LLVM API Documentation

 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
MachineFunctionPass.cpp
Go to the documentation of this file.
1 //===-- MachineFunctionPass.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 MachineFunctionPass members.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/IR/Function.h"
18 #include "llvm/CodeGen/Passes.h"
19 using namespace llvm;
20 
21 Pass *MachineFunctionPass::createPrinterPass(raw_ostream &O,
22  const std::string &Banner) const {
23  return createMachineFunctionPrinterPass(O, Banner);
24 }
25 
26 bool MachineFunctionPass::runOnFunction(Function &F) {
27  // Do not codegen any 'available_externally' functions at all, they have
28  // definitions outside the translation unit.
30  return false;
31 
32  MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
33  return runOnMachineFunction(MF);
34 }
35 
39 
40  // MachineFunctionPass preserves all LLVM IR passes, but there's no
41  // high-level way to express this. Instead, just list a bunch of
42  // passes explicitly. This does not include setPreservesCFG,
43  // because CodeGen overloads that to mean preserving the MachineBasicBlock
44  // CFG in addition to the LLVM IR CFG.
46  AU.addPreserved("scalar-evolution");
47  AU.addPreserved("iv-users");
48  AU.addPreserved("memdep");
49  AU.addPreserved("live-values");
50  AU.addPreserved("domtree");
51  AU.addPreserved("domfrontier");
52  AU.addPreserved("loops");
53  AU.addPreserved("lda");
54 
56 }
AnalysisUsage & addPreserved()
virtual void getAnalysisUsage(AnalysisUsage &) const
Definition: Pass.cpp:75
bool hasAvailableExternallyLinkage() const
Definition: GlobalValue.h:195
F(f)
AnalysisUsage & addRequired()
virtual bool runOnMachineFunction(MachineFunction &MF)=0
MachineFunctionPass * createMachineFunctionPrinterPass(raw_ostream &OS, const std::string &Banner="")
virtual void getAnalysisUsage(AnalysisUsage &AU) const