How to report code generation weirdness

Tue Mar 20 23:06:23 UTC 2018

How do I report some extremely weird (useless) code generated by 
GDC when the -O3 option is used? (bizarre rats’ nest of 
conditional jumps). [I am an experienced professional asm 
programmer, now retired.]

The D source is short, fortunately. The asm output I am looking 
at is seen through the telescope that is Matt GodBolt’s Compiler 
Explorer at http://explore.dgnu.org so I possibly would want to 
pull the asm text from that site (somehow).