LLVM  4.0.0svn
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/Function.h"
20 #include "llvm/Support/Debug.h"
22 using namespace llvm;
23 
25  return getEntryBasicBlock()->getParent();
26 }
27 
29  return getFunction()->getParent();
30 }
31 
32 /// print - Write trace to output stream.
33 ///
34 void Trace::print(raw_ostream &O) const {
35  Function *F = getFunction();
36  O << "; Trace from function " << F->getName() << ", blocks:\n";
37  for (const_iterator i = begin(), e = end(); i != e; ++i) {
38  O << "; ";
39  (*i)->printAsOperand(O, true, getModule());
40  O << "\n";
41  }
42  O << "; Trace parent function: \n" << *F;
43 }
44 
45 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
46 /// dump - Debugger convenience method; writes trace to standard error
47 /// output stream.
48 ///
50  print(dbgs());
51 }
52 #endif
size_t i
#define LLVM_DUMP_METHOD
Mark debug helper function definitions like dump() that should not be stripped from debug builds...
Definition: Compiler.h:450
A Module instance is used to store all the information related to an LLVM module. ...
Definition: Module.h:52
const Function * getParent() const
Return the enclosing method, or null if none.
Definition: BasicBlock.h:100
void dump() const
dump - Debugger convenience method; writes trace to standard error output stream. ...
Definition: Trace.cpp:49
StringRef getName() const
Return a constant reference to the value's name.
Definition: Value.cpp:191
iterator begin()
Definition: Trace.h:91
#define F(x, y, z)
Definition: MD5.cpp:51
iterator end()
Definition: Trace.h:93
void print(raw_ostream &O) const
print - Write trace to output stream.
Definition: Trace.cpp:34
BasicBlock * getEntryBasicBlock() const
getEntryBasicBlock - Return the entry basic block (first block) of the trace.
Definition: Trace.h:44
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:132
Function * getFunction() const
getFunction - Return this trace's parent function.
Definition: Trace.cpp:24
Module * getModule() const
getModule - Return this Module that contains this trace's parent function.
Definition: Trace.cpp:28
Module * getParent()
Get the module that this global value is contained inside of...
Definition: GlobalValue.h:537
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:44
BasicBlockListType::const_iterator const_iterator
Definition: Trace.h:87