[Bug sanitizer/63855] [5 Regression] ICE: SIGSEGV in ipa_comdats with -fsanitize=null

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63855

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r213406.