Fix a Linux test given we are better at simplifying mark_dependence base values.

Author: gottesmm

test/SILOptimizer/pointer_conversion_linux.swift

@@ -27,9 +27,11 @@ public func testOptionalArray() {
   // CHECK:   switch_enum {{.*}}, case #Optional.some!enumelt: [[SOME_BB:bb[0-9]+]], case #Optional.none!enumelt: [[NONE_BB:bb[0-9]+]]
 
   // CHECK: [[SOME_BB]](
-  // CHECK: [[OWNER:%.+]] = enum $Optional<AnyObject>, #Optional.some!enumelt,
+  // CHECK: [[ORIGINAL_OWNER:%.*]] = struct_extract {{%.*}} : $_ContiguousArrayBuffer<Int>, #_ContiguousArrayBuffer._storage
+  // CHECK: [[ORIGINAL_OWNER_EXISTENTIAL:%.*]] = init_existential_ref [[ORIGINAL_OWNER]]
+  // CHECK: [[OWNER:%.+]] = enum $Optional<AnyObject>, #Optional.some!enumelt, [[ORIGINAL_OWNER_EXISTENTIAL]]
   // CHECK-NEXT: [[POINTER:%.+]] = struct $UnsafeRawPointer (
-  // CHECK-NEXT: [[DEP_POINTER:%.+]] = mark_dependence [[POINTER]] : $UnsafeRawPointer on [[OWNER]] : $Optional<AnyObject>
+  // CHECK-NEXT: [[DEP_POINTER:%.+]] = mark_dependence [[POINTER]] : $UnsafeRawPointer on [[ORIGINAL_OWNER]]
   // CHECK-NEXT: [[OPT_POINTER:%.+]] = enum $Optional<UnsafeRawPointer>, #Optional.some!enumelt, [[DEP_POINTER]]
   // CHECK-NEXT: br [[CALL_BRANCH:bb[0-9]+]]([[OPT_POINTER]] : $Optional<UnsafeRawPointer>, [[OWNER]] : $Optional<AnyObject>)