Revert "[flang][fir] Add fir-opt tool"

This reverts commit df1eeaa7b404f7c5a96a812479f0ee2ce8354f6a.

Buildbot failure.

flang/test/CMakeLists.txt

@@ -34,7 +34,7 @@ set(FLANG_TEST_PARAMS
   flang_site_config=${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg.py)
 
 set(FLANG_TEST_DEPENDS
-  f18 FileCheck count not module_files fir-opt
+  f18 FileCheck count not module_files
 )
 
 list(APPEND FLANG_TEST_DEPENDS tco)

flang/test/Fir/fir-ops.fir

@@ -1,6 +1,6 @@
 // Test the FIR operations
-// Parse operations and check that we can reparse what we print.
-// RUN: fir-opt %s | fir-opt | FileCheck %s
+
+// RUN: tco -emit-fir %s | tco -emit-fir | FileCheck %s
 
 // CHECK-LABEL: func private @it1() -> !fir.int<4>
 // CHECK: func private @box1() -> !fir.boxchar<2>

flang/test/Fir/fir-types.fir

@@ -1,6 +1,6 @@
 // Test the FIR types
-// Parse types and check that we can reparse what we print.
-// RUN: fir-opt %s | fir-opt | FileCheck %s
+
+// RUN: tco -emit-fir %s | tco -emit-fir | FileCheck %s
 
 // Fortran Intrinsic types
 // CHECK-LABEL: func private @it1() -> !fir.int<4>

flang/tools/CMakeLists.txt

@@ -12,4 +12,3 @@ if(FLANG_BUILD_NEW_DRIVER)
 endif()
 add_subdirectory(tco)
 add_subdirectory(f18-parse-demo)
-add_subdirectory(fir-opt)

flang/tools/fir-opt/CMakeLists.txt

@@ -1,13 +0,0 @@
-add_flang_tool(fir-opt fir-opt.cpp)
-llvm_update_compile_flags(fir-opt)
-get_property(dialect_libs GLOBAL PROPERTY MLIR_DIALECT_LIBS)
-
-target_link_libraries(fir-opt PRIVATE
-  FIROptimizer
-  ${dialect_libs}
-
-  # TODO: these should be transitive dependencies from a target providing
-  # "registerFIRPasses()"
-  MLIRAffineToStandard
-  MLIROptLib
-)

flang/tools/fir-opt/fir-opt.cpp

@@ -1,25 +0,0 @@
-//===- fir-opt.cpp - FIR Optimizer Driver -----------------------*- C++ -*-===//
-//
-// 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 is to be like LLVM's opt program, only for FIR.  Such a program is
-// required for roundtrip testing, etc.
-//
-//===----------------------------------------------------------------------===//
-
-#include "mlir/Support/MlirOptMain.h"
-#include "flang/Optimizer/Dialect/FIRDialect.h"
-
-using namespace mlir;
-
-int main(int argc, char **argv) {
-  fir::registerFIRPasses();
-  DialectRegistry registry;
-  fir::registerFIRDialects(registry);
-  return failed(MlirOptMain(argc, argv, "FIR modular optimizer driver\n",
-      registry, /*preloadDialectsInContext*/ false));
-}