Terminator, AttrSizedOperandSegments
+]> {
+  let summary = "try_call operation";
+
+  let description = [{
+    Mostly similar to cir.call but requires two destination
+    branches, one for handling exceptions in case its thrown and
+    the other one to follow on regular control-flow.
+
+    Example:
+
+    ```mlir
+    // Direct call
+    %result = cir.try_call @division(%a, %b) ^continue, ^landing_pad 
+      : (f32, f32) -> f32
+    ```
+  }];
+
+  let arguments = !con((ins
+    Variadic<CIR_AnyType>:$contOperands,
+    Variadic<CIR_AnyType>:$landingPadOperands
----------------
andykaylor wrote:

What are these arguments? Are they operands that are passed to the continue and landing pad blocks or are they the continue and landing pad blocks themselves? If the latter, I don't understand why they are variadic and any type. If the former, are they even used?

https://github.com/llvm/llvm-project/pull/165303