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[LLVM][Transforms] Add unit test for resolved cloning bug #139223

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Merged
merged 1 commit into from
May 12, 2025
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[LLVM][Transforms] Add unit test for resolved cloning bug #139223

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19 changes: 19 additions & 0 deletions llvm/unittests/Transforms/Utils/CloningTest.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1004,6 +1004,16 @@ class CloneModule : public ::testing::Test {
Function::Create(FuncType, GlobalValue::ExternalLinkage, "g", OldM);
G->addMetadata(LLVMContext::MD_type, *MDNode::get(C, {}));

auto *NonEntryBlock = BasicBlock::Create(C, "", F);
IBuilder.SetInsertPoint(NonEntryBlock);
IBuilder.CreateRetVoid();

// Create a global that contains the block address in its initializer.
auto *BlockAddress = BlockAddress::get(NonEntryBlock);
new GlobalVariable(*OldM, BlockAddress->getType(), /*isConstant=*/true,
GlobalVariable::ExternalLinkage, BlockAddress,
"blockaddr");

// Finalize the debug info
DBuilder.finalize();
}
Expand Down Expand Up @@ -1266,4 +1276,13 @@ TEST_F(CloneInstruction, cloneKeyInstructions) {
#undef EXPECT_ATOM
}

// Checks that block addresses in global initializers are properly cloned.
TEST_F(CloneModule, GlobalWithBlockAddressesInitializer) {
auto *OriginalBa = cast<BlockAddress>(
OldM->getGlobalVariable("blockaddr")->getInitializer());
auto *ClonedBa = cast<BlockAddress>(
NewM->getGlobalVariable("blockaddr")->getInitializer());
ASSERT_NE(OriginalBa->getBasicBlock(), ClonedBa->getBasicBlock());
}

} // namespace
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