[Bug rtl-optimization/115912] [15 regression] Harfbuzz testsuite fails (mvar_partial_instance test) since r15-1901-g98914f9eba5f19

[law at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115912

--- Comment #22 from Jeffrey A. Law <law at gcc dot gnu.org> ---
I'm going to need Stephan to do a bit of debugging on that s390x failure. 
ext-dce isn't doing anything with that test on s390.