[Bug rtl-optimization/3507] appalling optimisation with sub/cmp on multiple targets

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3507

--- Comment #69 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #68)
>  ;; Subtract instructions
>  
> -(define_expand "sub<mode>3"
> +(define_expand "*sub<mode>3"

Eh,

-(define_expand "sub<mode>3"
+(define_expand "old_sub<mode>3"