diff options
Diffstat (limited to 'lib/CodeGen/LiveDebugVariables.cpp')
| -rw-r--r-- | lib/CodeGen/LiveDebugVariables.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/LiveDebugVariables.cpp b/lib/CodeGen/LiveDebugVariables.cpp index 783a7e1ded..292928f8e7 100644 --- a/lib/CodeGen/LiveDebugVariables.cpp +++ b/lib/CodeGen/LiveDebugVariables.cpp @@ -840,6 +840,9 @@ UserValue::rewriteLocations(VirtRegMap &VRM, const TargetRegisterInfo &TRI) { unsigned VirtReg = Loc.getReg(); if (VRM.isAssignedReg(VirtReg) && TargetRegisterInfo::isPhysicalRegister(VRM.getPhys(VirtReg))) { + // This can create a %noreg operand in rare cases when the sub-register + // index is no longer available. That means the user value is in a + // non-existent sub-register, and %noreg is exactly what we want. Loc.substPhysReg(VRM.getPhys(VirtReg), TRI); } else if (VRM.getStackSlot(VirtReg) != VirtRegMap::NO_STACK_SLOT && VRM.isSpillSlotUsed(VRM.getStackSlot(VirtReg))) { @@ -942,6 +945,7 @@ void LDVImpl::emitDebugValues(VirtRegMap *VRM) { DEBUG(dbgs() << "********** EMITTING LIVE DEBUG VARIABLES **********\n"); const TargetInstrInfo *TII = MF->getTarget().getInstrInfo(); for (unsigned i = 0, e = userValues.size(); i != e; ++i) { + DEBUG(userValues[i]->print(dbgs(), &MF->getTarget())); userValues[i]->rewriteLocations(*VRM, *TRI); userValues[i]->emitDebugValues(VRM, *LIS, *TII); } |