[llvm] r272740 - Make DetectDeadLanes preserve CFG

[Matt Arsenault via llvm-commits]

Author: arsenm
Date: Tue Jun 14 19:25:09 2016
New Revision: 272740

URL: http://llvm.org/viewvc/llvm-project?rev=272740&view=rev
Log:
Make DetectDeadLanes preserve CFG

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

Modified: llvm/trunk/lib/CodeGen/DetectDeadLanes.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/DetectDeadLanes.cpp?rev=272740&r1=272739&r2=272740&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/DetectDeadLanes.cpp (original)
+++ llvm/trunk/lib/CodeGen/DetectDeadLanes.cpp Tue Jun 14 19:25:09 2016
@@ -65,6 +65,11 @@ public:
 
   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