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/Analysis/AliasAnalysis.h"
15 #include "llvm/Analysis/ScalarEvolution.h"
16 #include "llvm/Analysis/IVUsers.h"
17 #include "llvm/Analysis/LiveValues.h"
18 #include "llvm/Analysis/MemoryDependenceAnalysis.h"
19 #include "llvm/CodeGen/MachineFunctionAnalysis.h"
20 #include "llvm/CodeGen/MachineFunctionPass.h"
23 bool MachineFunctionPass::runOnFunction(Function &F) {
24 // Do not codegen any 'available_externally' functions at all, they have
25 // definitions outside the translation unit.
26 if (F.hasAvailableExternallyLinkage())
29 MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
30 return runOnMachineFunction(MF);
33 void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
34 AU.addRequired<MachineFunctionAnalysis>();
35 AU.addPreserved<MachineFunctionAnalysis>();
37 // MachineFunctionPass preserves all LLVM IR passes, but there's no
38 // high-level way to express this. Instead, just list a bunch of
40 AU.addPreserved<AliasAnalysis>();
41 AU.addPreserved<ScalarEvolution>();
42 AU.addPreserved<IVUsers>();
43 AU.addPreserved<MemoryDependenceAnalysis>();
44 AU.addPreserved<LiveValues>();
45 AU.addPreserved<DominatorTree>();
46 AU.addPreserved<DominanceFrontier>();
47 AU.addPreserved<LoopInfo>();
49 FunctionPass::getAnalysisUsage(AU);