Frontend: Remove a couple of obsolete staging flags

include/swift/AST/SILOptions.h

@@ -163,9 +163,6 @@ class SILOptions {
   /// }
   bool EnableDynamicReplacementCanCallPreviousImplementation = true;
 
-  /// Enable large loadable types IRGen pass.
-  bool EnableLargeLoadableTypes = true;
-
   /// The name of the file to which the backend should save optimization
   /// records.
   std::string OptRecordFile;

include/swift/Basic/LangOptions.h

@@ -224,9 +224,6 @@ namespace swift {
     /// Whether to dump debug info for request evaluator cycles.
     bool DebugDumpCycles = false;
 
-    /// Enable SIL type lowering
-    bool EnableSubstSILFunctionTypesForFunctionValues = true;
-
     /// Whether to diagnose an ephemeral to non-ephemeral conversion as an
     /// error.
     bool DiagnoseInvalidEphemeralnessAsError = false;

include/swift/Option/FrontendOptions.td

@@ -376,17 +376,10 @@ def suppress_static_exclusivity_swap : Flag<["-"], "suppress-static-exclusivity-
 def enable_sil_opaque_values : Flag<["-"], "enable-sil-opaque-values">,
   HelpText<"Enable SIL Opaque Values">;
 
-def enable_large_loadable_types : Flag<["-"], "enable-large-loadable-types">,
-  HelpText<"Enable Large Loadable types IRGen pass">;
-
 def enable_experimental_static_assert :
   Flag<["-"], "enable-experimental-static-assert">,
   HelpText<"Enable experimental #assert">;
 
-def enable_subst_sil_function_types_for_function_values :
-  Flag<["-"], "enable-subst-sil-function-types-for-function-values">,
-  HelpText<"Use substituted function types for SIL type lowering of function values">;
-
 def enable_deserialization_recovery :
   Flag<["-"], "enable-deserialization-recovery">,
   HelpText<"Attempt to recover from missing xrefs (etc) in swiftmodules">;

lib/Frontend/CompilerInvocation.cpp

@@ -389,9 +389,6 @@ static bool ParseLangArgs(LangOptions &Opts, ArgList &Args,
   Opts.DisableImplicitConcurrencyModuleImport |=
     Args.hasArg(OPT_disable_implicit_concurrency_module_import);
 
-  Opts.EnableSubstSILFunctionTypesForFunctionValues |=
-    Args.hasArg(OPT_enable_subst_sil_function_types_for_function_values);
-
   Opts.DiagnoseInvalidEphemeralnessAsError |=
       Args.hasArg(OPT_enable_invalid_ephemeralness_as_error);
 
@@ -1181,7 +1178,6 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
   Opts.DisableSILPartialApply |=
     Args.hasArg(OPT_disable_sil_partial_apply);
   Opts.VerifySILOwnership &= !Args.hasArg(OPT_disable_sil_ownership_verifier);
-  Opts.EnableLargeLoadableTypes |= Args.hasArg(OPT_enable_large_loadable_types);
   Opts.EnableDynamicReplacementCanCallPreviousImplementation = !Args.hasArg(
       OPT_disable_previous_implementation_calls_in_dynamic_replacements);
 

lib/SIL/IR/SILFunctionType.cpp

@@ -2137,9 +2137,6 @@ static CanSILFunctionType getSILFunctionType(
                                  substFormalResultType);
 
   bool shouldBuildSubstFunctionType = [&]{
-    if (!TC.Context.LangOpts.EnableSubstSILFunctionTypesForFunctionValues)
-      return false;
-
     // We always use substituted function types for coroutines that are
     // being lowered in the context of another coroutine, which is to say,
     // for class override thunks.  This is required to make the yields

lib/SIL/IR/TypeLowering.cpp

@@ -3164,8 +3164,7 @@ TypeConverter::checkFunctionForABIDifferences(SILModule &M,
   // We might still want to conditionalize this behavior even after we commit
   // substituted function types, to avoid bloating
   // IR for platforms that don't differentiate function type representations.
-  bool DifferentFunctionTypesHaveDifferentRepresentation
-    = Context.LangOpts.EnableSubstSILFunctionTypesForFunctionValues;
+  bool DifferentFunctionTypesHaveDifferentRepresentation = true;
 
   // TODO: For C language types we should consider the attached Clang types.
   if (fnTy1->getLanguage() == SILFunctionLanguage::C)

lib/SILOptimizer/PassManager/PassPipeline.cpp

@@ -721,9 +721,8 @@ SILPassPipelinePlan::getIRGenPreparePassPipeline(const SILOptions &Options) {
   // Hoist generic alloc_stack instructions to the entry block to enable better
   // llvm-ir generation for dynamic alloca instructions.
   P.addAllocStackHoisting();
-  if (Options.EnableLargeLoadableTypes) {
-    P.addLoadableByAddress();
-  }
+  P.addLoadableByAddress();
+
   return P;
 }
 

test/AutoDiff/IRGen/loadable_by_address.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -c -enable-large-loadable-types -Xllvm -sil-verify-after-pass=loadable-address %s
+// RUN: %target-swift-frontend -c -Xllvm -sil-verify-after-pass=loadable-address %s
 // RUN: %target-swift-frontend -emit-sil %s | %FileCheck %s -check-prefix=CHECK-SIL
 // RUN: %target-swift-frontend -c -Xllvm -sil-print-after=loadable-address %s 2>&1 | %FileCheck %s -check-prefix=CHECK-LBA-SIL
 // RUN: %target-run-simple-swift

test/IRGen/big_types_corner_cases.sil

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -I %S/Inputs/abi %s -emit-ir -enable-large-loadable-types | %FileCheck %s
+// RUN: %target-swift-frontend -I %S/Inputs/abi %s -emit-ir | %FileCheck %s
 
 // REQUIRES: CPU=x86_64
 // REQUIRES: OS=macosx

test/IRGen/big_types_corner_cases.swift

@@ -1,6 +1,6 @@
 // XFAIL: CPU=powerpc64le
 // XFAIL: CPU=s390x
-// RUN: %target-swift-frontend -disable-type-layout -enable-large-loadable-types %s -emit-ir | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize
+// RUN: %target-swift-frontend -disable-type-layout %s -emit-ir | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize
 // REQUIRES: optimized_stdlib
 // UNSUPPORTED: CPU=powerpc64le
 

test/IRGen/big_types_corner_cases_as_library.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -enable-large-loadable-types -disable-type-layout %s -emit-ir  -parse-as-library | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize
+// RUN: %target-swift-frontend -disable-type-layout %s -emit-ir  -parse-as-library | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize
 
 public struct BigStruct {
   var i0 : Int32 = 0

test/IRGen/big_types_corner_cases_tiny.swift

@@ -1,5 +1,5 @@
 
-// RUN: %target-swift-frontend -enable-large-loadable-types -primary-file %s %S/big_types_corner_cases.swift -emit-ir | %FileCheck %s --check-prefix=CHECK
+// RUN: %target-swift-frontend -primary-file %s %S/big_types_corner_cases.swift -emit-ir | %FileCheck %s --check-prefix=CHECK
 // REQUIRES: optimized_stdlib
 
 // DO NOT ADD ANY MORE CODE TO THIS FILE!

test/IRGen/big_types_generic.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %swift -c -primary-file %s -enable-large-loadable-types -Xllvm -sil-print-after=loadable-address -sil-verify-all -o %t/big_types_generic.o 2>&1 | %FileCheck %s
+// RUN: %swift -c -primary-file %s -Xllvm -sil-print-after=loadable-address -sil-verify-all -o %t/big_types_generic.o 2>&1 | %FileCheck %s
 
 struct Big<T> {
   var a0 : T

test/IRGen/big_types_tests.sil

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -I %S/Inputs/abi %s -emit-ir -enable-large-loadable-types -sil-verify-all | %FileCheck %s
+// RUN: %target-swift-frontend -I %S/Inputs/abi %s -emit-ir -sil-verify-all | %FileCheck %s
 
 // REQUIRES: CPU=x86_64
 // REQUIRES: OS=macosx

test/SILGen/function_type_conversion.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -emit-silgen -disable-availability-checking -module-name main -enable-subst-sil-function-types-for-function-values %s | %FileCheck %s
+// RUN: %target-swift-frontend -emit-silgen -disable-availability-checking -module-name main %s | %FileCheck %s
 
 func generic<T, U>(_ f: @escaping (T) -> U) -> (T) -> U { return f }
 

test/SILGen/function_type_lowering.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -emit-silgen -disable-availability-checking -module-name main -enable-subst-sil-function-types-for-function-values %s | %FileCheck %s
+// RUN: %target-swift-frontend -emit-silgen -disable-availability-checking -module-name main %s | %FileCheck %s
 
 
 // Similarly-abstract generic signatures should share an unsubstituted type