Sink DwarfUnit::SectionSym into DwarfCompileUnit as it's only needed/used there.
[oota-llvm.git] / lib / CodeGen / MachineFunctionPass.cpp
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"
15 #include "llvm/Analysis/AliasAnalysis.h"
16 #include "llvm/CodeGen/MachineFunctionAnalysis.h"
17 #include "llvm/CodeGen/MachineFunctionPass.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.
29   if (F.hasAvailableExternallyLinkage())
30     return false;
31
32   MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
33   return runOnMachineFunction(MF);
34 }
35
36 void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
37   AU.addRequired<MachineFunctionAnalysis>();
38   AU.addPreserved<MachineFunctionAnalysis>();
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.
45   AU.addPreserved<AliasAnalysis>();
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   AU.addPreserved("stack-protector");
55
56   FunctionPass::getAnalysisUsage(AU);
57 }