[Mlir-commits] [mlir] [MLIR][Wasm] Introduce the WasmSSA MLIR dialect (PR #149233)

[Mehdi Amini]

================
@@ -0,0 +1,186 @@
+//===-- WebAssemblySSAInterfaces.td - WebAssemblySSA Interfaces -*- tablegen -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines interfaces for the WebAssemblySSA dialect in MLIR.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef WEBASSEMBLYSSA_INTERFACES
+#define WEBASSEMBLYSSA_INTERFACES
+
+include "mlir/IR/OpBase.td"
+include "mlir/IR/BuiltinAttributes.td"
+
+def WasmSSALabelLevelInterface : OpInterface<"WasmSSALabelLevelInterface"> {
+  let description = [{
+    Operation that defines one level of nesting for wasm branching.
+    These operation region can be targeted by branch instructions.
+  }];
+  let methods = [
+    InterfaceMethod<
+      /*desc=*/        "Returns the target block address",
+      /*returnType=*/  "::mlir::Block*",
+      /*methodName=*/  "getLabelTarget",
+      /*args=*/        (ins)
+    >
+  ];
+}
+
+def WasmSSALabelBranchingInterface : OpInterface<"WasmSSALabelBranchingInterface"> {
+  let description = [{
+    Wasm operation that targets a label for a jump.
+  }];
+  let methods = [
+    InterfaceMethod<
+      /*desc=*/        "Returns the number of context to break from",
+      /*returnType=*/  "size_t",
+      /*methodName=*/  "getExitLevel",
+      /*args=*/        (ins)
+    >,
----------------
joker-eph wrote:

> E.g we would have something like this

I can't parse the example right now, is this supposed to be MLIR or some sort of pseudo-code?

> Depending on the likeliness for it to land soon (maybe @joker-eph have information on this?) 

I'm shooting for the end of August right now.


> The multi level jumps is in infraction with the LangRef, 

I do have a strong objection to anything that violates LangRef right now, but I didn't parse the example (didn't spent too much time either right now) so I would have to understand this more before emitting a definitive opinion on this.


https://github.com/llvm/llvm-project/pull/149233