unittests/tools/llvm-exegesis/Common/AssemblerUtils.h

   1 //===-- AssemblerUtils.h ----------------------------------------*- 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 #ifndef LLVM_UNITTESTS_TOOLS_LLVMEXEGESIS_ASSEMBLERUTILS_H
  11 #define LLVM_UNITTESTS_TOOLS_LLVMEXEGESIS_ASSEMBLERUTILS_H
  12
  13 #include "Assembler.h"
  14 #include "BenchmarkRunner.h"
  15 #include "Target.h"
  16 #include "llvm/ADT/ArrayRef.h"
  17 #include "llvm/CodeGen/MachineInstrBuilder.h"
  18 #include "llvm/CodeGen/TargetInstrInfo.h"
  19 #include "llvm/CodeGen/TargetSubtargetInfo.h"
  20 #include "llvm/MC/MCInstBuilder.h"
  21 #include "llvm/Support/Host.h"
  22 #include "llvm/Support/TargetRegistry.h"
  23 #include "llvm/Support/TargetSelect.h"
  24 #include "gmock/gmock.h"
  25 #include "gtest/gtest.h"
  26
  27 namespace exegesis {
  28
  29 class MachineFunctionGeneratorBaseTest : public ::testing::Test {
  30 protected:
  31   MachineFunctionGeneratorBaseTest(const std::string &TT,
  32                                    const std::string &CpuName)
  33       : TT(TT), CpuName(CpuName),
  34         CanExecute(llvm::Triple(TT).getArch() ==
  35                    llvm::Triple(llvm::sys::getProcessTriple()).getArch()),
  36         ET(ExegesisTarget::lookup(llvm::Triple(TT))) {
  37     assert(ET);
  38     if (!CanExecute) {
  39       llvm::outs() << "Skipping execution, host:"
  40                    << llvm::sys::getProcessTriple() << ", target:" << TT
  41                    << "\n";
  42     }
  43   }
  44
  45   template <class... Bs>
  46   inline void Check(llvm::ArrayRef<RegisterValue> RegisterInitialValues,
  47                     llvm::MCInst MCInst, Bs... Bytes) {
  48     ExecutableFunction Function =
  49         (MCInst.getOpcode() == 0)
  50             ? assembleToFunction(RegisterInitialValues, {})
  51             : assembleToFunction(RegisterInitialValues, {MCInst});
  52     ASSERT_THAT(Function.getFunctionBytes().str(),
  53                 testing::ElementsAre(Bytes...));
  54     if (CanExecute) {
  55       BenchmarkRunner::ScratchSpace Scratch;
  56       Function(Scratch.ptr());
  57     }
  58   }
  59
  60 private:
  61   std::unique_ptr<llvm::LLVMTargetMachine> createTargetMachine() {
  62     std::string Error;
  63     const llvm::Target *TheTarget =
  64         llvm::TargetRegistry::lookupTarget(TT, Error);
  65     EXPECT_TRUE(TheTarget) << Error << " " << TT;
  66     const llvm::TargetOptions Options;
  67     llvm::TargetMachine *TM = TheTarget->createTargetMachine(
  68         TT, CpuName, "", Options, llvm::Reloc::Model::Static);
  69     EXPECT_TRUE(TM) << TT << " " << CpuName;
  70     return std::unique_ptr<llvm::LLVMTargetMachine>(
  71         static_cast<llvm::LLVMTargetMachine *>(TM));
  72   }
  73
  74   ExecutableFunction
  75   assembleToFunction(llvm::ArrayRef<RegisterValue> RegisterInitialValues,
  76                      llvm::ArrayRef<llvm::MCInst> Instructions) {
  77     llvm::SmallString<256> Buffer;
  78     llvm::raw_svector_ostream AsmStream(Buffer);
  79     assembleToStream(*ET, createTargetMachine(), /*LiveIns=*/{},
  80                      RegisterInitialValues, Instructions, AsmStream);
  81     return ExecutableFunction(createTargetMachine(),
  82                               getObjectFromBuffer(AsmStream.str()));
  83   }
  84
  85   const std::string TT;
  86   const std::string CpuName;
  87   const bool CanExecute;
  88   const ExegesisTarget *const ET;
  89 };
  90
  91 } // namespace exegesis
  92
  93 #endif