1 //===- Trace.cpp - Implementation of Trace class --------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This class represents a single trace of LLVM basic blocks. A trace is a 11 // single entry, multiple exit, region of code that is often hot. Trace-based 12 // optimizations treat traces almost like they are a large, strange, basic 13 // block: because the trace path is assumed to be hot, optimizations for the 14 // fall-through path are made at the expense of the non-fall-through paths. 15 // 16 //===----------------------------------------------------------------------===// 17 18 #include "llvm/Analysis/Trace.h" 19 #include "llvm/Config/llvm-config.h" 20 #include "llvm/IR/BasicBlock.h" 21 #include "llvm/IR/Function.h" 22 #include "llvm/Support/Compiler.h" 23 #include "llvm/Support/Debug.h" 24 #include "llvm/Support/raw_ostream.h" 25 26 using namespace llvm; 27 28 Function *Trace::getFunction() const { 29 return getEntryBasicBlock()->getParent(); 30 } 31 32 Module *Trace::getModule() const { 33 return getFunction()->getParent(); 34 } 35 36 /// print - Write trace to output stream. 37 void Trace::print(raw_ostream &O) const { 38 Function *F = getFunction(); 39 O << "; Trace from function " << F->getName() << ", blocks:\n"; 40 for (const_iterator i = begin(), e = end(); i != e; ++i) { 41 O << "; "; 42 (*i)->printAsOperand(O, true, getModule()); 43 O << "\n"; 44 } 45 O << "; Trace parent function: \n" << *F; 46 } 47 48 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) 49 /// dump - Debugger convenience method; writes trace to standard error 50 /// output stream. 51 LLVM_DUMP_METHOD void Trace::dump() const { 52 print(dbgs()); 53 } 54 #endif 55
