MachineFunctionAnalysis.cpp revision f5e16139f28d650536024280a16dcf73513baf46 
1//===-- MachineFunctionAnalysis.cpp ---------------------------------------===//
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 file contains the definitions of the MachineFunctionAnalysis members.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/CodeGen/MachineFunctionAnalysis.h"
15#include "llvm/CodeGen/MachineFunction.h"
16using namespace llvm;
17
18// Register this pass with PassInfo directly to avoid having to define
19// a default constructor.
20static PassInfo
21X("Machine Function Analysis", "machine-function-analysis",
22  intptr_t(&MachineFunctionAnalysis::ID), 0,
23  /*CFGOnly=*/false, /*is_analysis=*/true);
24
25char MachineFunctionAnalysis::ID = 0;
26
27MachineFunctionAnalysis::MachineFunctionAnalysis(TargetMachine &tm,
28                                                 CodeGenOpt::Level OL) :
29  FunctionPass(&ID), TM(tm), OptLevel(OL), MF(0) {
30}
31
32MachineFunctionAnalysis::~MachineFunctionAnalysis() {
33  releaseMemory();
34  assert(!MF && "MachineFunctionAnalysis left initialized!");
35}
36
37bool MachineFunctionAnalysis::runOnFunction(Function &F) {
38  assert(!MF && "MachineFunctionAnalysis already initialized!");
39  MF = new MachineFunction(&F, TM);
40  return false;
41}
42
43void MachineFunctionAnalysis::releaseMemory() {
44  delete MF;
45  MF = 0;
46}
47
48void MachineFunctionAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
49  AU.setPreservesAll();
50}
51