1 //===-- MachineFunctionPass.cpp -------------------------------------------===//
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 file contains the definitions of the MachineFunctionPass members.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/MachineFunctionPass.h"
15 #include "llvm/Analysis/AliasAnalysis.h"
16 #include "llvm/Analysis/DominanceFrontier.h"
17 #include "llvm/Analysis/IVUsers.h"
18 #include "llvm/Analysis/LoopInfo.h"
19 #include "llvm/Analysis/LoopInfo.h"
20 #include "llvm/Analysis/MemoryDependenceAnalysis.h"
21 #include "llvm/Analysis/ScalarEvolution.h"
22 #include "llvm/CodeGen/MachineFunctionAnalysis.h"
23 #include "llvm/CodeGen/Passes.h"
24 #include "llvm/CodeGen/StackProtector.h"
25 #include "llvm/IR/Dominators.h"
26 #include "llvm/IR/Function.h"
29 Pass *MachineFunctionPass::createPrinterPass(raw_ostream &O,
30 const std::string &Banner) const {
31 return createMachineFunctionPrinterPass(O, Banner);
34 bool MachineFunctionPass::runOnFunction(Function &F) {
35 // Do not codegen any 'available_externally' functions at all, they have
36 // definitions outside the translation unit.
37 if (F.hasAvailableExternallyLinkage())
40 MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
41 return runOnMachineFunction(MF);
44 void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
45 AU.addRequired<MachineFunctionAnalysis>();
46 AU.addPreserved<MachineFunctionAnalysis>();
48 // MachineFunctionPass preserves all LLVM IR passes, but there's no
49 // high-level way to express this. Instead, just list a bunch of
50 // passes explicitly. This does not include setPreservesCFG,
51 // because CodeGen overloads that to mean preserving the MachineBasicBlock
52 // CFG in addition to the LLVM IR CFG.
53 AU.addPreserved<AliasAnalysis>();
54 AU.addPreserved<DominanceFrontier>();
55 AU.addPreserved<DominatorTreeWrapperPass>();
56 AU.addPreserved<IVUsers>();
57 AU.addPreserved<LoopInfoWrapperPass>();
58 AU.addPreserved<MemoryDependenceAnalysis>();
59 AU.addPreserved<ScalarEvolution>();
60 AU.addPreserved<StackProtector>();
62 FunctionPass::getAnalysisUsage(AU);