LLVM  6.0.0svn
Trace.cpp
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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/IR/BasicBlock.h"
20 #include "llvm/IR/Function.h"
21 #include "llvm/Support/Compiler.h"
22 #include "llvm/Support/Debug.h"
24 
25 using namespace llvm;
26 
28  return getEntryBasicBlock()->getParent();
29 }
30 
32  return getFunction()->getParent();
33 }
34 
35 /// print - Write trace to output stream.
36 void 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 error
49 /// output stream.
51  print(dbgs());
52 }
53 #endif
BasicBlock * getEntryBasicBlock() const
getEntryBasicBlock - Return the entry basic block (first block) of the trace.
Definition: Trace.h:44
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
#define LLVM_DUMP_METHOD
Mark debug helper function definitions like dump() that should not be stripped from debug builds...
Definition: Compiler.h:449
A Module instance is used to store all the information related to an LLVM module. ...
Definition: Module.h:63
F(f)
iterator begin()
Definition: Trace.h:86
Function * getFunction() const
getFunction - Return this trace&#39;s parent function.
Definition: Trace.cpp:27
iterator end()
Definition: Trace.h:88
void dump() const
dump - Debugger convenience method; writes trace to standard error output stream. ...
Definition: Trace.cpp:50
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:132
Module * getModule() const
getModule - Return this Module that contains this trace&#39;s parent function.
Definition: Trace.cpp:31
void print(raw_ostream &O) const
print - Write trace to output stream.
Definition: Trace.cpp:36
StringRef getName() const
Return a constant reference to the value&#39;s name.
Definition: Value.cpp:220
const Function * getParent() const
Return the enclosing method, or null if none.
Definition: BasicBlock.h:108
BasicBlockListType::const_iterator const_iterator
Definition: Trace.h:82
Module * getParent()
Get the module that this global value is contained inside of...
Definition: GlobalValue.h:556
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:44