IR: Store RAUW support and Context in the same pointer, NFC
Add an `LLVMContext &` to `ReplaceableMetadataImpl`, create a class that
either holds a reference to an `LLVMContext` or owns a
`ReplaceableMetadataImpl`, and use the new class in `MDNode`.
- This saves a pointer in `UniquableMDNode` at the cost of a pointer
in `ValueAsMetadata` (which didn't used to store the `LLVMContext`).
There are far more of the former.
- Unifies RAUW support between `MDNodeFwdDecl` (which is going away,
see r226481) and `UniquableMDNode`.
llvm-svn: 226484
diff --git a/llvm/unittests/IR/MetadataTest.cpp b/llvm/unittests/IR/MetadataTest.cpp
index 930bebf..2de1f06 100644
--- a/llvm/unittests/IR/MetadataTest.cpp
+++ b/llvm/unittests/IR/MetadataTest.cpp
@@ -20,6 +20,43 @@
namespace {
+TEST(ContextAndReplaceableUsesTest, FromContext) {
+ LLVMContext Context;
+ ContextAndReplaceableUses CRU(Context);
+ EXPECT_EQ(&Context, &CRU.getContext());
+ EXPECT_FALSE(CRU.hasReplaceableUses());
+ EXPECT_FALSE(CRU.getReplaceableUses());
+}
+
+TEST(ContextAndReplaceableUsesTest, FromReplaceableUses) {
+ LLVMContext Context;
+ ContextAndReplaceableUses CRU(make_unique<ReplaceableMetadataImpl>(Context));
+ EXPECT_EQ(&Context, &CRU.getContext());
+ EXPECT_TRUE(CRU.hasReplaceableUses());
+ EXPECT_TRUE(CRU.getReplaceableUses());
+}
+
+TEST(ContextAndReplaceableUsesTest, makeReplaceable) {
+ LLVMContext Context;
+ ContextAndReplaceableUses CRU(Context);
+ CRU.makeReplaceable(make_unique<ReplaceableMetadataImpl>(Context));
+ EXPECT_EQ(&Context, &CRU.getContext());
+ EXPECT_TRUE(CRU.hasReplaceableUses());
+ EXPECT_TRUE(CRU.getReplaceableUses());
+}
+
+TEST(ContextAndReplaceableUsesTest, takeReplaceableUses) {
+ LLVMContext Context;
+ auto ReplaceableUses = make_unique<ReplaceableMetadataImpl>(Context);
+ auto *Ptr = ReplaceableUses.get();
+ ContextAndReplaceableUses CRU(std::move(ReplaceableUses));
+ ReplaceableUses = CRU.takeReplaceableUses();
+ EXPECT_EQ(&Context, &CRU.getContext());
+ EXPECT_FALSE(CRU.hasReplaceableUses());
+ EXPECT_FALSE(CRU.getReplaceableUses());
+ EXPECT_EQ(Ptr, ReplaceableUses.get());
+}
+
class MetadataTest : public testing::Test {
protected:
LLVMContext Context;