diff options
Diffstat (limited to 'llvm/lib/CodeGen/LiveRangeCalc.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveRangeCalc.cpp | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/llvm/lib/CodeGen/LiveRangeCalc.cpp b/llvm/lib/CodeGen/LiveRangeCalc.cpp index 26f6e1ede1ad..f7d9e5c44ac2 100644 --- a/llvm/lib/CodeGen/LiveRangeCalc.cpp +++ b/llvm/lib/CodeGen/LiveRangeCalc.cpp @@ -217,13 +217,18 @@ bool LiveRangeCalc::findReachingDefs(LiveRange &LR, MachineBasicBlock &UseMBB, report_fatal_error("Use not jointly dominated by defs."); } - if (Register::isPhysicalRegister(PhysReg) && !MBB->isLiveIn(PhysReg)) { - MBB->getParent()->verify(); + if (Register::isPhysicalRegister(PhysReg)) { const TargetRegisterInfo *TRI = MRI->getTargetRegisterInfo(); - errs() << "The register " << printReg(PhysReg, TRI) - << " needs to be live in to " << printMBBReference(*MBB) - << ", but is missing from the live-in list.\n"; - report_fatal_error("Invalid global physical register"); + bool IsLiveIn = MBB->isLiveIn(PhysReg); + for (MCRegAliasIterator Alias(PhysReg, TRI, false); !IsLiveIn && Alias.isValid(); ++Alias) + IsLiveIn = MBB->isLiveIn(*Alias); + if (!IsLiveIn) { + MBB->getParent()->verify(); + errs() << "The register " << printReg(PhysReg, TRI) + << " needs to be live in to " << printMBBReference(*MBB) + << ", but is missing from the live-in list.\n"; + report_fatal_error("Invalid global physical register"); + } } #endif FoundUndef |= MBB->pred_empty(); |