// Copyright (c) 2017 Pierre Moreau
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <string>

#include "gmock/gmock.h"
#include "test/link/linker_fixture.h"

namespace spvtools {
namespace {

using ::testing::HasSubstr;
using MatchingImportsToExports = spvtest::LinkerTest;

TEST_F(MatchingImportsToExports, Default) {
  const std::string body1 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
%3 = OpVariable %2 Input
)";
  const std::string body2 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%3 = OpConstant %2 42
%1 = OpVariable %2 Uniform %3
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_SUCCESS, AssembleAndLink({body1, body2}, &linked_binary))
      << GetErrorMessage();

  const std::string expected_res =
      R"(OpModuleProcessed "Linked by SPIR-V Tools Linker"
%1 = OpTypeFloat 32
%2 = OpVariable %1 Input
%3 = OpConstant %1 42
%4 = OpVariable %1 Uniform %3
)";
  std::string res_body;
  SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER);
  EXPECT_EQ(SPV_SUCCESS, Disassemble(linked_binary, &res_body))
      << GetErrorMessage();
  EXPECT_EQ(expected_res, res_body);
}

TEST_F(MatchingImportsToExports, NotALibraryExtraExports) {
  const std::string body = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_SUCCESS, AssembleAndLink({body}, &linked_binary))
      << GetErrorMessage();

  const std::string expected_res =
      R"(OpModuleProcessed "Linked by SPIR-V Tools Linker"
%1 = OpTypeFloat 32
%2 = OpVariable %1 Uniform
)";
  std::string res_body;
  SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER);
  EXPECT_EQ(SPV_SUCCESS, Disassemble(linked_binary, &res_body))
      << GetErrorMessage();
  EXPECT_EQ(expected_res, res_body);
}

TEST_F(MatchingImportsToExports, LibraryExtraExports) {
  const std::string body = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
)";

  spvtest::Binary linked_binary;
  LinkerOptions options;
  options.SetCreateLibrary(true);
  EXPECT_EQ(SPV_SUCCESS, AssembleAndLink({body}, &linked_binary, options))
      << GetErrorMessage();

  const std::string expected_res = R"(OpCapability Linkage
OpModuleProcessed "Linked by SPIR-V Tools Linker"
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
)";
  std::string res_body;
  SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER);
  EXPECT_EQ(SPV_SUCCESS, Disassemble(linked_binary, &res_body))
      << GetErrorMessage();
  EXPECT_EQ(expected_res, res_body);
}

TEST_F(MatchingImportsToExports, UnresolvedImports) {
  const std::string body1 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
)";
  const std::string body2 = R"()";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_ERROR_INVALID_BINARY,
            AssembleAndLink({body1, body2}, &linked_binary));
  EXPECT_THAT(GetErrorMessage(),
              HasSubstr("Unresolved external reference to \"foo\"."));
}

TEST_F(MatchingImportsToExports, TypeMismatch) {
  const std::string body1 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
%3 = OpVariable %2 Input
)";
  const std::string body2 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeInt 32 0
%3 = OpConstant %2 42
%1 = OpVariable %2 Uniform %3
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_ERROR_INVALID_BINARY,
            AssembleAndLink({body1, body2}, &linked_binary))
      << GetErrorMessage();
  EXPECT_THAT(
      GetErrorMessage(),
      HasSubstr("Type mismatch on symbol \"foo\" between imported "
                "variable/function %1 and exported variable/function %4"));
}

TEST_F(MatchingImportsToExports, MultipleDefinitions) {
  const std::string body1 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
%3 = OpVariable %2 Input
)";
  const std::string body2 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%3 = OpConstant %2 42
%1 = OpVariable %2 Uniform %3
)";
  const std::string body3 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%3 = OpConstant %2 -1
%1 = OpVariable %2 Uniform %3
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_ERROR_INVALID_BINARY,
            AssembleAndLink({body1, body2, body3}, &linked_binary))
      << GetErrorMessage();
  EXPECT_THAT(GetErrorMessage(),
              HasSubstr("Too many external references, 2, were found "
                        "for \"foo\"."));
}

TEST_F(MatchingImportsToExports, SameNameDifferentTypes) {
  const std::string body1 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
%3 = OpVariable %2 Input
)";
  const std::string body2 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeInt 32 0
%3 = OpConstant %2 42
%1 = OpVariable %2 Uniform %3
)";
  const std::string body3 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%3 = OpConstant %2 12
%1 = OpVariable %2 Uniform %3
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_ERROR_INVALID_BINARY,
            AssembleAndLink({body1, body2, body3}, &linked_binary))
      << GetErrorMessage();
  EXPECT_THAT(GetErrorMessage(),
              HasSubstr("Too many external references, 2, were found "
                        "for \"foo\"."));
}

TEST_F(MatchingImportsToExports, DecorationMismatch) {
  const std::string body1 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
OpDecorate %2 Constant
%2 = OpTypeFloat 32
%1 = OpVariable %2 Uniform
%3 = OpVariable %2 Input
)";
  const std::string body2 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeFloat 32
%3 = OpConstant %2 42
%1 = OpVariable %2 Uniform %3
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_ERROR_INVALID_BINARY,
            AssembleAndLink({body1, body2}, &linked_binary))
      << GetErrorMessage();
  EXPECT_THAT(
      GetErrorMessage(),
      HasSubstr("Type mismatch on symbol \"foo\" between imported "
                "variable/function %1 and exported variable/function %4"));
}

TEST_F(MatchingImportsToExports,
       FuncParamAttrDifferButStillMatchExportToImport) {
  const std::string body1 = R"(
OpCapability Kernel
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
OpDecorate %2 FuncParamAttr Zext
%3 = OpTypeVoid
%4 = OpTypeInt 32 0
%5 = OpTypeFunction %3 %4
%1 = OpFunction %3 None %5
%2 = OpFunctionParameter %4
OpFunctionEnd
)";
  const std::string body2 = R"(
OpCapability Kernel
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
OpDecorate %2 FuncParamAttr Sext
%3 = OpTypeVoid
%4 = OpTypeInt 32 0
%5 = OpTypeFunction %3 %4
%1 = OpFunction %3 None %5
%2 = OpFunctionParameter %4
%6 = OpLabel
OpReturn
OpFunctionEnd
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_SUCCESS, AssembleAndLink({body1, body2}, &linked_binary))
      << GetErrorMessage();

  const std::string expected_res = R"(OpCapability Kernel
OpModuleProcessed "Linked by SPIR-V Tools Linker"
OpDecorate %1 FuncParamAttr Sext
%2 = OpTypeVoid
%3 = OpTypeInt 32 0
%4 = OpTypeFunction %2 %3
%5 = OpFunction %2 None %4
%1 = OpFunctionParameter %3
%6 = OpLabel
OpReturn
OpFunctionEnd
)";
  std::string res_body;
  SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER);
  EXPECT_EQ(SPV_SUCCESS, Disassemble(linked_binary, &res_body))
      << GetErrorMessage();
  EXPECT_EQ(expected_res, res_body);
}

TEST_F(MatchingImportsToExports, FunctionCtrl) {
  const std::string body1 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%4 = OpTypeFloat 32
%5 = OpVariable %4 Uniform
%1 = OpFunction %2 None %3
OpFunctionEnd
)";
  const std::string body2 = R"(
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%1 = OpFunction %2 Inline %3
%4 = OpLabel
OpReturn
OpFunctionEnd
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_SUCCESS, AssembleAndLink({body1, body2}, &linked_binary))
      << GetErrorMessage();

  const std::string expected_res =
      R"(OpModuleProcessed "Linked by SPIR-V Tools Linker"
%1 = OpTypeVoid
%2 = OpTypeFunction %1
%3 = OpTypeFloat 32
%4 = OpVariable %3 Uniform
%5 = OpFunction %1 Inline %2
%6 = OpLabel
OpReturn
OpFunctionEnd
)";
  std::string res_body;
  SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER);
  EXPECT_EQ(SPV_SUCCESS, Disassemble(linked_binary, &res_body))
      << GetErrorMessage();
  EXPECT_EQ(expected_res, res_body);
}

TEST_F(MatchingImportsToExports, UseExportedFuncParamAttr) {
  const std::string body1 = R"(
OpCapability Kernel
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Import
OpDecorate %2 FuncParamAttr Zext
%2 = OpDecorationGroup
OpGroupDecorate %2 %3 %4
%5 = OpTypeVoid
%6 = OpTypeInt 32 0
%7 = OpTypeFunction %5 %6
%1 = OpFunction %5 None %7
%3 = OpFunctionParameter %6
OpFunctionEnd
%8 = OpFunction %5 None %7
%4 = OpFunctionParameter %6
OpFunctionEnd
)";
  const std::string body2 = R"(
OpCapability Kernel
OpCapability Linkage
OpDecorate %1 LinkageAttributes "foo" Export
OpDecorate %2 FuncParamAttr Sext
%3 = OpTypeVoid
%4 = OpTypeInt 32 0
%5 = OpTypeFunction %3 %4
%1 = OpFunction %3 None %5
%2 = OpFunctionParameter %4
%6 = OpLabel
OpReturn
OpFunctionEnd
)";

  spvtest::Binary linked_binary;
  EXPECT_EQ(SPV_SUCCESS, AssembleAndLink({body1, body2}, &linked_binary))
      << GetErrorMessage();

  const std::string expected_res = R"(OpCapability Kernel
OpModuleProcessed "Linked by SPIR-V Tools Linker"
OpDecorate %1 FuncParamAttr Zext
%1 = OpDecorationGroup
OpGroupDecorate %1 %2
OpDecorate %3 FuncParamAttr Sext
%4 = OpTypeVoid
%5 = OpTypeInt 32 0
%6 = OpTypeFunction %4 %5
%7 = OpFunction %4 None %6
%2 = OpFunctionParameter %5
OpFunctionEnd
%8 = OpFunction %4 None %6
%3 = OpFunctionParameter %5
%9 = OpLabel
OpReturn
OpFunctionEnd
)";
  std::string res_body;
  SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER);
  EXPECT_EQ(SPV_SUCCESS, Disassemble(linked_binary, &res_body))
      << GetErrorMessage();
  EXPECT_EQ(expected_res, res_body);
}

}  // namespace
}  // namespace spvtools