[PATCH] D20868: Make DetectDeadLanes preserve CFG

[Matt Arsenault via llvm-commits]

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

http://reviews.llvm.org/D20868

Files:
  lib/CodeGen/DetectDeadLanes.cpp

Index: lib/CodeGen/DetectDeadLanes.cpp
===================================================================
--- lib/CodeGen/DetectDeadLanes.cpp
+++ lib/CodeGen/DetectDeadLanes.cpp
@@ -65,6 +65,11 @@
 
   const char *getPassName() const override { return "Detect Dead Lanes"; }
 
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    MachineFunctionPass::getAnalysisUsage(AU);
+  }
+
 private:
   /// Add used lane bits on the register used by operand \p MO. This translates
   /// the bitmask based on the operands subregister, and puts the register into


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