[Lldb-commits] [lldb] [lldb] [ObjC runtime] Don't cast to signed when left shifting (PR #86605)

[Alex Langford via lldb-commits]

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@@ -3154,7 +3154,7 @@ AppleObjCRuntimeV2::TaggedPointerVendorExtended::GetClassDescriptor(
                             << m_objc_debug_taggedpointer_ext_payload_lshift) >>
                            m_objc_debug_taggedpointer_ext_payload_rshift);
   int64_t data_payload_signed =
-      ((int64_t)((int64_t)unobfuscated
+      ((int64_t)((uint64_t)unobfuscated
                  << m_objc_debug_taggedpointer_ext_payload_lshift) >>
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bulbazord wrote:

Since the goal is to extract some bits from the middle of this 64-bit value, is there a way we could produce a mask instead of shifting left and then shifting right?

https://github.com/llvm/llvm-project/pull/86605