54 lines · cpp
1//===- Trace.cpp - Implementation of Trace class --------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This class represents a single trace of LLVM basic blocks. A trace is a10// single entry, multiple exit, region of code that is often hot. Trace-based11// optimizations treat traces almost like they are a large, strange, basic12// block: because the trace path is assumed to be hot, optimizations for the13// fall-through path are made at the expense of the non-fall-through paths.14//15//===----------------------------------------------------------------------===//16 17#include "llvm/Analysis/Trace.h"18#include "llvm/Config/llvm-config.h"19#include "llvm/IR/BasicBlock.h"20#include "llvm/IR/Function.h"21#include "llvm/Support/Compiler.h"22#include "llvm/Support/Debug.h"23#include "llvm/Support/raw_ostream.h"24 25using namespace llvm;26 27Function *Trace::getFunction() const {28 return getEntryBasicBlock()->getParent();29}30 31Module *Trace::getModule() const {32 return getFunction()->getParent();33}34 35/// print - Write trace to output stream.36void Trace::print(raw_ostream &O) const {37 Function *F = getFunction();38 O << "; Trace from function " << F->getName() << ", blocks:\n";39 for (const_iterator i = begin(), e = end(); i != e; ++i) {40 O << "; ";41 (*i)->printAsOperand(O, true, getModule());42 O << "\n";43 }44 O << "; Trace parent function: \n" << *F;45}46 47#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)48/// dump - Debugger convenience method; writes trace to standard error49/// output stream.50LLVM_DUMP_METHOD void Trace::dump() const {51 print(dbgs());52}53#endif54