[PATCH] D20850: Make DeadMachineInstructionElim preserve CFG

[Matt Arsenault via llvm-commits]

arsenm created this revision.
arsenm added a subscriber: llvm-commits.

http://reviews.llvm.org/D20850

Files:
  lib/CodeGen/DeadMachineInstructionElim.cpp

Index: lib/CodeGen/DeadMachineInstructionElim.cpp
===================================================================
--- lib/CodeGen/DeadMachineInstructionElim.cpp
+++ lib/CodeGen/DeadMachineInstructionElim.cpp
@@ -42,6 +42,11 @@
      initializeDeadMachineInstructionElimPass(*PassRegistry::getPassRegistry());
     }
 
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.setPreservesCFG();
+      MachineFunctionPass::getAnalysisUsage(AU);
+    }
+
   private:
     bool isDead(const MachineInstr *MI) const;
   };


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