test/SILOptimizer/optimize_never.sil - third_party/swift - Git at Google

 // RUN: %target-sil-opt -enable-sil-verify-all -inline -specdevirt  %s | FileCheck %s

 // Check that the  @_semantics("optimize.sil.never") annotation prevents
 // any optimizations of the annotated function:
 // - No functions are inlined into the annotated function.
 // - No calls are devirtualized in the body of the annotated function.
 // - No generic specializations of the annotated function are generated.
 // - The annotated function is not inlined into any other function.

 sil_stage canonical

 import Builtin
 import Swift
 import SwiftShims

 public class C {
   @inline(never) func foo() -> Int32
    deinit
   init()
 }

 public class D : C {
   @inline(never) override func foo() -> Int32
    deinit
   override init()
 }

 public func transform1<T>(x: T) -> Int32

 @_semantics("optimize.sil.never") public func foo1<T>(x: T, _ c: C) -> Int32

 public func boo1(c: C) -> Int32

 public func transform2(x: Int32) -> Int32

 @_semantics("optimize.sil.never") public func foo2(x: Int32, _ c: C) -> Int32

 public func boo2(c: C) -> Int32

 public func transform3<T>(x: T) -> Int32

 public func foo3<T>(x: T, _ c: C) -> Int32

 public func boo3(c: C) -> Int32

 public func transform4(x: Int32) -> Int32

 public func foo4(x: Int32, _ c: C) -> Int32

 public func boo4(c: C) -> Int32


 sil_global [fragile] @_TZvOs7Process5_argcVs5Int32 : $Int32


 sil_global private_external [fragile] @globalinit_33_1BDF70FFC18749BAB495A73B459ED2F0_token5 : $Builtin.Word


 sil_global [fragile] @_TZvOs7Process11_unsafeArgvGSpGSpVs4Int8__ : $UnsafeMutablePointer<UnsafeMutablePointer<Int8>>


 sil hidden [noinline] @_TFC14optimize_never1C3foofT_Vs5Int32 : $@convention(method) (@guaranteed C) -> Int32 {
 bb0(%0 : $C):
   %2 = integer_literal $Builtin.Int32, 1
   %3 = struct $Int32 (%2 : $Builtin.Int32)
   return %3 : $Int32
 }


 sil [transparent] [fragile] @_TFVs5Int32CfT22_builtinIntegerLiteralBi2048__S_ : $@convention(thin) (Builtin.Int2048, @thin Int32.Type) -> Int32


 sil @_TFC14optimize_never1CD : $@convention(method) (@owned C) -> () {
 bb0(%0 : $C):
   %2 = function_ref @_TFC14optimize_never1Cd : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
   %3 = apply %2(%0) : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
   %4 = unchecked_ref_cast %3 : $Builtin.NativeObject to $C
   dealloc_ref %4 : $C
   %6 = tuple ()
   return %6 : $()
 }


 sil @_TFC14optimize_never1Cd : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject {
 bb0(%0 : $C):
   %2 = unchecked_ref_cast %0 : $C to $Builtin.NativeObject
   return %2 : $Builtin.NativeObject
 }


 sil hidden @_TFC14optimize_never1CcfT_S0_ : $@convention(method) (@owned C) -> @owned C {
 bb0(%0 : $C):
   return %0 : $C
 }


 sil hidden [noinline] @_TFC14optimize_never1D3foofT_Vs5Int32 : $@convention(method) (@guaranteed D) -> Int32 {
 bb0(%0 : $D):
   %2 = integer_literal $Builtin.Int32, 11
   %3 = struct $Int32 (%2 : $Builtin.Int32)
   return %3 : $Int32
 }


 sil @_TFC14optimize_never1DD : $@convention(method) (@owned D) -> () {
 bb0(%0 : $D):
   %2 = function_ref @_TFC14optimize_never1Dd : $@convention(method) (@guaranteed D) -> @owned Builtin.NativeObject
   %3 = apply %2(%0) : $@convention(method) (@guaranteed D) -> @owned Builtin.NativeObject
   %4 = unchecked_ref_cast %3 : $Builtin.NativeObject to $D
   dealloc_ref %4 : $D
   %6 = tuple ()
   return %6 : $()
 }


 sil @_TFC14optimize_never1Dd : $@convention(method) (@guaranteed D) -> @owned Builtin.NativeObject {
 bb0(%0 : $D):
   %2 = upcast %0 : $D to $C
   %3 = function_ref @_TFC14optimize_never1Cd : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
   %4 = apply %3(%2) : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
   return %4 : $Builtin.NativeObject
 }


 sil hidden @_TFC14optimize_never1DcfT_S0_ : $@convention(method) (@owned D) -> @owned D {
 bb0(%0 : $D):
   %1 = alloc_stack $D
   store %0 to %1#1 : $*D
   %3 = upcast %0 : $D to $C

   %4 = function_ref @_TFC14optimize_never1CcfT_S0_ : $@convention(method) (@owned C) -> @owned C
   %5 = apply %4(%3) : $@convention(method) (@owned C) -> @owned C
   %6 = unchecked_ref_cast %5 : $C to $D
   store %6 to %1#1 : $*D
   dealloc_stack %1#0 : $*@local_storage D
   return %6 : $D
 }


 sil @_TF14optimize_never10transform1urFxVs5Int32 : $@convention(thin) <T> (@in T) -> Int32 {
 bb0(%0 : $*T):
   %2 = integer_literal $Builtin.Int32, 2
   %3 = struct $Int32 (%2 : $Builtin.Int32)
   destroy_addr %0 : $*T
   return %3 : $Int32
 }


 // Check that both calls are not inlined or devirtualized.
 // CHECK-LABEL: sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32
 // CHECK-NOT: checked_cast_br
 // CHECK: function_ref @_TF14optimize_never10transform1urFxVs5Int32
 // CHECK: apply
 // CHECK-NOT: checked_cast_br
 // CHECK: class_method {{%.*}} : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
 // CHECK: apply
 // CHECK: return
 sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32 : $@convention(thin) <T> (@in T, @owned C) -> Int32 {
 bb0(%0 : $*T, %1 : $C):
   %4 = function_ref @_TF14optimize_never10transform1urFxVs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
   %5 = alloc_stack $T
   copy_addr %0 to [initialization] %5#1 : $*T
   %7 = apply %4<T>(%5#1) : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
   %8 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
   %9 = apply %8(%1) : $@convention(method) (@guaranteed C) -> Int32
   %10 = struct_extract %7 : $Int32, #Int32._value
   %11 = struct_extract %9 : $Int32, #Int32._value
   %12 = integer_literal $Builtin.Int1, -1
   %13 = builtin "sadd_with_overflow_Int32"(%10 : $Builtin.Int32, %11 : $Builtin.Int32, %12 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
   %14 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 0
   %15 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 1
   cond_fail %15 : $Builtin.Int1
   %17 = struct $Int32 (%14 : $Builtin.Int32)
   dealloc_stack %5#0 : $*@local_storage T
   strong_release %1 : $C
   destroy_addr %0 : $*T
   return %17 : $Int32
 }


 sil [transparent] [fragile] @_TZFsoi1pFTVs5Int32S__S_ : $@convention(thin) (Int32, Int32) -> Int32


 // CHECK-LABEL: sil @_TF14optimize_never4boo1FCS_1CVs5Int32
 // CHECK-NOT: return
 // This call should not be inlined, because the callee is annotated with @_semantics("optimize.sil.never")
 // CHECK: function_ref @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32
 // CHECK: apply
 // CHECK: return
 sil @_TF14optimize_never4boo1FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
 bb0(%0 : $C):
   %2 = function_ref @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
   %3 = integer_literal $Builtin.Int32, 1
   %4 = struct $Int32 (%3 : $Builtin.Int32)
   %5 = alloc_stack $Int32
   store %4 to %5#1 : $*Int32
   strong_retain %0 : $C
   %8 = apply %2<Int32>(%5#1, %0) : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
   dealloc_stack %5#0 : $*@local_storage Int32
   strong_release %0 : $C
   return %8 : $Int32
 }


 sil [transparent] [fragile] @_TFSiCfT22_builtinIntegerLiteralBi2048__Si : $@convention(thin) (Builtin.Int2048, @thin Int.Type) -> Int


 sil @_TF14optimize_never10transform2FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32 {
 bb0(%0 : $Int32):
   return %0 : $Int32
 }


 // Check that both calls are not inlined or devirtualized.
 // CHECK-LABEL: sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_
 // CHECK-NOT: checked_cast_br
 // CHECK: function_ref @_TF14optimize_never10transform2FVs5Int32S0_
 // CHECK: apply
 // CHECK-NOT: checked_cast_br
 // CHECK: class_method {{%.*}} : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
 // CHECK: apply
 // CHECK: return
 sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32 {
 bb0(%0 : $Int32, %1 : $C):
   %4 = function_ref @_TF14optimize_never10transform2FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32
   %5 = apply %4(%0) : $@convention(thin) (Int32) -> Int32
   %6 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
   %7 = apply %6(%1) : $@convention(method) (@guaranteed C) -> Int32
   %8 = struct_extract %5 : $Int32, #Int32._value
   %9 = struct_extract %7 : $Int32, #Int32._value
   %10 = integer_literal $Builtin.Int1, -1
   %11 = builtin "sadd_with_overflow_Int32"(%8 : $Builtin.Int32, %9 : $Builtin.Int32, %10 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
   %12 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 0
   %13 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 1
   cond_fail %13 : $Builtin.Int1
   %15 = struct $Int32 (%12 : $Builtin.Int32)
   strong_release %1 : $C
   return %15 : $Int32
 }


 // CHECK-LABEL: sil @_TF14optimize_never4boo2FCS_1CVs5Int32
 // CHECK-NOT: return
 // This call should not be inlined, because the callee is annotated with @_semantics("optimize.sil.never")
 // CHECK: function_ref @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_
 // CHECK: apply
 // CHECK: return
 sil @_TF14optimize_never4boo2FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
 bb0(%0 : $C):
   %2 = function_ref @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32
   %3 = integer_literal $Builtin.Int32, 1
   %4 = struct $Int32 (%3 : $Builtin.Int32)
   strong_retain %0 : $C
   %6 = apply %2(%4, %0) : $@convention(thin) (Int32, @owned C) -> Int32
   strong_release %0 : $C
   return %6 : $Int32
 }

 // Check that no generic specialization was produced for foo1 because it is excluded from optimizations.
 // CHECK-NOT: generic specialization <Swift.Int> of {{.*}}.foo1
 // But foo3 was specialized, because it is not annotated with @_semantics("optimize.sil.never")
 // CHECK: generic specialization <Swift.Int32> of {{.*}}.foo3


 sil @_TF14optimize_never10transform3urFxVs5Int32 : $@convention(thin) <T> (@in T) -> Int32 {
 bb0(%0 : $*T):
   %2 = integer_literal $Builtin.Int32, 2
   %3 = struct $Int32 (%2 : $Builtin.Int32)
   destroy_addr %0 : $*T
   return %3 : $Int32
 }


 sil @_TF14optimize_never4foo3urFTxCS_1C_Vs5Int32 : $@convention(thin) <T> (@in T, @owned C) -> Int32 {
 bb0(%0 : $*T, %1 : $C):
   %4 = function_ref @_TF14optimize_never10transform3urFxVs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
   %5 = alloc_stack $T
   copy_addr %0 to [initialization] %5#1 : $*T
   %7 = apply %4<T>(%5#1) : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
   %8 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
   %9 = apply %8(%1) : $@convention(method) (@guaranteed C) -> Int32
   %10 = struct_extract %7 : $Int32, #Int32._value
   %11 = struct_extract %9 : $Int32, #Int32._value
   %12 = integer_literal $Builtin.Int1, -1
   %13 = builtin "sadd_with_overflow_Int32"(%10 : $Builtin.Int32, %11 : $Builtin.Int32, %12 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
   %14 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 0
   %15 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 1
   cond_fail %15 : $Builtin.Int1
   %17 = struct $Int32 (%14 : $Builtin.Int32)
   dealloc_stack %5#0 : $*@local_storage T
   strong_release %1 : $C
   destroy_addr %0 : $*T
   return %17 : $Int32
 }


 // Everything in this function should get devirtualized, inlined and folded together,
 // because neither this function nor any of its callees are annotated to be
 // excluded from the optimization.
 // CHECK-LABEL: sil @_TF14optimize_never4boo3FCS_1CVs5Int32
 // CHECK: bb0
 // CHECK-NOT: function_ref @_TF14optimize_never4foo3urFTxCS_1C_Vs5Int32
 // Presence of checked_cast_br indicates that the speculative devirtualization
 // was performed. And this is only possible, if the original call is inlined.
 // CHECK: checked_cast_br [exact] {{%.*}} : $C to $C, bb2, bb3
 // CHECK: return
 sil @_TF14optimize_never4boo3FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
 bb0(%0 : $C):
   %2 = function_ref @_TF14optimize_never4foo3urFTxCS_1C_Vs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
   %3 = integer_literal $Builtin.Int32, 1
   %4 = struct $Int32 (%3 : $Builtin.Int32)
   %5 = alloc_stack $Int32
   store %4 to %5#1 : $*Int32
   strong_retain %0 : $C
   %8 = apply %2<Int32>(%5#1, %0) : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
   dealloc_stack %5#0 : $*@local_storage Int32
   strong_release %0 : $C
   return %8 : $Int32
 }


 sil @_TF14optimize_never10transform4FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32 {
 bb0(%0 : $Int32):
   return %0 : $Int32
 }


 sil @_TF14optimize_never4foo4FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32 {
 bb0(%0 : $Int32, %1 : $C):
   %4 = function_ref @_TF14optimize_never10transform4FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32
   %5 = apply %4(%0) : $@convention(thin) (Int32) -> Int32
   %6 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
   %7 = apply %6(%1) : $@convention(method) (@guaranteed C) -> Int32
   %8 = struct_extract %5 : $Int32, #Int32._value
   %9 = struct_extract %7 : $Int32, #Int32._value
   %10 = integer_literal $Builtin.Int1, -1
   %11 = builtin "sadd_with_overflow_Int32"(%8 : $Builtin.Int32, %9 : $Builtin.Int32, %10 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
   %12 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 0
   %13 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 1
   cond_fail %13 : $Builtin.Int1
   %15 = struct $Int32 (%12 : $Builtin.Int32)
   strong_release %1 : $C
   return %15 : $Int32
 }


 // Everything in this function should get devirtualized and inlined,
 // because neither this function nor any of its callees are annotated to be
 // excluded from the optimization.
 // CHECK-LABEL: sil @_TF14optimize_never4boo4FCS_1CVs5Int32
 // CHECK: bb0
 // CHECK-NOT: function_ref @_TF14optimize_never4foo4FTVs5Int32CS_1C_S0_
 // Presence of checked_cast_br indicates that the speculative devirtualization
 // was performed. And this is only possible, if the original call is inlined.
 // CHECK: checked_cast_br [exact] {{%.*}} : $C to $C, bb2, bb3
 // CHECK: return
 sil @_TF14optimize_never4boo4FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
 bb0(%0 : $C):
   %2 = function_ref @_TF14optimize_never4foo4FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32
   %3 = integer_literal $Builtin.Int32, 1
   %4 = struct $Int32 (%3 : $Builtin.Int32)
   strong_retain %0 : $C
   %6 = apply %2(%4, %0) : $@convention(thin) (Int32, @owned C) -> Int32
   strong_release %0 : $C
   return %6 : $Int32
 }


 sil_vtable C {
   #C.foo!1: _TFC14optimize_never1C3foofT_Vs5Int32
   #C.deinit!deallocator: _TFC14optimize_never1CD
   #C.init!initializer.1: _TFC14optimize_never1CcfT_S0_
 }

 sil_vtable D {
   #C.foo!1: _TFC14optimize_never1D3foofT_Vs5Int32
   #C.init!initializer.1: _TFC14optimize_never1DcfT_S0_
   #D.deinit!deallocator: _TFC14optimize_never1DD
 }
	// RUN: %target-sil-opt -enable-sil-verify-all -inline -specdevirt %s \| FileCheck %s

	// Check that the @_semantics("optimize.sil.never") annotation prevents
	// any optimizations of the annotated function:
	// - No functions are inlined into the annotated function.
	// - No calls are devirtualized in the body of the annotated function.
	// - No generic specializations of the annotated function are generated.
	// - The annotated function is not inlined into any other function.

	sil_stage canonical

	import Builtin
	import Swift
	import SwiftShims

	public class C {
	@inline(never) func foo() -> Int32
	deinit
	init()
	}

	public class D : C {
	@inline(never) override func foo() -> Int32
	deinit
	override init()
	}

	public func transform1<T>(x: T) -> Int32

	@_semantics("optimize.sil.never") public func foo1<T>(x: T, _ c: C) -> Int32

	public func boo1(c: C) -> Int32

	public func transform2(x: Int32) -> Int32

	@_semantics("optimize.sil.never") public func foo2(x: Int32, _ c: C) -> Int32

	public func boo2(c: C) -> Int32

	public func transform3<T>(x: T) -> Int32

	public func foo3<T>(x: T, _ c: C) -> Int32

	public func boo3(c: C) -> Int32

	public func transform4(x: Int32) -> Int32

	public func foo4(x: Int32, _ c: C) -> Int32

	public func boo4(c: C) -> Int32


	sil_global [fragile] @_TZvOs7Process5_argcVs5Int32 : $Int32


	sil_global private_external [fragile] @globalinit_33_1BDF70FFC18749BAB495A73B459ED2F0_token5 : $Builtin.Word


	sil_global [fragile] @_TZvOs7Process11_unsafeArgvGSpGSpVs4Int8__ : $UnsafeMutablePointer<UnsafeMutablePointer<Int8>>



	sil hidden [noinline] @_TFC14optimize_never1C3foofT_Vs5Int32 : $@convention(method) (@guaranteed C) -> Int32 {
	bb0(%0 : $C):
	%2 = integer_literal $Builtin.Int32, 1
	%3 = struct $Int32 (%2 : $Builtin.Int32)
	return %3 : $Int32
	}


	sil [transparent] [fragile] @_TFVs5Int32CfT22_builtinIntegerLiteralBi2048__S_ : $@convention(thin) (Builtin.Int2048, @thin Int32.Type) -> Int32


	sil @_TFC14optimize_never1CD : $@convention(method) (@owned C) -> () {
	bb0(%0 : $C):
	%2 = function_ref @_TFC14optimize_never1Cd : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
	%3 = apply %2(%0) : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
	%4 = unchecked_ref_cast %3 : $Builtin.NativeObject to $C
	dealloc_ref %4 : $C
	%6 = tuple ()
	return %6 : $()
	}


	sil @_TFC14optimize_never1Cd : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject {
	bb0(%0 : $C):
	%2 = unchecked_ref_cast %0 : $C to $Builtin.NativeObject
	return %2 : $Builtin.NativeObject
	}


	sil hidden @_TFC14optimize_never1CcfT_S0_ : $@convention(method) (@owned C) -> @owned C {
	bb0(%0 : $C):
	return %0 : $C
	}


	sil hidden [noinline] @_TFC14optimize_never1D3foofT_Vs5Int32 : $@convention(method) (@guaranteed D) -> Int32 {
	bb0(%0 : $D):
	%2 = integer_literal $Builtin.Int32, 11
	%3 = struct $Int32 (%2 : $Builtin.Int32)
	return %3 : $Int32
	}


	sil @_TFC14optimize_never1DD : $@convention(method) (@owned D) -> () {
	bb0(%0 : $D):
	%2 = function_ref @_TFC14optimize_never1Dd : $@convention(method) (@guaranteed D) -> @owned Builtin.NativeObject
	%3 = apply %2(%0) : $@convention(method) (@guaranteed D) -> @owned Builtin.NativeObject
	%4 = unchecked_ref_cast %3 : $Builtin.NativeObject to $D
	dealloc_ref %4 : $D
	%6 = tuple ()
	return %6 : $()
	}


	sil @_TFC14optimize_never1Dd : $@convention(method) (@guaranteed D) -> @owned Builtin.NativeObject {
	bb0(%0 : $D):
	%2 = upcast %0 : $D to $C
	%3 = function_ref @_TFC14optimize_never1Cd : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
	%4 = apply %3(%2) : $@convention(method) (@guaranteed C) -> @owned Builtin.NativeObject
	return %4 : $Builtin.NativeObject
	}


	sil hidden @_TFC14optimize_never1DcfT_S0_ : $@convention(method) (@owned D) -> @owned D {
	bb0(%0 : $D):
	%1 = alloc_stack $D
	store %0 to %1#1 : $*D
	%3 = upcast %0 : $D to $C

	%4 = function_ref @_TFC14optimize_never1CcfT_S0_ : $@convention(method) (@owned C) -> @owned C
	%5 = apply %4(%3) : $@convention(method) (@owned C) -> @owned C
	%6 = unchecked_ref_cast %5 : $C to $D
	store %6 to %1#1 : $*D
	dealloc_stack %1#0 : $*@local_storage D
	return %6 : $D
	}


	sil @_TF14optimize_never10transform1urFxVs5Int32 : $@convention(thin) <T> (@in T) -> Int32 {
	bb0(%0 : $*T):
	%2 = integer_literal $Builtin.Int32, 2
	%3 = struct $Int32 (%2 : $Builtin.Int32)
	destroy_addr %0 : $*T
	return %3 : $Int32
	}



	// Check that both calls are not inlined or devirtualized.
	// CHECK-LABEL: sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32
	// CHECK-NOT: checked_cast_br
	// CHECK: function_ref @_TF14optimize_never10transform1urFxVs5Int32
	// CHECK: apply
	// CHECK-NOT: checked_cast_br
	// CHECK: class_method {{%.*}} : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
	// CHECK: apply
	// CHECK: return
	sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32 : $@convention(thin) <T> (@in T, @owned C) -> Int32 {
	bb0(%0 : $*T, %1 : $C):
	%4 = function_ref @_TF14optimize_never10transform1urFxVs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
	%5 = alloc_stack $T
	copy_addr %0 to [initialization] %5#1 : $*T
	%7 = apply %4<T>(%5#1) : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
	%8 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
	%9 = apply %8(%1) : $@convention(method) (@guaranteed C) -> Int32
	%10 = struct_extract %7 : $Int32, #Int32._value
	%11 = struct_extract %9 : $Int32, #Int32._value
	%12 = integer_literal $Builtin.Int1, -1
	%13 = builtin "sadd_with_overflow_Int32"(%10 : $Builtin.Int32, %11 : $Builtin.Int32, %12 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
	%14 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 0
	%15 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 1
	cond_fail %15 : $Builtin.Int1
	%17 = struct $Int32 (%14 : $Builtin.Int32)
	dealloc_stack %5#0 : $*@local_storage T
	strong_release %1 : $C
	destroy_addr %0 : $*T
	return %17 : $Int32
	}


	sil [transparent] [fragile] @_TZFsoi1pFTVs5Int32S__S_ : $@convention(thin) (Int32, Int32) -> Int32


	// CHECK-LABEL: sil @_TF14optimize_never4boo1FCS_1CVs5Int32
	// CHECK-NOT: return
	// This call should not be inlined, because the callee is annotated with @_semantics("optimize.sil.never")
	// CHECK: function_ref @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32
	// CHECK: apply
	// CHECK: return
	sil @_TF14optimize_never4boo1FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
	bb0(%0 : $C):
	%2 = function_ref @_TF14optimize_never4foo1urFTxCS_1C_Vs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
	%3 = integer_literal $Builtin.Int32, 1
	%4 = struct $Int32 (%3 : $Builtin.Int32)
	%5 = alloc_stack $Int32
	store %4 to %5#1 : $*Int32
	strong_retain %0 : $C
	%8 = apply %2<Int32>(%5#1, %0) : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
	dealloc_stack %5#0 : $*@local_storage Int32
	strong_release %0 : $C
	return %8 : $Int32
	}


	sil [transparent] [fragile] @_TFSiCfT22_builtinIntegerLiteralBi2048__Si : $@convention(thin) (Builtin.Int2048, @thin Int.Type) -> Int


	sil @_TF14optimize_never10transform2FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32 {
	bb0(%0 : $Int32):
	return %0 : $Int32
	}


	// Check that both calls are not inlined or devirtualized.
	// CHECK-LABEL: sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_
	// CHECK-NOT: checked_cast_br
	// CHECK: function_ref @_TF14optimize_never10transform2FVs5Int32S0_
	// CHECK: apply
	// CHECK-NOT: checked_cast_br
	// CHECK: class_method {{%.*}} : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
	// CHECK: apply
	// CHECK: return
	sil [_semantics "optimize.sil.never"] @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32 {
	bb0(%0 : $Int32, %1 : $C):
	%4 = function_ref @_TF14optimize_never10transform2FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32
	%5 = apply %4(%0) : $@convention(thin) (Int32) -> Int32
	%6 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
	%7 = apply %6(%1) : $@convention(method) (@guaranteed C) -> Int32
	%8 = struct_extract %5 : $Int32, #Int32._value
	%9 = struct_extract %7 : $Int32, #Int32._value
	%10 = integer_literal $Builtin.Int1, -1
	%11 = builtin "sadd_with_overflow_Int32"(%8 : $Builtin.Int32, %9 : $Builtin.Int32, %10 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
	%12 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 0
	%13 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 1
	cond_fail %13 : $Builtin.Int1
	%15 = struct $Int32 (%12 : $Builtin.Int32)
	strong_release %1 : $C
	return %15 : $Int32
	}


	// CHECK-LABEL: sil @_TF14optimize_never4boo2FCS_1CVs5Int32
	// CHECK-NOT: return
	// This call should not be inlined, because the callee is annotated with @_semantics("optimize.sil.never")
	// CHECK: function_ref @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_
	// CHECK: apply
	// CHECK: return
	sil @_TF14optimize_never4boo2FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
	bb0(%0 : $C):
	%2 = function_ref @_TF14optimize_never4foo2FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32
	%3 = integer_literal $Builtin.Int32, 1
	%4 = struct $Int32 (%3 : $Builtin.Int32)
	strong_retain %0 : $C
	%6 = apply %2(%4, %0) : $@convention(thin) (Int32, @owned C) -> Int32
	strong_release %0 : $C
	return %6 : $Int32
	}

	// Check that no generic specialization was produced for foo1 because it is excluded from optimizations.
	// CHECK-NOT: generic specialization <Swift.Int> of {{.*}}.foo1
	// But foo3 was specialized, because it is not annotated with @_semantics("optimize.sil.never")
	// CHECK: generic specialization <Swift.Int32> of {{.*}}.foo3


	sil @_TF14optimize_never10transform3urFxVs5Int32 : $@convention(thin) <T> (@in T) -> Int32 {
	bb0(%0 : $*T):
	%2 = integer_literal $Builtin.Int32, 2
	%3 = struct $Int32 (%2 : $Builtin.Int32)
	destroy_addr %0 : $*T
	return %3 : $Int32
	}


	sil @_TF14optimize_never4foo3urFTxCS_1C_Vs5Int32 : $@convention(thin) <T> (@in T, @owned C) -> Int32 {
	bb0(%0 : $*T, %1 : $C):
	%4 = function_ref @_TF14optimize_never10transform3urFxVs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
	%5 = alloc_stack $T
	copy_addr %0 to [initialization] %5#1 : $*T
	%7 = apply %4<T>(%5#1) : $@convention(thin) <τ_0_0> (@in τ_0_0) -> Int32
	%8 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
	%9 = apply %8(%1) : $@convention(method) (@guaranteed C) -> Int32
	%10 = struct_extract %7 : $Int32, #Int32._value
	%11 = struct_extract %9 : $Int32, #Int32._value
	%12 = integer_literal $Builtin.Int1, -1
	%13 = builtin "sadd_with_overflow_Int32"(%10 : $Builtin.Int32, %11 : $Builtin.Int32, %12 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
	%14 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 0
	%15 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 1
	cond_fail %15 : $Builtin.Int1
	%17 = struct $Int32 (%14 : $Builtin.Int32)
	dealloc_stack %5#0 : $*@local_storage T
	strong_release %1 : $C
	destroy_addr %0 : $*T
	return %17 : $Int32
	}


	// Everything in this function should get devirtualized, inlined and folded together,
	// because neither this function nor any of its callees are annotated to be
	// excluded from the optimization.
	// CHECK-LABEL: sil @_TF14optimize_never4boo3FCS_1CVs5Int32
	// CHECK: bb0
	// CHECK-NOT: function_ref @_TF14optimize_never4foo3urFTxCS_1C_Vs5Int32
	// Presence of checked_cast_br indicates that the speculative devirtualization
	// was performed. And this is only possible, if the original call is inlined.
	// CHECK: checked_cast_br [exact] {{%.*}} : $C to $C, bb2, bb3
	// CHECK: return
	sil @_TF14optimize_never4boo3FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
	bb0(%0 : $C):
	%2 = function_ref @_TF14optimize_never4foo3urFTxCS_1C_Vs5Int32 : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
	%3 = integer_literal $Builtin.Int32, 1
	%4 = struct $Int32 (%3 : $Builtin.Int32)
	%5 = alloc_stack $Int32
	store %4 to %5#1 : $*Int32
	strong_retain %0 : $C
	%8 = apply %2<Int32>(%5#1, %0) : $@convention(thin) <τ_0_0> (@in τ_0_0, @owned C) -> Int32
	dealloc_stack %5#0 : $*@local_storage Int32
	strong_release %0 : $C
	return %8 : $Int32
	}


	sil @_TF14optimize_never10transform4FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32 {
	bb0(%0 : $Int32):
	return %0 : $Int32
	}


	sil @_TF14optimize_never4foo4FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32 {
	bb0(%0 : $Int32, %1 : $C):
	%4 = function_ref @_TF14optimize_never10transform4FVs5Int32S0_ : $@convention(thin) (Int32) -> Int32
	%5 = apply %4(%0) : $@convention(thin) (Int32) -> Int32
	%6 = class_method %1 : $C, #C.foo!1 : C -> () -> Int32 , $@convention(method) (@guaranteed C) -> Int32
	%7 = apply %6(%1) : $@convention(method) (@guaranteed C) -> Int32
	%8 = struct_extract %5 : $Int32, #Int32._value
	%9 = struct_extract %7 : $Int32, #Int32._value
	%10 = integer_literal $Builtin.Int1, -1
	%11 = builtin "sadd_with_overflow_Int32"(%8 : $Builtin.Int32, %9 : $Builtin.Int32, %10 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
	%12 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 0
	%13 = tuple_extract %11 : $(Builtin.Int32, Builtin.Int1), 1
	cond_fail %13 : $Builtin.Int1
	%15 = struct $Int32 (%12 : $Builtin.Int32)
	strong_release %1 : $C
	return %15 : $Int32
	}


	// Everything in this function should get devirtualized and inlined,
	// because neither this function nor any of its callees are annotated to be
	// excluded from the optimization.
	// CHECK-LABEL: sil @_TF14optimize_never4boo4FCS_1CVs5Int32
	// CHECK: bb0
	// CHECK-NOT: function_ref @_TF14optimize_never4foo4FTVs5Int32CS_1C_S0_
	// Presence of checked_cast_br indicates that the speculative devirtualization
	// was performed. And this is only possible, if the original call is inlined.
	// CHECK: checked_cast_br [exact] {{%.*}} : $C to $C, bb2, bb3
	// CHECK: return
	sil @_TF14optimize_never4boo4FCS_1CVs5Int32 : $@convention(thin) (@owned C) -> Int32 {
	bb0(%0 : $C):
	%2 = function_ref @_TF14optimize_never4foo4FTVs5Int32CS_1C_S0_ : $@convention(thin) (Int32, @owned C) -> Int32
	%3 = integer_literal $Builtin.Int32, 1
	%4 = struct $Int32 (%3 : $Builtin.Int32)
	strong_retain %0 : $C
	%6 = apply %2(%4, %0) : $@convention(thin) (Int32, @owned C) -> Int32
	strong_release %0 : $C
	return %6 : $Int32
	}


	sil_vtable C {
	#C.foo!1: _TFC14optimize_never1C3foofT_Vs5Int32
	#C.deinit!deallocator: _TFC14optimize_never1CD
	#C.init!initializer.1: _TFC14optimize_never1CcfT_S0_
	}

	sil_vtable D {
	#C.foo!1: _TFC14optimize_never1D3foofT_Vs5Int32
	#C.init!initializer.1: _TFC14optimize_never1DcfT_S0_
	#D.deinit!deallocator: _TFC14optimize_never1DD
	}