/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/include/llvm/CodeGen/EdgeBundles.h
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1 | | //===-------- EdgeBundles.h - Bundles of CFG edges --------------*- c++ -*-===// |
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 | | // The EdgeBundles analysis forms equivalence classes of CFG edges such that all |
11 | | // edges leaving a machine basic block are in the same bundle, and all edges |
12 | | // leaving a basic block are in the same bundle. |
13 | | // |
14 | | //===----------------------------------------------------------------------===// |
15 | | |
16 | | #ifndef LLVM_CODEGEN_EDGEBUNDLES_H |
17 | | #define LLVM_CODEGEN_EDGEBUNDLES_H |
18 | | |
19 | | #include "llvm/ADT/ArrayRef.h" |
20 | | #include "llvm/ADT/IntEqClasses.h" |
21 | | #include "llvm/ADT/Twine.h" |
22 | | #include "llvm/CodeGen/MachineFunctionPass.h" |
23 | | |
24 | | namespace llvm { |
25 | | |
26 | | class EdgeBundles : public MachineFunctionPass { |
27 | | const MachineFunction *MF; |
28 | | |
29 | | /// EC - Each edge bundle is an equivalence class. The keys are: |
30 | | /// 2*BB->getNumber() -> Ingoing bundle. |
31 | | /// 2*BB->getNumber()+1 -> Outgoing bundle. |
32 | | IntEqClasses EC; |
33 | | |
34 | | /// Blocks - Map each bundle to a list of basic block numbers. |
35 | | SmallVector<SmallVector<unsigned, 8>, 4> Blocks; |
36 | | |
37 | | public: |
38 | | static char ID; |
39 | 40.2k | EdgeBundles() : MachineFunctionPass(ID) {} |
40 | | |
41 | | /// getBundle - Return the ingoing (Out = false) or outgoing (Out = true) |
42 | | /// bundle number for basic block #N |
43 | 628M | unsigned getBundle(unsigned N, bool Out) const { return EC[2 * N + Out]; } |
44 | | |
45 | | /// getNumBundles - Return the total number of bundles in the CFG. |
46 | 28.7M | unsigned getNumBundles() const { return EC.getNumClasses(); } |
47 | | |
48 | | /// getBlocks - Return an array of blocks that are connected to Bundle. |
49 | 164M | ArrayRef<unsigned> getBlocks(unsigned Bundle) const { return Blocks[Bundle]; } |
50 | | |
51 | | /// getMachineFunction - Return the last machine function computed. |
52 | 0 | const MachineFunction *getMachineFunction() const { return MF; } |
53 | | |
54 | | /// view - Visualize the annotated bipartite CFG with Graphviz. |
55 | | void view() const; |
56 | | |
57 | | private: |
58 | | bool runOnMachineFunction(MachineFunction&) override; |
59 | | void getAnalysisUsage(AnalysisUsage&) const override; |
60 | | }; |
61 | | |
62 | | } // end namespace llvm |
63 | | |
64 | | #endif |