16ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner//===- Trace.cpp - Implementation of Trace class --------------------------===// 26ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// 36ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// The LLVM Compiler Infrastructure 46ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// 54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source 64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details. 76ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// 86ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner//===----------------------------------------------------------------------===// 96ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// 106ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// This class represents a single trace of LLVM basic blocks. A trace is a 116ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// single entry, multiple exit, region of code that is often hot. Trace-based 126ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// optimizations treat traces almost like they are a large, strange, basic 136ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// block: because the trace path is assumed to be hot, optimizations for the 146ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// fall-through path are made at the expense of the non-fall-through paths. 156ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner// 166ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner//===----------------------------------------------------------------------===// 176ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner 186ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner#include "llvm/Analysis/Trace.h" 190b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/Function.h" 20c48e3d1870dbb8f5fdecc1615fb80d62a1c3d943David Greene#include "llvm/Support/Debug.h" 21bdff548e4dd577a72094d57b282de4e765643b96Chris Lattner#include "llvm/Support/raw_ostream.h" 226ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattnerusing namespace llvm; 236ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner 246ba8972919b79996e7b9d646ca005d81dbebd04aChris LattnerFunction *Trace::getFunction() const { 256ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner return getEntryBasicBlock()->getParent(); 266ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner} 276ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner 286ba8972919b79996e7b9d646ca005d81dbebd04aChris LattnerModule *Trace::getModule() const { 296ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner return getFunction()->getParent(); 306ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner} 316ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner 326ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner/// print - Write trace to output stream. 336ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner/// 34bdff548e4dd577a72094d57b282de4e765643b96Chris Lattnervoid Trace::print(raw_ostream &O) const { 35bdff548e4dd577a72094d57b282de4e765643b96Chris Lattner Function *F = getFunction(); 36a7b0cb759433c715065440ee2a963a04db7f2b0bBenjamin Kramer O << "; Trace from function " << F->getName() << ", blocks:\n"; 376f81b510217bd87f265cca054c5d9885250d8525Bill Wendling for (const_iterator i = begin(), e = end(); i != e; ++i) { 386ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner O << "; "; 3936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines (*i)->printAsOperand(O, true, getModule()); 406ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner O << "\n"; 416ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner } 426ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner O << "; Trace parent function: \n" << *F; 436ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner} 446ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner 45286c4dc355b8be6806081b23c3097485821c7642Manman Ren#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) 466ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner/// dump - Debugger convenience method; writes trace to standard error 476ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner/// output stream. 486ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner/// 496f81b510217bd87f265cca054c5d9885250d8525Bill Wendlingvoid Trace::dump() const { 50c48e3d1870dbb8f5fdecc1615fb80d62a1c3d943David Greene print(dbgs()); 516ba8972919b79996e7b9d646ca005d81dbebd04aChris Lattner} 52cc77eece74c8db09acc2af425e7e6c88a5bb30d1Manman Ren#endif 53