[Func][GPU] Create func::ConstantOp using parents with SymbolTable trait

Author: Artem Kroviakov

mlir/lib/Dialect/Func/IR/FuncOps.cpp

@@ -128,7 +128,9 @@ LogicalResult ConstantOp::verify() {
   Type type = getType();
 
   // Try to find the referenced function.
-  auto fn = (*this)->getParentOfType<ModuleOp>().lookupSymbol<FuncOp>(fnName);
+  SymbolTable symbolTable(
+      (*this)->getParentWithTrait<mlir::OpTrait::SymbolTable>());
+  auto fn = symbolTable.lookup<FuncOp>(fnName);
   if (!fn)
     return emitOpError() << "reference to undefined function '" << fnName
                          << "'";

mlir/test/Integration/GPU/CUDA/indirect-call.mlir

@@ -0,0 +1,34 @@
+// RUN: mlir-opt %s \
+// RUN: | mlir-opt -gpu-lower-to-nvvm-pipeline="cubin-format=%gpu_compilation_format" \
+// RUN: | mlir-cpu-runner \
+// RUN:   --shared-libs=%mlir_cuda_runtime \
+// RUN:   --shared-libs=%mlir_runner_utils \
+// RUN:   --entry-point-result=void \
+// RUN: | FileCheck %s
+
+// CHECK: Hello from 0, 1, 3.000000
+module attributes {gpu.container_module} {
+    gpu.module @kernels {
+        func.func @hello(%arg0 : f32) {
+            %0 = gpu.thread_id x
+            %csti8 = arith.constant 2 : i8
+            gpu.printf "Hello from %lld, %d, %f\n" %0, %csti8, %arg0  : index, i8, f32
+            return
+        }
+    
+        gpu.func @hello_indirect() kernel {
+            %cstf32 = arith.constant 3.0 : f32
+            %func_ref = func.constant @hello : (f32) -> ()
+            func.call_indirect %func_ref(%cstf32) : (f32) -> ()
+            gpu.return
+        }
+    }
+
+    func.func @main() {
+        %c1 = arith.constant 1 : index
+        gpu.launch_func @kernels::@hello_indirect
+            blocks in (%c1, %c1, %c1)
+            threads in (%c1, %c1, %c1)
+        return
+    }
+}