[SILOpt] Removed unreachable bailouts.

Now that supportsMoveOnlyTypes is always true, these bailouts can't be
reached.  Delete the bailouts and the predicate.

Author: nate-chandler

include/swift/AST/ASTContext.h

@@ -742,9 +742,6 @@ class ASTContext final {
   FuncDecl *getMakeInvocationEncoderOnDistributedActorSystem(
       AbstractFunctionDecl *thunk) const;
 
-  /// Indicates whether move-only / noncopyable types are supported.
-  bool supportsMoveOnlyTypes() const;
-
   // Retrieve the declaration of
   // DistributedInvocationEncoder.recordGenericSubstitution(_:).
   //

lib/AST/ASTContext.cpp

@@ -6529,8 +6529,3 @@ Type ASTContext::getNamedSwiftType(ModuleDecl *module, StringRef name) {
     return nominalDecl->getDeclaredType();
   return decl->getDeclaredInterfaceType();
 }
-
-bool ASTContext::supportsMoveOnlyTypes() const {
-  // currently the only thing holding back whether the types can appear is this.
-  return true;
-}

lib/SILOptimizer/Mandatory/ConsumeOperatorCopyableAddressesChecker.cpp

@@ -2463,10 +2463,6 @@ class ConsumeOperatorCopyableAddressesCheckerPass
     auto *fn = getFunction();
     auto &astContext = fn->getASTContext();
 
-    // Only run this pass if the move only language feature is enabled.
-    if (!astContext.supportsMoveOnlyTypes())
-      return;
-
     // Don't rerun diagnostics on deserialized functions.
     if (getFunction()->wasDeserializedCanonical())
       return;

lib/SILOptimizer/Mandatory/ConsumeOperatorCopyableValuesChecker.cpp

@@ -553,10 +553,6 @@ class ConsumeOperatorCopyableValuesCheckerPass : public SILFunctionTransform {
   void run() override {
     auto *fn = getFunction();
 
-    // Only run this pass if the move only language feature is enabled.
-    if (!fn->getASTContext().supportsMoveOnlyTypes())
-      return;
-
     // Don't rerun diagnostics on deserialized functions.
     if (fn->wasDeserializedCanonical())
       return;

lib/SILOptimizer/Mandatory/MoveOnlyAddressCheckerTester.cpp

@@ -78,10 +78,6 @@ class MoveOnlyAddressCheckerTesterPass : public SILFunctionTransform {
   void run() override {
     auto *fn = getFunction();
 
-    // Only run this pass if the move only language feature is enabled.
-    if (!fn->getASTContext().supportsMoveOnlyTypes())
-      return;
-
     // Don't rerun diagnostics on deserialized functions.
     if (getFunction()->wasDeserializedCanonical())
       return;

lib/SILOptimizer/Mandatory/MoveOnlyBorrowToDestructureTester.cpp

@@ -71,10 +71,6 @@ class MoveOnlyBorrowToDestructureTransformPass : public SILFunctionTransform {
   void run() override {
     auto *fn = getFunction();
 
-    // Only run this pass if the move only language feature is enabled.
-    if (!fn->getASTContext().supportsMoveOnlyTypes())
-      return;
-
     // Don't rerun diagnostics on deserialized functions.
     if (getFunction()->wasDeserializedCanonical())
       return;

lib/SILOptimizer/Mandatory/MoveOnlyChecker.cpp

@@ -215,10 +215,6 @@ class MoveOnlyCheckerPass : public SILFunctionTransform {
   void run() override {
     auto *fn = getFunction();
 
-    // Only run this pass if the move only language feature is enabled.
-    if (!fn->getASTContext().supportsMoveOnlyTypes())
-      return;
-
     // Don't rerun diagnostics on deserialized functions.
     if (getFunction()->wasDeserializedCanonical())
       return;

lib/SILOptimizer/Mandatory/MoveOnlyObjectCheckerTester.cpp

@@ -75,10 +75,6 @@ class MoveOnlyObjectCheckerTesterPass : public SILFunctionTransform {
   void run() override {
     auto *fn = getFunction();
 
-    // Only run this pass if the move only language feature is enabled.
-    if (!fn->getASTContext().supportsMoveOnlyTypes())
-      return;
-
     // Don't rerun diagnostics on deserialized functions.
     if (getFunction()->wasDeserializedCanonical())
       return;

lib/SILOptimizer/Mandatory/MoveOnlyTempAllocationFromLetTester.cpp

@@ -34,10 +34,6 @@ struct MoveOnlyTempAllocationFromLetTester : SILFunctionTransform {
   void run() override {
     auto *fn = getFunction();
 
-    // Only run this pass if the move only language feature is enabled.
-    if (!fn->getASTContext().supportsMoveOnlyTypes())
-      return;
-
     // Don't rerun diagnostics on deserialized functions.
     if (getFunction()->wasDeserializedCanonical())
       return;