Enable a bunch of IRGen tests that are x86 only for arm64 too (#40304)

Author: kubamracek

test/IRGen/closure.swift

@@ -2,7 +2,7 @@
 // RUN: %target-swift-frontend -primary-file %s -emit-ir | %FileCheck %s --check-prefix=CAPTURE
 // RUN: %target-swift-frontend -primary-file %s -O -emit-ir | %FileCheck %s --check-prefix=OPT
 
-// REQUIRES: CPU=x86_64
+// REQUIRES: PTRSIZE=64
 
 // CHECK-DAG: [[FILENAME:@[0-9]+]] = {{.*}} c"{{.*}}closure.swift\00"
 // OPT: [[FILENAME:@[0-9]+]] = {{.*}} [1 x i8] zeroinitializer

test/IRGen/expressions.swift

@@ -1,6 +1,6 @@
 // RUN: %target-swift-frontend -primary-file %s -emit-ir -parse-stdlib -disable-access-control | %FileCheck %s
 
-// REQUIRES: CPU=x86_64
+// REQUIRES: PTRSIZE=64
 
 import Swift
 

test/IRGen/objc_attr_NSManaged.sil

@@ -2,7 +2,7 @@
 // RUN: %build-irgen-test-overlays
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/Inputs -I %t) %s -emit-ir | %FileCheck %s
 
-// REQUIRES: CPU=x86_64
+// REQUIRES: PTRSIZE=64
 // REQUIRES: objc_interop
 
 // CHECK: [[SGIZMO:%T19objc_attr_NSManaged10SwiftGizmoC]] = type

test/IRGen/objc_bridge.swift

@@ -2,7 +2,7 @@
 // RUN: %build-irgen-test-overlays
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/Inputs -I %t) -emit-ir -primary-file %s | %FileCheck %s
 
-// REQUIRES: CPU=x86_64
+// REQUIRES: PTRSIZE=64
 // REQUIRES: objc_interop
 
 import Foundation

test/IRGen/objc_protocols.swift

@@ -3,7 +3,7 @@
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/Inputs -I %t) -emit-module -o %t %S/Inputs/objc_protocols_Bas.swift
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/Inputs -I %t) -primary-file %s -emit-ir -disable-objc-attr-requires-foundation-module | %FileCheck %s
 
-// REQUIRES: CPU=x86_64
+// REQUIRES: PTRSIZE=64
 // REQUIRES: objc_interop
 
 import gizmo

test/IRGen/objc_subscripts.swift

@@ -1,6 +1,6 @@
 // RUN: %target-swift-frontend -primary-file %s -emit-ir -enable-objc-interop -disable-objc-attr-requires-foundation-module | %FileCheck %s
 
-// REQUIRES: CPU=x86_64
+// REQUIRES: PTRSIZE=64
 
 // CHECK: [[INDEXED_GETTER_ENCODING:@.+]] = private unnamed_addr constant [11 x i8] c"@24@0:8q16\00"
 // CHECK: [[INDEXED_SETTER_ENCODING:@.+]] = private unnamed_addr constant [14 x i8] c"v32@0:8@16q24\00"