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_H 18 #define BCC_ABC_EXPAND_VAARG_H 19 20 #include "bcc/AndroidBitcode/ABCExpandVAArgPass.h" 21 22 #include <llvm/Instructions.h> 23 #include <llvm/Support/InstIterator.h> 24 25 namespace bcc { 26 27 char ABCExpandVAArgPass::ID = 0; 28 29 bool ABCExpandVAArgPass::runOnFunction(llvm::Function &pFunc) { 30 bool changed = false; 31 32 mContext = &pFunc.getContext(); 33 34 // process va_arg inst 35 for (llvm::inst_iterator inst = llvm::inst_begin(pFunc), 36 inst_end = llvm::inst_end(pFunc); inst != inst_end; inst++) { 37 if (inst->getOpcode() == llvm::Instruction::VAArg) { 38 llvm::Value *v = expandVAArg(&*inst); 39 inst->replaceAllUsesWith(v); 40 inst->eraseFromParent(); 41 changed = true; 42 continue; 43 } 44 } 45 return changed; 46 } 47 48 } // end bcc namespace 49 50 #endif // BCC_ABC_EXPAND_VAARG_H 51
