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//===-- SnippetGeneratorTest.cpp --------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "../Common/AssemblerUtils.h"
#include "LlvmState.h"
#include "MCInstrDescView.h"
#include "PPCInstrInfo.h"
#include "ParallelSnippetGenerator.h"
#include "RegisterAliasing.h"
#include "SerialSnippetGenerator.h"
#include "TestBase.h"
#include <unordered_set>
namespace llvm {
namespace exegesis {
namespace {
using testing::AnyOf;
using testing::ElementsAre;
using testing::HasSubstr;
using testing::SizeIs;
MATCHER(IsInvalid, "") { return !arg.isValid(); }
MATCHER(IsReg, "") { return arg.isReg(); }
template <typename SnippetGeneratorT>
class PPCSnippetGeneratorTest : public PPCTestBase {
protected:
PPCSnippetGeneratorTest() : Generator(State, SnippetGenerator::Options()) {}
std::vector<CodeTemplate> checkAndGetCodeTemplates(unsigned Opcode) {
randomGenerator().seed(0); // Initialize seed.
const Instruction &Instr = State.getIC().getInstr(Opcode);
auto CodeTemplateOrError = Generator.generateCodeTemplates(
&Instr, State.getRATC().emptyRegisters());
EXPECT_FALSE(CodeTemplateOrError.takeError()); // Valid configuration.
return std::move(CodeTemplateOrError.get());
}
SnippetGeneratorT Generator;
};
using PPCSerialSnippetGeneratorTest = PPCSnippetGeneratorTest<SerialSnippetGenerator>;
using PPCParallelSnippetGeneratorTest =
PPCSnippetGeneratorTest<ParallelSnippetGenerator>;
TEST_F(PPCSerialSnippetGeneratorTest, ImplicitSelfDependencyThroughExplicitRegs) {
// - ADD8
// - Op0 Explicit Def RegClass(G8RC)
// - Op1 Explicit Use RegClass(G8RC)
// - Op2 Explicit Use RegClass(G8RC)
// - Var0 [Op0]
// - Var1 [Op1]
// - Var2 [Op2]
// - hasAliasingRegisters
const unsigned Opcode = PPC::ADD8;
const auto CodeTemplates = checkAndGetCodeTemplates(Opcode);
ASSERT_THAT(CodeTemplates, SizeIs(1));
const auto &CT = CodeTemplates[0];
EXPECT_THAT(CT.Execution, ExecutionMode::SERIAL_VIA_EXPLICIT_REGS);
ASSERT_THAT(CT.Instructions, SizeIs(1));
const InstructionTemplate &IT = CT.Instructions[0];
EXPECT_THAT(IT.getOpcode(), Opcode);
ASSERT_THAT(IT.getVariableValues(), SizeIs(3));
EXPECT_THAT(IT.getVariableValues(),
AnyOf(ElementsAre(IsReg(), IsInvalid(), IsReg()),
ElementsAre(IsReg(), IsReg(), IsInvalid())))
<< "Op0 is either set to Op1 or to Op2";
}
TEST_F(PPCSerialSnippetGeneratorTest, ImplicitSelfDependencyThroughTiedRegs) {
// - RLDIMI
// - Op0 Explicit Def RegClass(G8RC)
// - Op1 Explicit Use RegClass(G8RC) TiedToOp0
// - Op2 Explicit Use RegClass(G8RC)
// - Op3 Explicit Use Immediate
// - Op4 Explicit Use Immediate
// - Var0 [Op0,Op1]
// - Var1 [Op2]
// - Var2 [Op3]
// - Var3 [Op4]
// - hasTiedRegisters (execution is always serial)
// - hasAliasingRegisters
// - RLDIMI
const unsigned Opcode = PPC::RLDIMI;
const auto CodeTemplates = checkAndGetCodeTemplates(Opcode);
ASSERT_THAT(CodeTemplates, SizeIs(1));
const auto &CT = CodeTemplates[0];
EXPECT_THAT(CT.Execution, ExecutionMode::ALWAYS_SERIAL_TIED_REGS_ALIAS);
ASSERT_THAT(CT.Instructions, SizeIs(1));
const InstructionTemplate &IT = CT.Instructions[0];
EXPECT_THAT(IT.getOpcode(), Opcode);
ASSERT_THAT(IT.getVariableValues(), SizeIs(4));
EXPECT_THAT(IT.getVariableValues()[2], IsInvalid()) << "Operand 1 is not set";
EXPECT_THAT(IT.getVariableValues()[3], IsInvalid()) << "Operand 2 is not set";
}
TEST_F(PPCParallelSnippetGeneratorTest, MemoryUse) {
// - LDX
// - Op0 Explicit Def RegClass(G8RC)
// - Op1 Explicit Use Memory RegClass(GPRC)
// - Op2 Explicit Use Memory RegClass(VSSRC)
// - Var0 [Op0]
// - Var1 [Op1]
// - Var2 [Op2]
// - hasMemoryOperands
// - hasAliasingRegisters
const unsigned Opcode = PPC::LDX;
const auto CodeTemplates = checkAndGetCodeTemplates(Opcode);
ASSERT_THAT(CodeTemplates, SizeIs(1));
const auto &CT = CodeTemplates[0];
EXPECT_THAT(CT.Info, HasSubstr("instruction has no tied variables picking "
"Uses different from defs"));
EXPECT_THAT(CT.Execution, ExecutionMode::UNKNOWN);
ASSERT_THAT(CT.Instructions,
SizeIs(ParallelSnippetGenerator::kMinNumDifferentAddresses));
const InstructionTemplate &IT = CT.Instructions[0];
EXPECT_THAT(IT.getOpcode(), Opcode);
ASSERT_THAT(IT.getVariableValues(), SizeIs(3));
EXPECT_EQ(IT.getVariableValues()[1].getReg(), PPC::X1);
EXPECT_EQ(IT.getVariableValues()[2].getReg(), PPC::X13);
}
} // namespace
} // namespace exegesis
} // namespace llvm
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