SILGen: Upstream back_deployed_attr_maccatalyst.swift test.

This test was missed in swiftlang#75432.

Author: tshortli

test/SILGen/back_deployed_attr_maccatalyst.swift

@@ -0,0 +1,93 @@
+// RUN: %target-swift-emit-sil -parse-as-library -module-name back_deploy %s -target %target-cpu-apple-ios13.1-macabi -verify
+// RUN: %target-swift-emit-silgen -parse-as-library -module-name back_deploy %s -target %target-cpu-apple-ios13.1-macabi | %FileCheck %s
+
+// REQUIRES: OS=macosx || OS=maccatalyst
+
+// -- Original definition of trivialFunc_macOS()
+// CHECK-LABEL: sil [ossa] @$s11back_deploy17trivialFunc_macOSyyF : $@convention(thin) () -> ()
+@backDeployed(before: macOS 10.53)
+public func trivialFunc_macOS() {}
+
+// -- Fallback definition of trivialFunc_iOS_macOS()
+// CHECK-LABEL: sil non_abi [serialized] [ossa] @$s11back_deploy019trivialFunc_iOS_macE0yyFTwB : $@convention(thin) () -> ()
+// CHECK: bb0:
+// CHECK:   [[RESULT:%.*]] = tuple ()
+// CHECK:   return [[RESULT]] : $()
+
+// -- Back deployment thunk for trivialFunc_iOS_macOS()
+// CHECK-LABEL: sil non_abi [serialized] [thunk] [ossa] @$s11back_deploy019trivialFunc_iOS_macE0yyFTwb : $@convention(thin) () -> ()
+// CHECK: bb0:
+// CHECK:   [[MAJOR:%.*]] = integer_literal $Builtin.Word, 51
+// CHECK:   [[MINOR:%.*]] = integer_literal $Builtin.Word, 1
+// CHECK:   [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
+// CHECK:   [[OSVFN:%.*]] = function_ref @$ss33_stdlib_isVariantOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
+// CHECK:   [[AVAIL:%.*]] = apply [[OSVFN]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
+// CHECK:   cond_br [[AVAIL]], [[AVAIL_BB:bb[0-9]+]], [[UNAVAIL_BB:bb[0-9]+]]
+//
+// CHECK: [[UNAVAIL_BB]]:
+// CHECK:   [[FALLBACKFN:%.*]] = function_ref @$s11back_deploy019trivialFunc_iOS_macE0yyFTwB : $@convention(thin) () -> ()
+// CHECK:   {{%.*}} = apply [[FALLBACKFN]]() : $@convention(thin) () -> ()
+// CHECK:   br [[RETURN_BB:bb[0-9]+]]
+//
+// CHECK: [[AVAIL_BB]]:
+// CHECK:   [[ORIGFN:%.*]] = function_ref @$s11back_deploy019trivialFunc_iOS_macE0yyF : $@convention(thin) () -> ()
+// CHECK:   {{%.*}} = apply [[ORIGFN]]() : $@convention(thin) () -> ()
+// CHECK:   br [[RETURN_BB]]
+//
+// CHECK: [[RETURN_BB]]
+// CHECK:   [[RESULT:%.*]] = tuple ()
+// CHECK:   return [[RESULT]] : $()
+
+// -- Original definition of trivialFunc_iOS_macOS()
+// CHECK-LABEL: sil [available 51.1] [ossa] @$s11back_deploy019trivialFunc_iOS_macE0yyF : $@convention(thin) () -> ()
+@backDeployed(before: iOS 51.1, macOS 10.53)
+public func trivialFunc_iOS_macOS() {}
+
+// -- Fallback definition of trivialFunc_iOS_macOS_macCatalyst()
+// CHECK-LABEL: sil non_abi [serialized] [ossa] @$s11back_deploy019trivialFunc_iOS_mace1_F8CatalystyyFTwB : $@convention(thin) () -> ()
+// CHECK: bb0:
+// CHECK:   [[RESULT:%.*]] = tuple ()
+// CHECK:   return [[RESULT]] : $()
+
+// -- Back deployment thunk for trivialFunc_iOS_macOS_macCatalyst()
+// CHECK-LABEL: sil non_abi [serialized] [thunk] [ossa] @$s11back_deploy019trivialFunc_iOS_mace1_F8CatalystyyFTwb : $@convention(thin) () -> ()
+// CHECK: bb0:
+// CHECK:   [[MAJOR:%.*]] = integer_literal $Builtin.Word, 53
+// CHECK:   [[MINOR:%.*]] = integer_literal $Builtin.Word, 2
+// CHECK:   [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
+// CHECK:   [[OSVFN:%.*]] = function_ref @$ss33_stdlib_isVariantOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
+// CHECK:   [[AVAIL:%.*]] = apply [[OSVFN]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
+// CHECK:   cond_br [[AVAIL]], [[AVAIL_BB:bb[0-9]+]], [[UNAVAIL_BB:bb[0-9]+]]
+//
+// CHECK: [[UNAVAIL_BB]]:
+// CHECK:   [[FALLBACKFN:%.*]] = function_ref @$s11back_deploy019trivialFunc_iOS_mace1_F8CatalystyyFTwB : $@convention(thin) () -> ()
+// CHECK:   {{%.*}} = apply [[FALLBACKFN]]() : $@convention(thin) () -> ()
+// CHECK:   br [[RETURN_BB:bb[0-9]+]]
+//
+// CHECK: [[AVAIL_BB]]:
+// CHECK:   [[ORIGFN:%.*]] = function_ref @$s11back_deploy019trivialFunc_iOS_mace1_F8CatalystyyF : $@convention(thin) () -> ()
+// CHECK:   {{%.*}} = apply [[ORIGFN]]() : $@convention(thin) () -> ()
+// CHECK:   br [[RETURN_BB]]
+//
+// CHECK: [[RETURN_BB]]
+// CHECK:   [[RESULT:%.*]] = tuple ()
+// CHECK:   return [[RESULT]] : $()
+
+// -- Original definition of trivialFunc_iOS_macOS_macCatalyst()
+// CHECK-LABEL: sil [available 53.2] [ossa] @$s11back_deploy019trivialFunc_iOS_mace1_F8CatalystyyF : $@convention(thin) () -> ()
+@backDeployed(before: iOS 51.1, macOS 10.53, macCatalyst 53.2)
+public func trivialFunc_iOS_macOS_macCatalyst() {}
+
+// CHECK-LABEL: sil hidden [ossa] @$s11back_deploy6calleryyF : $@convention(thin) () -> ()
+func caller() {
+  // -- Verify the thunk is not called
+  // The function is not back deployed on iOS so it should be called directly.
+  // CHECK: {{%.*}} = function_ref @$s11back_deploy17trivialFunc_macOSyyF : $@convention(thin) () -> ()
+  trivialFunc_macOS()
+
+  // -- Verify the thunk is called
+  // CHECK: {{%.*}} = function_ref @$s11back_deploy019trivialFunc_iOS_macE0yyFTwb : $@convention(thin) () -> ()
+  trivialFunc_iOS_macOS()
+  // CHECK: {{%.*}} = function_ref @$s11back_deploy019trivialFunc_iOS_mace1_F8CatalystyyFTwb : $@convention(thin) () -> ()
+  trivialFunc_iOS_macOS_macCatalyst()
+}