//===--------- ExecutorAddrTest.cpp - Unit tests for ExecutorAddr ---------===//
//
// 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 "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
#include "OrcTestCommon.h"
#include "llvm/ExecutionEngine/Orc/Shared/ExecutorSymbolDef.h"

using namespace llvm;
using namespace llvm::orc;

namespace {

TEST(ExecutorAddrTest, DefaultAndNull) {
  // Check that default constructed values and isNull behave as expected.

  ExecutorAddr Default;
  ExecutorAddr Null(0);
  ExecutorAddr NonNull(1);

  EXPECT_TRUE(Null.isNull());
  EXPECT_EQ(Default, Null);

  EXPECT_FALSE(NonNull.isNull());
  EXPECT_NE(Default, NonNull);
}

TEST(ExecutorAddrTest, Ordering) {
  // Check that ordering operations.
  ExecutorAddr A1(1), A2(2);

  EXPECT_LE(A1, A1);
  EXPECT_LT(A1, A2);
  EXPECT_GT(A2, A1);
  EXPECT_GE(A2, A2);
}

TEST(ExecutorAddrTest, PtrConversion) {
  // Test toPtr / fromPtr round-tripping.
  int X = 0;
  auto XAddr = ExecutorAddr::fromPtr(&X);
  int *XPtr = XAddr.toPtr<int *>();

  EXPECT_EQ(XPtr, &X);
}

static void F() {}

TEST(ExecutorAddrTest, PtrConversionWithFunctionType) {
  // Test that function types (as opposed to function pointer types) can be
  // used with toPtr.
  auto FAddr = ExecutorAddr::fromPtr(F);
  void (*FPtr)() = FAddr.toPtr<void()>();

  EXPECT_EQ(FPtr, &F);
}

TEST(ExecutorAddrTest, WrappingAndUnwrapping) {
  constexpr uintptr_t RawAddr = 0x123456;
  int *RawPtr = (int *)RawAddr;

  constexpr uintptr_t TagOffset = 8 * (sizeof(uintptr_t) - 1);
  uintptr_t TagVal = 0xA5;
  uintptr_t TagBits = TagVal << TagOffset;
  void *TaggedPtr = (void *)((uintptr_t)RawPtr | TagBits);

  ExecutorAddr EA =
      ExecutorAddr::fromPtr(TaggedPtr, ExecutorAddr::Untag(8, TagOffset));

  EXPECT_EQ(EA.getValue(), RawAddr);

  void *ReconstitutedTaggedPtr =
      EA.toPtr<void *>(ExecutorAddr::Tag(TagVal, TagOffset));

  EXPECT_EQ(TaggedPtr, ReconstitutedTaggedPtr);
}

TEST(ExecutorAddrTest, AddrRanges) {
  ExecutorAddr A0(0), A1(1), A2(2), A3(3);
  ExecutorAddrRange R0(A0, A1), R1(A1, A2), R2(A2, A3), R3(A0, A2), R4(A1, A3);
  //     012
  // R0: #      -- Before R1
  // R1:  #     --
  // R2:   #    -- After R1
  // R3: ##     -- Overlaps R1 start
  // R4:  ##    -- Overlaps R1 end

  EXPECT_EQ(R1, ExecutorAddrRange(A1, A2));
  EXPECT_EQ(R1, ExecutorAddrRange(A1, ExecutorAddrDiff(1)));
  EXPECT_NE(R1, R2);

  EXPECT_TRUE(R1.contains(A1));
  EXPECT_FALSE(R1.contains(A0));
  EXPECT_FALSE(R1.contains(A2));

  EXPECT_FALSE(R1.overlaps(R0));
  EXPECT_FALSE(R1.overlaps(R2));
  EXPECT_TRUE(R1.overlaps(R3));
  EXPECT_TRUE(R1.overlaps(R4));

  EXPECT_LE(R0, R0);
  EXPECT_LT(R0, R1);
  EXPECT_GE(R0, R0);
  EXPECT_GT(R1, R0);
}

TEST(ExecutorSymbolDef, PointerConversion) {
  int X = 0;

  auto XHiddenSym = ExecutorSymbolDef::fromPtr(&X);
  int *XHiddenPtr = XHiddenSym.toPtr<int *>();

  auto XExportedSym = ExecutorSymbolDef::fromPtr(&X, JITSymbolFlags::Exported);
  int *XExportedPtr = XExportedSym.toPtr<int *>();

  EXPECT_EQ(XHiddenPtr, &X);
  EXPECT_EQ(XExportedPtr, &X);

  EXPECT_EQ(XHiddenSym.getFlags(), JITSymbolFlags());
  EXPECT_EQ(XExportedSym.getFlags(), JITSymbolFlags::Exported);
}

TEST(ExecutorSymbolDef, FunctionPointerConversion) {
  auto FHiddenSym = ExecutorSymbolDef::fromPtr(&F);
  void (*FHiddenPtr)() = FHiddenSym.toPtr<void()>();

  auto FExportedSym = ExecutorSymbolDef::fromPtr(&F, JITSymbolFlags::Exported);
  void (*FExportedPtr)() = FExportedSym.toPtr<void()>();

  EXPECT_EQ(FHiddenPtr, &F);
  EXPECT_EQ(FExportedPtr, &F);

  EXPECT_EQ(FHiddenSym.getFlags(), JITSymbolFlags::Callable);
  EXPECT_EQ(FExportedSym.getFlags(),
            JITSymbolFlags::Exported | JITSymbolFlags::Callable);
}

} // namespace