text: // Copyright 2022 The Clspv Authors. All rights reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #include "llvm/IR/Module.h"
  #include "llvm/IR/PassManager.h"
  
  #ifndef _CLSPV_LIB_DIRECT_RESOURCE_ACCESS_PASS_H
  #define _CLSPV_LIB_DIRECT_RESOURCE_ACCESS_PASS_H
  
  namespace clspv {
  struct DirectResourceAccessPass
      : llvm::PassInfoMixin<DirectResourceAccessPass> {
    llvm::PreservedAnalyses run(llvm::Module &M, llvm::ModuleAnalysisManager &);
  
  private:
    // For each kernel argument that will map to a resource variable (descriptor),
    // try to rewrite the uses of the argument as a direct access of the resource.
    // We can only do this if all the callees of the function use the same
    // resource access value for that argument.  Returns true if the module
    // changed.
    bool RewriteResourceAccesses(llvm::Function *fn);
  
    // Rewrite uses of this resrouce-based arg if all the callers pass in the
    // same resource access.  Returns true if the module changed.
    bool RewriteAccessesForArg(llvm::Function *fn, int arg_index,
                               llvm::Argument &arg);
  };
  } // namespace clspv
  
  #endif // _CLSPV_LIB_DIRECT_RESOURCE_ACCESS_PASS_H
  