[Bug debug/120525] [16 Regression] ICE in vartrack building glibc memusage.c for s390-linux-gnu

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120525

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
var-tracking.cc has

      if (fndecl == NULL_TREE)
        fndecl = MEM_EXPR (XEXP (call, 0));

it doesn't look right.