Fix problem fusing spill code into instructions: we didn't update the live

variable information to take into account the change of instruction
address.

llvm-svn: 11628

lib/CodeGen/RegAllocLocal.cpp

@@ -496,6 +496,9 @@ MachineInstr *RA::reloadVirtReg(MachineBasicBlock &MBB, MachineInstr *MI,
     MachineBasicBlock::iterator MII = MI;
     if (RegInfo->foldMemoryOperand(MII, OpNum, FrameIndex)) {
       ++NumFused;
+      // Since we changed the address of MI, make sure to update live variables
+      // to know that the new instruction has the properties of the old one.
+      LV->instructionChanged(MI, MII);
       return MII;
     }