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      1 /*
      2  * Copyright 2015, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef _FRAMEWORKS_COMPILE_SLANG_RS_FOREACH_LOWERING_H
     18 #define _FRAMEWORKS_COMPILE_SLANG_RS_FOREACH_LOWERING_H
     19 
     20 #include "clang/AST/StmtVisitor.h"
     21 
     22 namespace clang {
     23   class ASTContext;
     24   class CallExpr;
     25   class Expr;
     26   class FunctionDecl;
     27 }
     28 
     29 namespace slang {
     30 
     31 class RSContext;
     32 
     33 class RSForEachLowering : public clang::StmtVisitor<RSForEachLowering> {
     34  public:
     35   explicit RSForEachLowering(RSContext* ctxt);
     36 
     37   // Given a FunctionDecl FD and the target API level, either translates all
     38   // rsForEach() and rsForEachWithOptions() calls inside FD into calls to the
     39   // low-level rsForEachInternal() API, if FD is not a kernel function itself;
     40   // or, in the case where FD is a kernel function, reports a compiler error on
     41   // any calls to either kernel launching API function.
     42   void handleForEachCalls(clang::FunctionDecl* FD, unsigned int targetAPI);
     43 
     44   void VisitCallExpr(clang::CallExpr *CE);
     45   void VisitStmt(clang::Stmt *S);
     46 
     47  private:
     48   RSContext* mCtxt;
     49   clang::ASTContext& mASTCtxt;
     50   // A flag, if true, indicating that the visitor is walking inside a kernel
     51   // function, in which case any call to rsForEach() or rsForEachWithOptions()
     52   // is a compiler error.
     53   bool mInsideKernel;
     54 
     55   const clang::FunctionDecl* matchFunctionDesignator(clang::Expr* expr);
     56   const clang::FunctionDecl* matchKernelLaunchCall(clang::CallExpr* CE,
     57                                                    int* slot,
     58                                                    bool* hasOptions);
     59   clang::FunctionDecl* CreateForEachInternalFunctionDecl();
     60   clang::Expr* CreateCalleeExprForInternalForEach();
     61 };  // RSForEachLowering
     62 
     63 }  // namespace slang
     64 
     65 #endif  // _FRAMEWORKS_COMPILE_SLANG_RS_FOREACH_LOWERING_H
     66