[Mlir-commits] [mlir] [mlir][Interfaces] Add `mustProgress` interface method + folding pattern (PR #179039)

[Jakub Kuderski]

================
@@ -351,6 +351,18 @@ def RegionBranchOpInterface : OpInterface<"RegionBranchOpInterface"> {
       (ins "::mlir::Type":$lhs, "::mlir::Type":$rhs), [{}],
       /*defaultImplementation=*/[{ return lhs == rhs; }]
     >,
+    InterfaceMethod<[{
+        Region branch ops that "must progress" are required to terminate (i.e.,
+        not loop infinitely between their regions) or interact with the
----------------
kuhar wrote:

Does this also forbid function calls that may exit in the middle of the loop? I think the llvm world uses `willreturn` for this.

https://github.com/llvm/llvm-project/pull/179039