llvm-project/flang/include/flang/Optimizer/CodeGen/CGPasses.td

//===-- CGPasses.td - code gen pass definition file --------*- tablegen -*-===//
//
// 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 file contains definitions for passes within the Optimizer/CodeGen/
//  directory.
//
//===----------------------------------------------------------------------===//

#ifndef FORTRAN_OPTIMIZER_CODEGEN_FIR_PASSES
#define FORTRAN_OPTIMIZER_CODEGEN_FIR_PASSES

include "mlir/Pass/PassBase.td"

def FIRToLLVMLowering : Pass<"fir-to-llvm-ir", "mlir::ModuleOp"> {
  let summary = "Convert FIR dialect to LLVM-IR dialect";
  let description = [{
    Convert the FIR dialect to the LLVM-IR dialect of MLIR. This conversion
    will also convert ops in the standard and FIRCG dialects.
  }];
  let constructor = "::fir::createFIRToLLVMPass()";
  let dependentDialects = ["mlir::LLVM::LLVMDialect", "mlir::DLTIDialect"];
  let options = [
    Option<"forcedTargetTriple", "target", "std::string", /*default=*/"",
           "Override module's target triple.">,
    Option<"forcedDataLayout", "datalayout", "std::string", /*default=*/"",
           "Override module's data layout.">,
    Option<"forcedTargetCPU", "target-cpu", "std::string", /*default=*/"",
           "Override module's target CPU.">,
    Option<"forcedTuneCPU", "tune-cpu", "std::string", /*default=*/"",
           "Override module's tune CPU.">,
    Option<"forcedTargetFeatures", "target-features", "std::string",
           /*default=*/"", "Override module's target features.">,
    Option<"applyTBAA", "apply-tbaa", "bool", /*default=*/"false",
           "Attach TBAA tags to memory accessing operations.">,
    Option<"typeDescriptorsRenamedForAssembly",
           "type-descriptors-renamed-for-assembly", "bool", /*default=*/"false",
           "Global variables created to describe derived types "
           "have been renamed to avoid special symbols in their names.">
  ];
}

def CodeGenRewrite : Pass<"cg-rewrite", "mlir::ModuleOp"> {
  let summary = "Rewrite some FIR ops into their code-gen forms.";
  let description = [{
    Fuse specific subgraphs into single Ops for code generation.
  }];
  let dependentDialects = [
    "fir::FIROpsDialect", "fir::FIRCodeGenDialect"
  ];
  let options = [
    Option<"preserveDeclare", "preserve-declare", "bool", /*default=*/"false",
           "Preserve DeclareOp during pre codegen re-write.">
  ];
  let statistics = [
    Statistic<"numDCE", "num-dce'd", "Number of operations eliminated">
  ];
}

def TargetRewritePass : Pass<"target-rewrite", "mlir::ModuleOp"> {
  let summary = "Rewrite some FIR dialect into target specific forms.";
  let description = [{
      Certain abstractions in the FIR dialect need to be rewritten to reflect
      representations that may differ based on the target machine.
  }];
  let dependentDialects = [ "fir::FIROpsDialect", "mlir::func::FuncDialect",
                            "mlir::DLTIDialect", "mlir::LLVM::LLVMDialect" ];
  let options = [
    Option<"forcedTargetTriple", "target", "std::string", /*default=*/"",
           "Override module's target triple.">,
    Option<"forcedTargetCPU", "target-cpu", "std::string", /*default=*/"",
           "Override module's target CPU.">,
    Option<"forcedTuneCPU", "tune-cpu", "std::string", /*default=*/"",
           "Override module's tune CPU.">,
    Option<"forcedTargetFeatures", "target-features", "std::string",
           /*default=*/"", "Override module's target features.">,
    Option<"noCharacterConversion", "no-character-conversion",
           "bool", /*default=*/"false",
           "Disable target-specific conversion of CHARACTER.">,
    Option<"noComplexConversion", "no-complex-conversion",
           "bool", /*default=*/"false",
           "Disable target-specific conversion of COMPLEX.">,
    Option<"noStructConversion", "no-struct-conversion",
           "bool", /*default=*/"false",
           "Disable target-specific conversion of derived type value.">
  ];
}

def BoxedProcedurePass : Pass<"boxed-procedure", "mlir::ModuleOp"> {
  let options =
      [Option<
           "useThunks", "use-thunks", "bool", /*default=*/"true",
           "Convert procedure pointer abstractions to a single code pointer, "
           "deploying thunks wherever required.">,
       Option<
           "useSafeTrampoline", "use-safe-trampoline", "bool",
           /*default=*/"false",
           "Use runtime trampoline pool instead of stack-based trampolines "
           "for W^X compliance. When enabled, internal procedure pointers "
           "use a runtime-managed pool of executable trampolines with "
           "separate data region, avoiding the need for an executable stack.">];
}

def LowerRepackArraysPass : Pass<"lower-repack-arrays", "mlir::ModuleOp"> {
  let summary = "Convert fir.pack/unpack_array to other FIR operations";
  let description = [{
    Convert fir.pack/unpack_array operations to other FIR operations
    and Fortran runtime calls that implement the semantics
    of packing/unpacking.
  }];
  let dependentDialects = ["fir::FIROpsDialect", "mlir::arith::ArithDialect",
                           "mlir::func::FuncDialect"];
}

#endif // FORTRAN_OPTIMIZER_CODEGEN_FIR_PASSES