Rename Devirtualizer.cpp to SpeculativeDevirtualizer.cpp.

This file now contains only the speculative devirtualization pass, so
rename accordingly.

Also remove remaining references to "inline caches", since we're now
calling it speculative devirtualization.

Swift SVN r31096

utils/pass-pipeline/src/pass_pipeline_library.py

@@ -80,7 +80,7 @@ def ssapass_passlist(optlevel):
         p.GlobalLoadStoreOpts,
         p.CodeMotion, # Need to add proper argument here
         p.GlobalARCOpts,
-        p.Devirtualizer,
+        p.SpeculativeDevirtualizer,
         p.GenericSpecializer,
         p.SILLinker,
         inliner_for_optlevel(optlevel),
@@ -96,8 +96,7 @@ def lower_passlist():
         p.GlobalOpt,
         p.CapturePropagation,
         p.ClosureSpecializer,
-        p.Devirtualizer,
-        p.InlineCaches,
+        p.SpeculativeDevirtualizer,
         p.FunctionSignatureOpts,
     ])