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//===- ValueMapper.cpp - Unit tests for ValueMapper -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Metadata.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(ValueMapperTest, MapMetadata) {
LLVMContext Context;
auto *U = MDTuple::get(Context, None);
// The node should be unchanged.
ValueToValueMapTy VM;
EXPECT_EQ(U, MapMetadata(U, VM, RF_None));
}
TEST(ValueMapperTest, MapMetadataCycle) {
LLVMContext Context;
MDNode *U0;
MDNode *U1;
{
Metadata *Ops[] = {nullptr};
auto T = MDTuple::getTemporary(Context, Ops);
Ops[0] = T.get();
U0 = MDTuple::get(Context, Ops);
T->replaceOperandWith(0, U0);
U1 = MDNode::replaceWithUniqued(std::move(T));
U0->resolveCycles();
}
EXPECT_TRUE(U0->isResolved());
EXPECT_TRUE(U0->isUniqued());
EXPECT_TRUE(U1->isResolved());
EXPECT_TRUE(U1->isUniqued());
EXPECT_EQ(U1, U0->getOperand(0));
EXPECT_EQ(U0, U1->getOperand(0));
// Cycles shouldn't be duplicated.
{
ValueToValueMapTy VM;
EXPECT_EQ(U0, MapMetadata(U0, VM, RF_None));
EXPECT_EQ(U1, MapMetadata(U1, VM, RF_None));
}
// Check the other order.
{
ValueToValueMapTy VM;
EXPECT_EQ(U1, MapMetadata(U1, VM, RF_None));
EXPECT_EQ(U0, MapMetadata(U0, VM, RF_None));
}
}
TEST(ValueMapperTest, MapMetadataUnresolved) {
LLVMContext Context;
TempMDTuple T = MDTuple::getTemporary(Context, None);
ValueToValueMapTy VM;
EXPECT_EQ(T.get(), MapMetadata(T.get(), VM, RF_NoModuleLevelChanges));
}
TEST(ValueMapperTest, MapMetadataDistinct) {
LLVMContext Context;
auto *D = MDTuple::getDistinct(Context, None);
{
// The node should be cloned.
ValueToValueMapTy VM;
EXPECT_NE(D, MapMetadata(D, VM, RF_None));
}
{
// The node should be moved.
ValueToValueMapTy VM;
EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
}
}
TEST(ValueMapperTest, MapMetadataDistinctOperands) {
LLVMContext Context;
Metadata *Old = MDTuple::getDistinct(Context, None);
auto *D = MDTuple::getDistinct(Context, Old);
ASSERT_EQ(Old, D->getOperand(0));
Metadata *New = MDTuple::getDistinct(Context, None);
ValueToValueMapTy VM;
VM.MD()[Old].reset(New);
// Make sure operands are updated.
EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
EXPECT_EQ(New, D->getOperand(0));
}
TEST(ValueMapperTest, MapMetadataSeeded) {
LLVMContext Context;
auto *D = MDTuple::getDistinct(Context, None);
// The node should be moved.
ValueToValueMapTy VM;
EXPECT_EQ(None, VM.getMappedMD(D));
VM.MD().insert(std::make_pair(D, TrackingMDRef(D)));
EXPECT_EQ(D, *VM.getMappedMD(D));
EXPECT_EQ(D, MapMetadata(D, VM, RF_None));
}
TEST(ValueMapperTest, MapMetadataSeededWithNull) {
LLVMContext Context;
auto *D = MDTuple::getDistinct(Context, None);
// The node should be moved.
ValueToValueMapTy VM;
EXPECT_EQ(None, VM.getMappedMD(D));
VM.MD().insert(std::make_pair(D, TrackingMDRef()));
EXPECT_EQ(nullptr, *VM.getMappedMD(D));
EXPECT_EQ(nullptr, MapMetadata(D, VM, RF_None));
}
} // end namespace
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