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/Function.h"
15 #include "llvm/Analysis/AliasAnalysis.h"
16 #include "llvm/CodeGen/MachineFunctionAnalysis.h"
17 #include "llvm/CodeGen/MachineFunctionPass.h"
20 bool MachineFunctionPass::runOnFunction(Function &F) {
21 // Do not codegen any 'available_externally' functions at all, they have
22 // definitions outside the translation unit.
23 if (F.hasAvailableExternallyLinkage())
26 MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
27 return runOnMachineFunction(MF);
30 void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
31 AU.addRequired<MachineFunctionAnalysis>();
32 AU.addPreserved<MachineFunctionAnalysis>();
34 // MachineFunctionPass preserves all LLVM IR passes, but there's no
35 // high-level way to express this. Instead, just list a bunch of
36 // passes explicitly. This does not include setPreservesCFG,
37 // because CodeGen overloads that to mean preserving the MachineBasicBlock
38 // CFG in addition to the LLVM IR CFG.
39 AU.addPreserved<AliasAnalysis>();
40 AU.addPreserved("scalar-evolution");
41 AU.addPreserved("iv-users");
42 AU.addPreserved("memdep");
43 AU.addPreserved("live-values");
44 AU.addPreserved("domtree");
45 AU.addPreserved("domfrontier");
46 AU.addPreserved("loops");
47 AU.addPreserved("lda");
49 FunctionPass::getAnalysisUsage(AU);