| //===-- JumpInstrTableInfo.cpp: Info for Jump-Instruction Tables ----------===// |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// \brief Information about jump-instruction tables that have been created by |
| /// JumpInstrTables pass. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #define DEBUG_TYPE "jiti" |
| |
| #include "llvm/Analysis/JumpInstrTableInfo.h" |
| #include "llvm/Analysis/Passes.h" |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/Type.h" |
| #include "llvm/Support/MathExtras.h" |
| |
| using namespace llvm; |
| |
| INITIALIZE_PASS(JumpInstrTableInfo, "jump-instr-table-info", |
| "Jump-Instruction Table Info", true, true) |
| char JumpInstrTableInfo::ID = 0; |
| |
| ImmutablePass *llvm::createJumpInstrTableInfoPass() { |
| return new JumpInstrTableInfo(); |
| } |
| |
| ModulePass *llvm::createJumpInstrTableInfoPass(unsigned Bound) { |
| // This cast is always safe, since Bound is always in a subset of uint64_t. |
| uint64_t B = static_cast<uint64_t>(Bound); |
| return new JumpInstrTableInfo(B); |
| } |
| |
| JumpInstrTableInfo::JumpInstrTableInfo(uint64_t ByteAlign) |
| : ImmutablePass(ID), Tables(), ByteAlignment(ByteAlign) { |
| if (!llvm::isPowerOf2_64(ByteAlign)) { |
| // Note that we don't explicitly handle overflow here, since we handle the 0 |
| // case explicitly when a caller actually tries to create jumptable entries, |
| // and this is the return value on overflow. |
| ByteAlignment = llvm::NextPowerOf2(ByteAlign); |
| } |
| |
| initializeJumpInstrTableInfoPass(*PassRegistry::getPassRegistry()); |
| } |
| |
| JumpInstrTableInfo::~JumpInstrTableInfo() {} |
| |
| void JumpInstrTableInfo::insertEntry(FunctionType *TableFunTy, Function *Target, |
| Function *Jump) { |
| Tables[TableFunTy].push_back(JumpPair(Target, Jump)); |
| } |