Make DetectDeadLanes preserve CFG

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272740 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/DetectDeadLanes.cpp b/lib/CodeGen/DetectDeadLanes.cpp
index 2ba81c7cfe22eaec27844a159676de7735317510..1d9e79c055e0f398a582cd5dada62c0adbf954dd 100644 (file)
--- a/lib/CodeGen/DetectDeadLanes.cpp
+++ b/lib/CodeGen/DetectDeadLanes.cpp
@@ -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