[Bug target/100375] [12 Regression] trunk 20210501 ftbfs for nvptx-none

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100375

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
What type is pseudo_node_t? If the pair members are pointers, use nullptr not
0.