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d6bc0c7274
Summary: This allows targets to override code generation for some instructions. As an example of override, this also moves ad-hoc instruction filtering for X86 into the X86 ExegesisTarget. Reviewers: gchatelet Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D48587 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335582 91177308-0d34-0410-b5e6-96231b3b80d8
88 lines
3.1 KiB
C++
88 lines
3.1 KiB
C++
//===-- AssemblerUtils.h ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "Assembler.h"
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#include "Target.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/TargetInstrInfo.h"
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#include "llvm/CodeGen/TargetSubtargetInfo.h"
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#include "llvm/MC/MCInstBuilder.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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namespace exegesis {
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class MachineFunctionGeneratorBaseTest : public ::testing::Test {
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protected:
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MachineFunctionGeneratorBaseTest(const std::string &TT,
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const std::string &CpuName)
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: TT(TT), CpuName(CpuName),
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CanExecute(llvm::Triple(TT).getArch() ==
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llvm::Triple(llvm::sys::getProcessTriple()).getArch()) {
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if (!CanExecute) {
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llvm::outs() << "Skipping execution, host:"
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<< llvm::sys::getProcessTriple() << ", target:" << TT
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<< "\n";
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}
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}
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template <class... Bs> inline void Check(llvm::MCInst MCInst, Bs... Bytes) {
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CheckWithSetup(ExegesisTarget::getDefault(), {}, MCInst, Bytes...);
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}
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template <class... Bs>
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inline void CheckWithSetup(const ExegesisTarget &ET,
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llvm::ArrayRef<unsigned> RegsToDef,
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llvm::MCInst MCInst, Bs... Bytes) {
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ExecutableFunction Function =
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(MCInst.getOpcode() == 0) ? assembleToFunction(ET, RegsToDef, {})
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: assembleToFunction(ET, RegsToDef, {MCInst});
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ASSERT_THAT(Function.getFunctionBytes().str(),
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testing::ElementsAre(Bytes...));
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if (CanExecute)
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Function();
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}
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private:
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std::unique_ptr<llvm::LLVMTargetMachine> createTargetMachine() {
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std::string Error;
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const llvm::Target *TheTarget =
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llvm::TargetRegistry::lookupTarget(TT, Error);
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EXPECT_TRUE(TheTarget) << Error << " " << TT;
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const llvm::TargetOptions Options;
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llvm::TargetMachine *TM = TheTarget->createTargetMachine(
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TT, CpuName, "", Options, llvm::Reloc::Model::Static);
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EXPECT_TRUE(TM) << TT << " " << CpuName;
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return std::unique_ptr<llvm::LLVMTargetMachine>(
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static_cast<llvm::LLVMTargetMachine *>(TM));
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}
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ExecutableFunction
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assembleToFunction(const ExegesisTarget &ET,
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llvm::ArrayRef<unsigned> RegsToDef,
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llvm::ArrayRef<llvm::MCInst> Instructions) {
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llvm::SmallString<256> Buffer;
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llvm::raw_svector_ostream AsmStream(Buffer);
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assembleToStream(ET, createTargetMachine(), RegsToDef, Instructions,
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AsmStream);
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return ExecutableFunction(createTargetMachine(),
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getObjectFromBuffer(AsmStream.str()));
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}
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const std::string TT;
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const std::string CpuName;
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const bool CanExecute;
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};
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} // namespace exegesis
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