142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao/* 242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * Copyright 2012, The Android Open Source Project 342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * 442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * Licensed under the Apache License, Version 2.0 (the "License"); 542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * you may not use this file except in compliance with the License. 642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * You may obtain a copy of the License at 742b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * 842b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * http://www.apache.org/licenses/LICENSE-2.0 942b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * 1042b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * Unless required by applicable law or agreed to in writing, software 1142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * distributed under the License is distributed on an "AS IS" BASIS, 1242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * See the License for the specific language governing permissions and 1442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao * limitations under the License. 1542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao */ 1642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 1742b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/ADT/Triple.h> 1842b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/DerivedTypes.h> 1942b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/Function.h> 2042b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/Instructions.h> 2142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/IRBuilder.h> 2242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/Module.h> 2342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/Pass.h> 2442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/Type.h> 2542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include <llvm/Target/TargetData.h> 2642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 2742b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include "bcc/AndroidBitcode/ABCExpandVAArgPass.h" 2842b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 2942b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao#include "X86/X86ABCCompilerDriver.h" 3042b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 3142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liaonamespace { 3242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 3342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liaoclass X86ABCExpandVAArg : public bcc::ABCExpandVAArgPass { 3442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liaopublic: 3542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao virtual const char *getPassName() const { 3642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao return "X86 LLVM va_arg Instruction Expansion Pass"; 3742b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao } 3842b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 3942b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liaoprivate: 4042b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao // Derivative work from external/clang/lib/CodeGen/TargetInfo.cpp. 4142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao virtual llvm::Value *expandVAArg(llvm::Instruction *pInst) { 4242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Type *pty = pInst->getType(); 4342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Type *ty = pty->getContainedType(0); 4442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Value *va_list_addr = pInst->getOperand(0); 4542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::IRBuilder<> builder(pInst); 4642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao const llvm::TargetData *td = getAnalysisIfAvailable<llvm::TargetData>(); 4742b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 4842b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Type *bp = llvm::Type::getInt8PtrTy(*mContext); 4942b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Type *bpp = bp->getPointerTo(0); 5042b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Value *va_list_addr_bpp = builder.CreateBitCast(va_list_addr, 5142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao bpp, "ap"); 5242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Value *addr = builder.CreateLoad(va_list_addr_bpp, "ap.cur"); 5342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 5442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Value *addr_typed = builder.CreateBitCast(addr, pty); 5542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 5642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao // X86-32 stack type alignment is always 4. 5742b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao uint64_t offset = llvm::RoundUpToAlignment(td->getTypeSizeInBits(ty)/8, 4); 5842b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::Value *next_addr = builder.CreateGEP(addr, 5942b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao llvm::ConstantInt::get(llvm::Type::getInt32Ty(*mContext), offset), 6042b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao "ap.next"); 6142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao builder.CreateStore(next_addr, va_list_addr_bpp); 6242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 6342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao return addr_typed; 6442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao } 6542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 6642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao}; // end X86ABCExpandVAArg 6742b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 6842b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao} // end anonymous namespace 6942b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 7042b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liaonamespace bcc { 7142b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 7242b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei LiaoABCExpandVAArgPass *X86ABCCompilerDriver::createExpandVAArgPass() const { 7342b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao return new X86ABCExpandVAArg(); 7442b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao} 7542b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao 7642b88c3b3cdadf6fcd367ee2bc620c0c94bbfe1bShih-wei Liao} // end namespace bcc 77