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      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   assert(Target->Next == nullptr && "target has already been registered");
     34   if (Target->Next != nullptr)
     35     return;
     36   Target->Next = FirstTarget;
     37   FirstTarget = Target;
     38 }
     39 
     40 std::unique_ptr<BenchmarkRunner>
     41 ExegesisTarget::createBenchmarkRunner(InstructionBenchmark::ModeE Mode,
     42                                       const LLVMState &State) const {
     43   switch (Mode) {
     44   case InstructionBenchmark::Unknown:
     45     return nullptr;
     46   case InstructionBenchmark::Latency:
     47     return createLatencyBenchmarkRunner(State);
     48   case InstructionBenchmark::Uops:
     49     return createUopsBenchmarkRunner(State);
     50   }
     51   return nullptr;
     52 }
     53 
     54 std::unique_ptr<BenchmarkRunner>
     55 ExegesisTarget::createLatencyBenchmarkRunner(const LLVMState &State) const {
     56   return llvm::make_unique<LatencyBenchmarkRunner>(State);
     57 }
     58 
     59 std::unique_ptr<BenchmarkRunner>
     60 ExegesisTarget::createUopsBenchmarkRunner(const LLVMState &State) const {
     61   return llvm::make_unique<UopsBenchmarkRunner>(State);
     62 }
     63 
     64 namespace {
     65 
     66 // Default implementation.
     67 class ExegesisDefaultTarget : public ExegesisTarget {
     68 private:
     69   bool matchesArch(llvm::Triple::ArchType Arch) const override {
     70     llvm_unreachable("never called");
     71     return false;
     72   }
     73 };
     74 
     75 } // namespace
     76 
     77 const ExegesisTarget &ExegesisTarget::getDefault() {
     78   static ExegesisDefaultTarget Target;
     79   return Target;
     80 }
     81 
     82 } // namespace exegesis
     83