diff options
Diffstat (limited to 'llvm/lib/CodeGen/BranchFolding.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/BranchFolding.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/BranchFolding.cpp b/llvm/lib/CodeGen/BranchFolding.cpp index 0787ca552d8..c7a0c645716 100644 --- a/llvm/lib/CodeGen/BranchFolding.cpp +++ b/llvm/lib/CodeGen/BranchFolding.cpp @@ -921,11 +921,12 @@ void BranchFolder::mergeCommonTails(unsigned commonTailIndex) { if (UpdateLiveIns) { LivePhysRegs NewLiveIns(*TRI); computeLiveIns(NewLiveIns, *MBB); + LiveRegs.init(*TRI); // The flag merging may lead to some register uses no longer using the // <undef> flag, add IMPLICIT_DEFs in the predecessors as necessary. for (MachineBasicBlock *Pred : MBB->predecessors()) { - LiveRegs.init(*TRI); + LiveRegs.clear(); LiveRegs.addLiveOuts(*Pred); MachineBasicBlock::iterator InsertBefore = Pred->getFirstTerminator(); for (unsigned Reg : NewLiveIns) { |
