Don't depend on live ranges being present.
DBG_VALUE instructions could be referring to non-existing virtual
registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159020 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveDebugVariables.cpp b/lib/CodeGen/LiveDebugVariables.cpp
index dd28252..c32ce2d 100644
--- a/lib/CodeGen/LiveDebugVariables.cpp
+++ b/lib/CodeGen/LiveDebugVariables.cpp
@@ -642,11 +642,16 @@
// Register locations are constrained to where the register value is live.
if (TargetRegisterInfo::isVirtualRegister(Loc.getReg())) {
- LiveInterval *LI = &LIS.getInterval(Loc.getReg());
- const VNInfo *VNI = LI->getVNInfoAt(Idx);
+ LiveInterval *LI = 0;
+ const VNInfo *VNI = 0;
+ if (LIS.hasInterval(Loc.getReg())) {
+ LI = &LIS.getInterval(Loc.getReg());
+ VNI = LI->getVNInfoAt(Idx);
+ }
SmallVector<SlotIndex, 16> Kills;
extendDef(Idx, LocNo, LI, VNI, &Kills, LIS, MDT, UVS);
- addDefsFromCopies(LI, LocNo, Kills, Defs, MRI, LIS);
+ if (LI)
+ addDefsFromCopies(LI, LocNo, Kills, Defs, MRI, LIS);
continue;
}