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D.gnu - How to report code generation weirdness

reply Cecil Ward <d cecilward.com> writes:
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).
Mar 20 2018
next sibling parent Mike Franklin <slavo5150 yahoo.com> writes:
On Tuesday, 20 March 2018 at 23:06:23 UTC, Cecil Ward wrote:

 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).


Bugs can be filed at https://bugzilla.gdcproject.org/

Mike
Mar 20 2018
prev sibling parent Johannes Pfau <nospam example.com> writes:
Am Tue, 20 Mar 2018 23:06:23 +0000 schrieb Cecil Ward:


 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).



Just post the link in your bug report on bugzilla.gdcproject.org. 
Preferably also attach the source code and asm as files, for archiving 
purposes. Or if the source and asm is short enough simply post it inline.

-- 
Johannes
Mar 22 2018