[Mlir-commits] [mlir] [mlir][LLVMIR] Add IFuncOp to LLVM dialect (PR #147697)

[Tobias Gysi]

================
@@ -1601,6 +1605,67 @@ def LLVM_AliasOp : LLVM_Op<"mlir.alias",
   let hasRegionVerifier = 1;
 }
 
+def LLVM_IFuncOp : LLVM_Op<"mlir.ifunc",
+    [IsolatedFromAbove, Symbol, DeclareOpInterfaceMethods<SymbolUserOpInterface>]> {
+  let arguments = (ins
+    SymbolNameAttr:$sym_name,
+    TypeAttr:$i_func_type,
+    FlatSymbolRefAttr:$resolver,
+    TypeAttr:$resolver_type,
+    Linkage:$linkage,
+    UnitAttr:$dso_local,
+    DefaultValuedAttr<ConfinedAttr<I32Attr, [IntNonNegative]>, "0">:$address_space,
+    DefaultValuedAttr<UnnamedAddr, "mlir::LLVM::UnnamedAddr::None">:$unnamed_addr,
+    DefaultValuedAttr<Visibility, "mlir::LLVM::Visibility::Default">:$visibility_
+  );
+  let summary = "LLVM dialect ifunc";
+  let description = [{
+    `llvm.mlir.ifunc` is a top level operation that defines a global ifunc.
+    It defines a new symbol and takes a symbol refering to a resolver function.
+    IFuncs can be called as regular functions. The function type is the same
+    as the IFuncType. The symbol is resolved at runtime by calling a resolver
+    function.
+
+    Examples:
+
+    ```mlir
+    // IFuncs have @-identifier and use a resolver function.
----------------
gysit wrote:

```suggestion
    // IFuncs resolve a symbol at runtime using a resovler function.
```
nit: I would make it a bit more specific.

https://github.com/llvm/llvm-project/pull/147697