1 /* 2 * Copyright 2012, 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 BCC_ABC_EXPAND_VAARG_PASS_H 18 #define BCC_ABC_EXPAND_VAARG_PASS_H 19 20 #include <llvm/Pass.h> 21 22 namespace llvm { 23 class Function; 24 class Instruction; 25 class LLVMContext; 26 class Value; 27 } // end llvm namespace 28 29 namespace bcc { 30 31 /* 32 * This pass expands va_arg LLVM instruction generated from llvm-ndk-cc. 33 * 34 * LLVM backend does not yet fully support va_arg on many targets. Also, 35 * it does not currently support va_arg with aggregate types on any target. 36 * Therefore, each target should implement its own verion of 37 * ABCExpandVAArg::expandVAArg to expand va_arg. 38 */ 39 40 class ABCExpandVAArgPass : public llvm::FunctionPass { 41 private: 42 static char ID; 43 44 protected: 45 llvm::LLVMContext *mContext; 46 47 private: 48 virtual llvm::Value *expandVAArg(llvm::Instruction *pInst) = 0; 49 50 public: 51 ABCExpandVAArgPass() : llvm::FunctionPass(ID), mContext(NULL) { } 52 53 virtual bool runOnFunction(llvm::Function &pFunc); 54 }; 55 56 } // end bcc namespace 57 58 #endif // BCC_ABC_EXPAND_VAARG_PASS_H 59
