1 //===- Trace.cpp - Implementation of Trace class --------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
16 //===----------------------------------------------------------------------===//
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"
23 #include "llvm/Support/raw_ostream.h"
27 Function *Trace::getFunction() const {
28 return getEntryBasicBlock()->getParent();
31 Module *Trace::getModule() const {
32 return getFunction()->getParent();
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) {
41 (*i)->printAsOperand(O, true, getModule());
44 O << "; Trace parent function: \n" << *F;
47 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
48 /// dump - Debugger convenience method; writes trace to standard error
50 LLVM_DUMP_METHOD void Trace::dump() const {