add missing MemorySSAWrapperPass dependency macro to MemCpyOptLegacyPass

[lkeegan]

Summary

Add MemorySSAWrapperPass as a dependency to MemCpyOptLegacyPass,
since MemCpyOpt now uses MemorySSA by default.

[nikic]

LGTM

[lkeegan]

Thanks for the reviews, I don't have commit access afaik, if someone could commit it that would be great!

[nikic]

@lkeegan Could you please provide Your Name <your@email> to use for the commit?

[lkeegan]

Liam Keegan <[e-mail]>

llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp

 INITIALIZE_PASS_BEGIN(MemCpyOptLegacyPass, "memcpyopt", "MemCpy Optimization",
                       false, false)
 INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
 INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(MemoryDependenceWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(GlobalsAAWrapperPass)
+INITIALIZE_PASS_DEPENDENCY(MemorySSAWrapperPass)
 INITIALIZE_PASS_END(MemCpyOptLegacyPass, "memcpyopt", "MemCpy Optimization",
                     false, false)
 
 // Check that V is either not accessible by the caller, or unwinding cannot
 // occur between Start and End.
 static bool mayBeVisibleThroughUnwinding(Value *V, Instruction *Start,
                                          Instruction *End) {
   assert(Start->getParent() == End->getParent() && "Must be in same block");