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       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           0 : Function *Trace::getFunction() const {
      29           0 :   return getEntryBasicBlock()->getParent();
      30             : }
      31             : 
      32           0 : Module *Trace::getModule() const {
      33           0 :   return getFunction()->getParent();
      34             : }
      35             : 
      36             : /// print - Write trace to output stream.
      37           0 : void Trace::print(raw_ostream &O) const {
      38           0 :   Function *F = getFunction();
      39           0 :   O << "; Trace from function " << F->getName() << ", blocks:\n";
      40           0 :   for (const_iterator i = begin(), e = end(); i != e; ++i) {
      41           0 :     O << "; ";
      42           0 :     (*i)->printAsOperand(O, true, getModule());
      43           0 :     O << "\n";
      44             :   }
      45           0 :   O << "; Trace parent function: \n" << *F;
      46           0 : }
      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