diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/LivePhysRegs.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/LivePhysRegs.cpp b/llvm/lib/CodeGen/LivePhysRegs.cpp index 7d0bf743f31..9b5d7843463 100644 --- a/llvm/lib/CodeGen/LivePhysRegs.cpp +++ b/llvm/lib/CodeGen/LivePhysRegs.cpp @@ -143,11 +143,12 @@ bool LivePhysRegs::available(const MachineRegisterInfo &MRI, /// Add live-in registers of basic block \p MBB to \p LiveRegs. void LivePhysRegs::addBlockLiveIns(const MachineBasicBlock &MBB) { for (const auto &LI : MBB.liveins()) { - if (LI.LaneMask == ~0u) { + MCSubRegIndexIterator S(LI.PhysReg, TRI); + if (LI.LaneMask == ~0u || (LI.LaneMask != 0 && !S.isValid())) { addReg(LI.PhysReg); continue; } - for (MCSubRegIndexIterator S(LI.PhysReg, TRI); S.isValid(); ++S) + for (; S.isValid(); ++S) if (LI.LaneMask & TRI->getSubRegIndexLaneMask(S.getSubRegIndex())) addReg(S.getSubReg()); } |
