1 //===- Trace.cpp - Implementation of Trace class --------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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/Function.h"
20 #include "llvm/Assembly/Writer.h"
21 #include <iostream>
22 
23 using namespace llvm;
24 
25 Function *Trace::getFunction() const {
26   return getEntryBasicBlock()->getParent();
27 }
28 
29 
30 Module *Trace::getModule() const {
31   return getFunction()->getParent();
32 }
33 
34 /// print - Write trace to output stream.
35 ///
36 void Trace::print (std::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     WriteAsOperand (O, *i, true, true, getModule ());
42     O << "\n";
43   }
44   O << "; Trace parent function: \n" << *F;
45 }
46 
47 /// dump - Debugger convenience method; writes trace to standard error
48 /// output stream.
49 ///
50 void Trace::dump () const {
51   print (std::cerr);
52 }
53