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Add unittest for new CanReplace flag on MDNodes

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This adds a unittest for the support added in r256648 to add
a flag that can be used to prevent RAUW on temporary metadata
used as a map key.

llvm-svn: 256938
This commit is contained in:
Teresa Johnson 2016-01-06 15:02:40 +00:00
parent 787f659237
commit ae16c1fff2
1 changed files with 14 additions and 0 deletions
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14
unittests/IR/MetadataTest.cpp
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@ -494,6 +494,20 @@ TEST_F(MDNodeTest, isTemporary) {
EXPECT_TRUE(T->isTemporary());
}
#if defined(GTEST_HAS_DEATH_TEST) && !defined(NDEBUG)
TEST_F(MDNodeTest, deathOnNoReplaceTemporaryRAUW) {
auto Temp = MDNode::getTemporary(Context, None);
Temp->setCanReplace(false);
EXPECT_DEATH(Temp->replaceAllUsesWith(nullptr),
"Attempted to replace Metadata marked for no replacement");
Temp->setCanReplace(true);
// Remove the references to Temp; required for teardown.
Temp->replaceAllUsesWith(nullptr);
}
#endif
TEST_F(MDNodeTest, getDistinctWithUnresolvedOperands) {
// temporary !{}
auto Temp = MDTuple::getTemporary(Context, None);