[flang][NFC] Remove out of date IO helper

Functionality in IO.h and IO.cpp have been upstreamed together with the frontend
when flang landed upstream. Those files are out of date compared with fir-dev.
These functionality will be upstreamed again when needed in the lowering process
with an up to date code and a proper review.

These files (and the functions it contains) are not currently used. Hence
removing it is NFC.

Reviewed By: kiranchandramohan

Differential Revision: https://reviews.llvm.org/D118593

flang/include/flang/Lower/IO.h

@@ -1,98 +0,0 @@
-//===-- Lower/IO.h -- lower I/O statements ----------------------*- 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
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef FORTRAN_LOWER_IO_H
-#define FORTRAN_LOWER_IO_H
-
-#include "flang/Common/reference.h"
-#include "flang/Semantics/symbol.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/SmallSet.h"
-
-namespace mlir {
-class Value;
-} // namespace mlir
-
-namespace Fortran {
-namespace parser {
-using Label = std::uint64_t;
-struct BackspaceStmt;
-struct CloseStmt;
-struct EndfileStmt;
-struct FlushStmt;
-struct InquireStmt;
-struct OpenStmt;
-struct PrintStmt;
-struct ReadStmt;
-struct RewindStmt;
-struct WaitStmt;
-struct WriteStmt;
-} // namespace parser
-
-namespace lower {
-
-class AbstractConverter;
-class BridgeImpl;
-
-namespace pft {
-struct Evaluation;
-using LabelEvalMap = llvm::DenseMap<Fortran::parser::Label, Evaluation *>;
-using SymbolRef = Fortran::common::Reference<const Fortran::semantics::Symbol>;
-using LabelSet = llvm::SmallSet<Fortran::parser::Label, 4>;
-using SymbolLabelMap = llvm::DenseMap<SymbolRef, LabelSet>;
-} // namespace pft
-
-/// Generate IO call(s) for BACKSPACE; return the IOSTAT code
-mlir::Value genBackspaceStatement(AbstractConverter &,
-                                  const parser::BackspaceStmt &);
-
-/// Generate IO call(s) for CLOSE; return the IOSTAT code
-mlir::Value genCloseStatement(AbstractConverter &, const parser::CloseStmt &);
-
-/// Generate IO call(s) for ENDFILE; return the IOSTAT code
-mlir::Value genEndfileStatement(AbstractConverter &,
-                                const parser::EndfileStmt &);
-
-/// Generate IO call(s) for FLUSH; return the IOSTAT code
-mlir::Value genFlushStatement(AbstractConverter &, const parser::FlushStmt &);
-
-/// Generate IO call(s) for INQUIRE; return the IOSTAT code
-mlir::Value genInquireStatement(AbstractConverter &,
-                                const parser::InquireStmt &);
-
-/// Generate IO call(s) for OPEN; return the IOSTAT code
-mlir::Value genOpenStatement(AbstractConverter &, const parser::OpenStmt &);
-
-/// Generate IO call(s) for PRINT
-void genPrintStatement(AbstractConverter &converter,
-                       const parser::PrintStmt &stmt,
-                       pft::LabelEvalMap &labelMap,
-                       pft::SymbolLabelMap &assignMap);
-
-/// Generate IO call(s) for READ; return the IOSTAT code
-mlir::Value genReadStatement(AbstractConverter &converter,
-                             const parser::ReadStmt &stmt,
-                             pft::LabelEvalMap &labelMap,
-                             pft::SymbolLabelMap &assignMap);
-
-/// Generate IO call(s) for REWIND; return the IOSTAT code
-mlir::Value genRewindStatement(AbstractConverter &, const parser::RewindStmt &);
-
-/// Generate IO call(s) for WAIT; return the IOSTAT code
-mlir::Value genWaitStatement(AbstractConverter &, const parser::WaitStmt &);
-
-/// Generate IO call(s) for WRITE; return the IOSTAT code
-mlir::Value genWriteStatement(AbstractConverter &converter,
-                              const parser::WriteStmt &stmt,
-                              pft::LabelEvalMap &labelMap,
-                              pft::SymbolLabelMap &assignMap);
-
-} // namespace lower
-} // namespace Fortran
-
-#endif // FORTRAN_LOWER_IO_H

flang/lib/Lower/CMakeLists.txt

@@ -7,7 +7,6 @@ add_flang_library(FortranLower
   CharacterRuntime.cpp
   Coarray.cpp
   ConvertType.cpp
-  IO.cpp
   Mangler.cpp
   OpenACC.cpp
   OpenMP.cpp