diff options
| author | Serge Pavlov <sepavloff@gmail.com> | 2017-01-10 02:50:47 +0000 |
|---|---|---|
| committer | Serge Pavlov <sepavloff@gmail.com> | 2017-01-10 02:50:47 +0000 |
| commit | b2ae9e2c45861af309c118160f9e910ed20fe2af (patch) | |
| tree | 1989d39dfc766354735b029755e5195eefc66b87 /unittests/IR/DominatorTreeTest.cpp | |
| parent | 6e1f066adf1fd96dc62b8fcf57386fadc3bdf570 (diff) | |
[StructurizeCfg] Update dominator info.
In some cases StructurizeCfg updates root node, but dominator info
remains unchanges, it causes crash when expensive checks are enabled.
To cope with this problem a new method was added to DominatorTreeBase
that allows adding new root nodes, it is called in StructurizeCfg to
put dominator tree in sync.
This change fixes PR27488.
Differential Revision: https://reviews.llvm.org/D28114
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291530 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests/IR/DominatorTreeTest.cpp')
| -rw-r--r-- | unittests/IR/DominatorTreeTest.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/unittests/IR/DominatorTreeTest.cpp b/unittests/IR/DominatorTreeTest.cpp index 6c49deb32d9..ae9c2684212 100644 --- a/unittests/IR/DominatorTreeTest.cpp +++ b/unittests/IR/DominatorTreeTest.cpp @@ -203,6 +203,16 @@ namespace llvm { EXPECT_EQ(DT->getNode(BB4)->getDFSNumIn(), 5UL); EXPECT_EQ(DT->getNode(BB4)->getDFSNumOut(), 6UL); + // Change root node + DT->verifyDomTree(); + BasicBlock *NewEntry = BasicBlock::Create(F.getContext(), "new_entry", + &F, BB0); + BranchInst::Create(BB0, NewEntry); + EXPECT_EQ(F.begin()->getName(), NewEntry->getName()); + EXPECT_TRUE(&F.getEntryBlock() == NewEntry); + DT->setNewRoot(NewEntry); + DT->verifyDomTree(); + return false; } void getAnalysisUsage(AnalysisUsage &AU) const override { |