Remove sil option flags that are no longer needed.

Swift SVN r25828

include/swift/AST/SILOptions.h

@@ -48,9 +48,6 @@ public:
   /// Remove all runtime assertions during optimizations.
   bool RemoveRuntimeAsserts = false;
 
-  /// Controls whether the SIL ARC optimizations are run.
-  bool EnableARCOptimizations = true;
-
   /// Controls whether or not paranoid verification checks are run.
   bool VerifyAll = false;
 
@@ -86,9 +83,6 @@ public:
   /// Should we print out instruction counts if -print-stats is passed in?
   bool PrintInstCounts = false;
 
-  /// Should we optimize function signatures?
-  bool EnableFuncSigOpts = true;
-
   /// Should we emit self as a guaranteed parameter?
   bool EnableGuaranteedSelf = false;
 

lib/Frontend/CompilerInvocation.cpp

@@ -863,14 +863,12 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
   // -Ounchecked might also set removal of runtime asserts (cond_fail).
   Opts.RemoveRuntimeAsserts |= Args.hasArg(OPT_remove_runtime_asserts);
 
-  Opts.EnableARCOptimizations |= !Args.hasArg(OPT_disable_arc_opts);
   Opts.VerifyAll |= Args.hasArg(OPT_sil_verify_all);
   Opts.PrintAll |= Args.hasArg(OPT_sil_print_all);
   Opts.PrintPassName |= Args.hasArg(OPT_sil_print_pass_name);
   Opts.TimeTransforms |= Args.hasArg(OPT_sil_time_transforms);
   Opts.DebugSerialization |= Args.hasArg(OPT_sil_debug_serialization);
   Opts.PrintInstCounts |= Args.hasArg(OPT_print_inst_counts);
-  Opts.EnableFuncSigOpts &= !Args.hasArg(OPT_disable_func_sig_opts);
   Opts.EnableGuaranteedSelf |= Args.hasArg(OPT_enable_guaranteed_self);
   if (const Arg *A = Args.getLastArg(OPT_external_pass_pipeline_filename))
     Opts.ExternalPassPipelineFilename = A->getValue();

lib/SILPasses/GlobalARCOpts.cpp

@@ -220,10 +220,6 @@ namespace {
 class GlobalARCOpts : public SILFunctionTransform {
   /// The entry point to the transformation.
   void run() override {
-    // If ARC optimizations are disabled, don't optimize anything and bail.
-    if (!getOptions().EnableARCOptimizations)
-      return;
-
     auto *AA = getAnalysis<AliasAnalysis>();
     auto *POTA = getAnalysis<PostOrderAnalysis>();
     auto *RCIA = getAnalysis<RCIdentityAnalysis>();

lib/SILPasses/Passes.cpp

@@ -269,7 +269,6 @@ void swift::runSILOptimizationPasses(SILModule &Module) {
   // We do this late since it is a pass like the inline caches that we only want
   // to run once very late. Make sure to run at least one round of the ARC
   // optimizer after this.
-  if (Module.getOptions().EnableFuncSigOpts)
   PM.add(createFunctionSignatureOpts());
 
   PM.run();