Disable loading scalars as addresses when materializing an entity var…

lldb/source/Expression/Materializer.cpp

@@ -489,10 +489,7 @@ class EntityVariable : public Materializer::Entity {
       }
     } else {
       AddressType address_type = eAddressTypeInvalid;
-      const bool scalar_is_load_address = m_is_generic; // this is the only
-                                                          // time we're dealing
-                                                          // with dynamic values
-
+      const bool scalar_is_load_address = false;
       lldb::addr_t addr_of_valobj =
           valobj_sp->GetAddressOf(scalar_is_load_address, &address_type);
 

lldb/test/API/lang/swift/expression/class_constrained_protocol/TestClassConstrainedProtocol.py

@@ -24,7 +24,6 @@ def test_extension_weak_self (self):
         self.do_self_test("Break here for weak self")
 
     @swiftTest
-    @expectedFailureAll(oslist=["linux"], bugnumber="rdar://31822722")
     def test_extension_self (self):
         """Test that we can reconstruct self in method of a class constrained protocol."""
         self.build()

lldb/test/API/lang/swift/expression/self_from_register/Makefile

@@ -0,0 +1,3 @@
+SWIFT_SOURCES := main.swift
+
+include Makefile.rules

lldb/test/API/lang/swift/expression/self_from_register/TestSelfFromRegister.py

@@ -0,0 +1,17 @@
+# TestSelfFromRegister.py
+#
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See https://swift.org/LICENSE.txt for license information
+# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#
+# ------------------------------------------------------------------------------
+
+import lldbsuite.test.lldbinline as lldbinline
+from lldbsuite.test.decorators import *
+
+# Test that loading self from a register works as expected
+lldbinline.MakeInlineTest(__file__, globals(), decorators=[swiftTest])

lldb/test/API/lang/swift/expression/self_from_register/main.swift

@@ -0,0 +1,13 @@
+class C : CP {
+  let f: Int = 12345
+}
+
+protocol CP : class {}
+
+extension CP {
+  func foo() {
+    print(self)  //% self.expect('e f', substrs=[' = 12345'])
+  }
+}
+
+C().foo()