Use a decent sentinel value for reference poison #37753
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Only relevant for -Xfrontend -enable-copy-propagation in debug builds. It's only an experimental mode for now for shrinking lifetimes while providing lldb an easy way to report a friendly error. Goals: - two repetitive digits that don't look like garbage - less than a page, so it can never be a real pointer - reserve as many low bits as possible so it can't be a tagged pointer - not used by any other memory smashers 0x440 is 64-byte aligned which is plenty for any conceivable object allocator.
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adrian-prantl
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Jun 3, 2021
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Only relevant for -Xfrontend -enable-copy-propagation in debug builds.
It's only an experimental mode for now for shrinking lifetimes while
providing lldb an easy way to report a friendly error.
Goals:
0x440 is 64-byte aligned which is plenty for any conceivable object
allocator.