1 //===---- Canonicalization.cpp - Run canonicalization passes --------------===//
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 // Run the set of default canonicalization passes.
11 //
12 // This pass is mainly used for debugging.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #include "polly/Canonicalization.h"
17 #include "polly/LinkAllPasses.h"
18 #include "polly/Options.h"
19 #include "llvm/Transforms/IPO.h"
20 #include "llvm/Transforms/Scalar.h"
21 
22 using namespace llvm;
23 using namespace polly;
24 
25 static cl::opt<bool>
26     PollyInliner("polly-run-inliner",
27                  cl::desc("Run an early inliner pass before Polly"), cl::Hidden,
28                  cl::init(false), cl::ZeroOrMore, cl::cat(PollyCategory));
29 
30 void polly::registerCanonicalicationPasses(llvm::legacy::PassManagerBase &PM) {
31   bool UseMemSSA = true;
32   PM.add(polly::createRewriteByrefParamsPass());
33   PM.add(llvm::createPromoteMemoryToRegisterPass());
34   PM.add(llvm::createEarlyCSEPass(UseMemSSA));
35   PM.add(llvm::createInstructionCombiningPass());
36   PM.add(llvm::createCFGSimplificationPass());
37   PM.add(llvm::createTailCallEliminationPass());
38   PM.add(llvm::createCFGSimplificationPass());
39   PM.add(llvm::createReassociatePass());
40   PM.add(llvm::createLoopRotatePass());
41   if (PollyInliner) {
42     PM.add(llvm::createFunctionInliningPass(200));
43     PM.add(llvm::createPromoteMemoryToRegisterPass());
44     PM.add(llvm::createCFGSimplificationPass());
45     PM.add(llvm::createInstructionCombiningPass());
46     PM.add(createBarrierNoopPass());
47   }
48   PM.add(llvm::createInstructionCombiningPass());
49   PM.add(llvm::createIndVarSimplifyPass());
50   PM.add(polly::createCodePreparationPass());
51 }
52 
53 namespace {
54 class PollyCanonicalize : public ModulePass {
55   PollyCanonicalize(const PollyCanonicalize &) = delete;
56   const PollyCanonicalize &operator=(const PollyCanonicalize &) = delete;
57 
58 public:
59   static char ID;
60 
61   explicit PollyCanonicalize() : ModulePass(ID) {}
62   ~PollyCanonicalize();
63 
64   /// @name FunctionPass interface.
65   //@{
66   virtual void getAnalysisUsage(AnalysisUsage &AU) const;
67   virtual void releaseMemory();
68   virtual bool runOnModule(Module &M);
69   virtual void print(raw_ostream &OS, const Module *) const;
70   //@}
71 };
72 } // namespace
73 
74 PollyCanonicalize::~PollyCanonicalize() {}
75 
76 void PollyCanonicalize::getAnalysisUsage(AnalysisUsage &AU) const {}
77 
78 void PollyCanonicalize::releaseMemory() {}
79 
80 bool PollyCanonicalize::runOnModule(Module &M) {
81   legacy::PassManager PM;
82   registerCanonicalicationPasses(PM);
83   PM.run(M);
84 
85   return true;
86 }
87 
88 void PollyCanonicalize::print(raw_ostream &OS, const Module *) const {}
89 
90 char PollyCanonicalize::ID = 0;
91 
92 Pass *polly::createPollyCanonicalizePass() { return new PollyCanonicalize(); }
93 
94 INITIALIZE_PASS_BEGIN(PollyCanonicalize, "polly-canonicalize",
95                       "Polly - Run canonicalization passes", false, false)
96 INITIALIZE_PASS_END(PollyCanonicalize, "polly-canonicalize",
97                     "Polly - Run canonicalization passes", false, false)
98