1 //===--------------------- InstructionInfoView.h ----------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 ///
10 /// This file implements the instruction info view.
11 ///
12 /// The goal fo the instruction info view is to print the latency and reciprocal
13 /// throughput information for every instruction in the input sequence.
14 /// This section also reports extra information related to the number of micro
15 /// opcodes, and opcode properties (i.e. 'MayLoad', 'MayStore', 'HasSideEffects)
16 ///
17 /// Example:
18 ///
19 /// Instruction Info:
20 /// [1]: #uOps
21 /// [2]: Latency
22 /// [3]: RThroughput
23 /// [4]: MayLoad
24 /// [5]: MayStore
25 /// [6]: HasSideEffects
26 ///
27 /// [1]    [2]    [3]    [4]    [5]    [6]	Instructions:
28 ///  1      2     1.00                    	vmulps	%xmm0, %xmm1, %xmm2
29 ///  1      3     1.00                    	vhaddps	%xmm2, %xmm2, %xmm3
30 ///  1      3     1.00                    	vhaddps	%xmm3, %xmm3, %xmm4
31 //
32 //===----------------------------------------------------------------------===//
33 
34 #ifndef LLVM_TOOLS_LLVM_MCA_INSTRUCTIONINFOVIEW_H
35 #define LLVM_TOOLS_LLVM_MCA_INSTRUCTIONINFOVIEW_H
36 
37 #include "Views/InstructionView.h"
38 #include "llvm/ADT/ArrayRef.h"
39 #include "llvm/ADT/SmallVector.h"
40 #include "llvm/MC/MCInst.h"
41 #include "llvm/MC/MCInstPrinter.h"
42 #include "llvm/MC/MCInstrInfo.h"
43 #include "llvm/MC/MCSubtargetInfo.h"
44 #include "llvm/MCA/CodeEmitter.h"
45 #include "llvm/Support/raw_ostream.h"
46 
47 #define DEBUG_TYPE "llvm-mca"
48 
49 namespace llvm {
50 namespace mca {
51 
52 /// A view that prints out generic instruction information.
53 class InstructionInfoView : public InstructionView {
54   const llvm::MCInstrInfo &MCII;
55   CodeEmitter &CE;
56   bool PrintEncodings;
57   bool PrintBarriers;
58   using UniqueInst = std::unique_ptr<Instruction>;
59   ArrayRef<UniqueInst> LoweredInsts;
60 
61   struct InstructionInfoViewData {
62     unsigned NumMicroOpcodes = 0;
63     unsigned Latency = 0;
64     std::optional<double> RThroughput = 0.0;
65     bool mayLoad = false;
66     bool mayStore = false;
67     bool hasUnmodeledSideEffects = false;
68   };
69   using IIVDVec = SmallVector<InstructionInfoViewData, 16>;
70 
71   /// Place the data into the array of InstructionInfoViewData IIVD.
72   void collectData(MutableArrayRef<InstructionInfoViewData> IIVD) const;
73 
74 public:
75   InstructionInfoView(const llvm::MCSubtargetInfo &ST,
76                       const llvm::MCInstrInfo &II, CodeEmitter &C,
77                       bool ShouldPrintEncodings, llvm::ArrayRef<llvm::MCInst> S,
78                       llvm::MCInstPrinter &IP,
79                       ArrayRef<UniqueInst> LoweredInsts,
80                       bool ShouldPrintBarriers)
81       : InstructionView(ST, IP, S), MCII(II), CE(C),
82         PrintEncodings(ShouldPrintEncodings),
83         PrintBarriers(ShouldPrintBarriers), LoweredInsts(LoweredInsts) {}
84 
85   void printView(llvm::raw_ostream &OS) const override;
86   StringRef getNameAsString() const override { return "InstructionInfoView"; }
87   json::Value toJSON() const override;
88   json::Object toJSON(const InstructionInfoViewData &IIVD) const;
89 };
90 } // namespace mca
91 } // namespace llvm
92 
93 #endif
94