[PowerPC] Preserve machine dominator tree in PPCVSXFMAMutate

It is needed by LiveIntervalAnalysis.

llvm-svn: 288243

diff --git a/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp b/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp
index abaf632..f6d20ce 100644 (file)
--- a/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp
+++ b/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp
@@ -21,6 +21,7 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/CodeGen/LiveIntervalAnalysis.h"
+#include "llvm/CodeGen/MachineDominators.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
@@ -374,6 +375,8 @@ public:
       AU.addPreserved<LiveIntervals>();
       AU.addRequired<SlotIndexes>();
       AU.addPreserved<SlotIndexes>();
+      AU.addRequired<MachineDominatorTree>();
+      AU.addPreserved<MachineDominatorTree>();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
   };
@@ -383,6 +386,7 @@ INITIALIZE_PASS_BEGIN(PPCVSXFMAMutate, DEBUG_TYPE,
                       "PowerPC VSX FMA Mutation", false, false)
 INITIALIZE_PASS_DEPENDENCY(LiveIntervals)
 INITIALIZE_PASS_DEPENDENCY(SlotIndexes)
+INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)
 INITIALIZE_PASS_END(PPCVSXFMAMutate, DEBUG_TYPE,
                     "PowerPC VSX FMA Mutation", false, false)