1 //===--------------------- InstructionInfoView.cpp --------------*- 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 /// \file
10 ///
11 /// This file implements the InstructionInfoView API.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #include "Views/InstructionInfoView.h"
16 
17 namespace llvm {
18 namespace mca {
19 
printView(raw_ostream & OS) const20 void InstructionInfoView::printView(raw_ostream &OS) const {
21   std::string Buffer;
22   raw_string_ostream TempStream(Buffer);
23   const MCSchedModel &SM = STI.getSchedModel();
24 
25   std::string Instruction;
26   raw_string_ostream InstrStream(Instruction);
27 
28   TempStream << "\n\nInstruction Info:\n";
29   TempStream << "[1]: #uOps\n[2]: Latency\n[3]: RThroughput\n"
30              << "[4]: MayLoad\n[5]: MayStore\n[6]: HasSideEffects (U)\n\n";
31 
32   TempStream << "[1]    [2]    [3]    [4]    [5]    [6]    Instructions:\n";
33   for (const MCInst &Inst : Source) {
34     const MCInstrDesc &MCDesc = MCII.get(Inst.getOpcode());
35 
36     // Obtain the scheduling class information from the instruction.
37     unsigned SchedClassID = MCDesc.getSchedClass();
38     unsigned CPUID = SM.getProcessorID();
39 
40     // Try to solve variant scheduling classes.
41     while (SchedClassID && SM.getSchedClassDesc(SchedClassID)->isVariant())
42       SchedClassID = STI.resolveVariantSchedClass(SchedClassID, &Inst, CPUID);
43 
44     const MCSchedClassDesc &SCDesc = *SM.getSchedClassDesc(SchedClassID);
45     unsigned NumMicroOpcodes = SCDesc.NumMicroOps;
46     unsigned Latency = MCSchedModel::computeInstrLatency(STI, SCDesc);
47     Optional<double> RThroughput =
48         MCSchedModel::getReciprocalThroughput(STI, SCDesc);
49 
50     TempStream << ' ' << NumMicroOpcodes << "    ";
51     if (NumMicroOpcodes < 10)
52       TempStream << "  ";
53     else if (NumMicroOpcodes < 100)
54       TempStream << ' ';
55     TempStream << Latency << "   ";
56     if (Latency < 10)
57       TempStream << "  ";
58     else if (Latency < 100)
59       TempStream << ' ';
60 
61     if (RThroughput.hasValue()) {
62       double RT = RThroughput.getValue();
63       TempStream << format("%.2f", RT) << ' ';
64       if (RT < 10.0)
65         TempStream << "  ";
66       else if (RT < 100.0)
67         TempStream << ' ';
68     } else {
69       TempStream << " -     ";
70     }
71     TempStream << (MCDesc.mayLoad() ? " *     " : "       ");
72     TempStream << (MCDesc.mayStore() ? " *     " : "       ");
73     TempStream << (MCDesc.hasUnmodeledSideEffects() ? " U " : "   ");
74 
75     MCIP.printInst(&Inst, InstrStream, "", STI);
76     InstrStream.flush();
77 
78     // Consume any tabs or spaces at the beginning of the string.
79     StringRef Str(Instruction);
80     Str = Str.ltrim();
81     TempStream << "    " << Str << '\n';
82     Instruction = "";
83   }
84 
85   TempStream.flush();
86   OS << Buffer;
87 }
88 } // namespace mca.
89 } // namespace llvm
90