[llvm] r273330 - Make DeadMachineInstructionElim preserve CFG

[Matt Arsenault via llvm-commits]

Author: arsenm
Date: Tue Jun 21 18:01:17 2016
New Revision: 273330

URL: http://llvm.org/viewvc/llvm-project?rev=273330&view=rev
Log:
Make DeadMachineInstructionElim preserve CFG

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

Modified: llvm/trunk/lib/CodeGen/DeadMachineInstructionElim.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/DeadMachineInstructionElim.cpp?rev=273330&r1=273329&r2=273330&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/DeadMachineInstructionElim.cpp (original)
+++ llvm/trunk/lib/CodeGen/DeadMachineInstructionElim.cpp Tue Jun 21 18:01:17 2016
@@ -42,6 +42,11 @@ namespace {
      initializeDeadMachineInstructionElimPass(*PassRegistry::getPassRegistry());
     }
 
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.setPreservesCFG();
+      MachineFunctionPass::getAnalysisUsage(AU);
+    }
+
   private:
     bool isDead(const MachineInstr *MI) const;
   };