1 //===-- Target.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 #include "Target.h"
10 
11 #include "Latency.h"
12 #include "Uops.h"
13 
14 namespace exegesis {
15 
16 ExegesisTarget::~ExegesisTarget() {} // anchor.
17 
18 static ExegesisTarget *FirstTarget = nullptr;
19 
20 const ExegesisTarget *ExegesisTarget::lookup(llvm::Triple TT) {
21   for (const ExegesisTarget *T = FirstTarget; T != nullptr; T = T->Next) {
22     if (T->matchesArch(TT.getArch()))
23       return T;
24   }
25   return nullptr;
26 }
27 
28 void ExegesisTarget::registerTarget(ExegesisTarget *Target) {
29   if (FirstTarget == nullptr) {
30     FirstTarget = Target;
31     return;
32   }
33   if (Target->Next != nullptr)
34     return; // Already registered.
35   Target->Next = FirstTarget;
36   FirstTarget = Target;
37 }
38 
39 std::unique_ptr<BenchmarkRunner>
40 ExegesisTarget::createBenchmarkRunner(InstructionBenchmark::ModeE Mode,
41                                       const LLVMState &State) const {
42   switch (Mode) {
43   case InstructionBenchmark::Unknown:
44     return nullptr;
45   case InstructionBenchmark::Latency:
46     return createLatencyBenchmarkRunner(State);
47   case InstructionBenchmark::Uops:
48     return createUopsBenchmarkRunner(State);
49   }
50   return nullptr;
51 }
52 
53 std::unique_ptr<BenchmarkRunner>
54 ExegesisTarget::createLatencyBenchmarkRunner(const LLVMState &State) const {
55   return llvm::make_unique<LatencyBenchmarkRunner>(State);
56 }
57 
58 std::unique_ptr<BenchmarkRunner>
59 ExegesisTarget::createUopsBenchmarkRunner(const LLVMState &State) const {
60   return llvm::make_unique<UopsBenchmarkRunner>(State);
61 }
62 
63 namespace {
64 
65 // Default implementation.
66 class ExegesisDefaultTarget : public ExegesisTarget {
67 private:
68   bool matchesArch(llvm::Triple::ArchType Arch) const override {
69     llvm_unreachable("never called");
70     return false;
71   }
72 };
73 
74 } // namespace
75 
76 const ExegesisTarget &ExegesisTarget::getDefault() {
77   static ExegesisDefaultTarget Target;
78   return Target;
79 }
80 
81 } // namespace exegesis
82