[llvm-commits] [llvm] r159020 - /llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Fri Jun 22 13:51:35 2012
New Revision: 159020

URL: http://llvm.org/viewvc/llvm-project?rev=159020&view=rev
Log:
Don't depend on live ranges being present.

DBG_VALUE instructions could be referring to non-existing virtual
registers.

Modified:
    llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp

Modified: llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp?rev=159020&r1=159019&r2=159020&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp Fri Jun 22 13:51:35 2012
@@ -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;
     }