LLVM  8.0.0svn
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/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"
25 
26 using namespace llvm;
27 
29  return getEntryBasicBlock()->getParent();
30 }
31 
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.
52  print(dbgs());
53 }
54 #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
A Module instance is used to store all the information related to an LLVM module. ...
Definition: Module.h:64
F(f)
iterator begin()
Definition: Trace.h:86
#define LLVM_DUMP_METHOD
Definition: Compiler.h:74
Function * getFunction() const
getFunction - Return this trace&#39;s parent function.
Definition: Trace.cpp:28
iterator end()
Definition: Trace.h:88
void dump() const
dump - Debugger convenience method; writes trace to standard error output stream. ...
Definition: Trace.cpp:51
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:133
Module * getModule() const
getModule - Return this Module that contains this trace&#39;s parent function.
Definition: Trace.cpp:32
void print(raw_ostream &O) const
print - Write trace to output stream.
Definition: Trace.cpp:37
StringRef getName() const
Return a constant reference to the value&#39;s name.
Definition: Value.cpp:224
const Function * getParent() const
Return the enclosing method, or null if none.
Definition: BasicBlock.h:107
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:566
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:46