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eeb2c7e32c
Support seeding a ValueMap with nullptr for Metadata entries, a situation I didn't consider in the Metadata/Value split. I added a ValueMapper::getMappedMD accessor that returns an Optional<Metadata*> with the mapped (possibly null) metadata. IRMover needs to use this to avoid modifying the map when it's checking for unneeded subprograms. I updated a call from bugpoint since I find the new code clearer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265228 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
//===- ValueMapper.cpp - Unit tests for ValueMapper -----------------------===//
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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 "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Metadata.h"
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#include "llvm/Transforms/Utils/ValueMapper.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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TEST(ValueMapperTest, MapMetadataUnresolved) {
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LLVMContext Context;
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TempMDTuple T = MDTuple::getTemporary(Context, None);
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ValueToValueMapTy VM;
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EXPECT_EQ(T.get(), MapMetadata(T.get(), VM, RF_NoModuleLevelChanges));
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}
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TEST(ValueMapperTest, MapMetadataDistinct) {
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LLVMContext Context;
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auto *D = MDTuple::getDistinct(Context, None);
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{
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// The node should be cloned.
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ValueToValueMapTy VM;
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EXPECT_NE(D, MapMetadata(D, VM, RF_None));
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}
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{
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// The node should be moved.
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ValueToValueMapTy VM;
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EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
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}
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}
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TEST(ValueMapperTest, MapMetadataDistinctOperands) {
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LLVMContext Context;
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Metadata *Old = MDTuple::getDistinct(Context, None);
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auto *D = MDTuple::getDistinct(Context, Old);
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ASSERT_EQ(Old, D->getOperand(0));
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Metadata *New = MDTuple::getDistinct(Context, None);
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ValueToValueMapTy VM;
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VM.MD()[Old].reset(New);
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// Make sure operands are updated.
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EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
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EXPECT_EQ(New, D->getOperand(0));
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}
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TEST(ValueMapperTest, MapMetadataSeeded) {
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LLVMContext Context;
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auto *D = MDTuple::getDistinct(Context, None);
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// The node should be moved.
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ValueToValueMapTy VM;
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EXPECT_EQ(None, VM.getMappedMD(D));
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VM.MD().insert(std::make_pair(D, TrackingMDRef(D)));
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EXPECT_EQ(D, *VM.getMappedMD(D));
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EXPECT_EQ(D, MapMetadata(D, VM, RF_None));
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}
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TEST(ValueMapperTest, MapMetadataSeededWithNull) {
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LLVMContext Context;
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auto *D = MDTuple::getDistinct(Context, None);
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// The node should be moved.
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ValueToValueMapTy VM;
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EXPECT_EQ(None, VM.getMappedMD(D));
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VM.MD().insert(std::make_pair(D, TrackingMDRef()));
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EXPECT_EQ(nullptr, *VM.getMappedMD(D));
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EXPECT_EQ(nullptr, MapMetadata(D, VM, RF_None));
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}
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} // end namespace
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