← Back to index | Original Bugzilla link

Bug 20991 – Optimizer is not unlining various forms of simple loops

Status: NEW
Severity: normal
Priority: P3
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2020-06-28T22:30:49Z
Last change time: 2024-12-13T19:09:48Z
Keywords: performance
Assigned to: No Owner
Creator: Walter Bright

Moved to GitHub: dmd#19736 →

Comments

Comment #0 by bugzilla — 2020-06-28T22:30:49Z

The optimizer will unroll a loop of the form: for (uint i = 0; i < 2; ++i) foo(i); but not: for (uint i = 0; i <= 1; ++i) foo(i); or loops with more complex bodies. It will not unroll more than two iterations. Should be up to 100.

Comment #1 by bugzilla — 2020-06-30T07:13:45Z

https://github.com/dlang/dmd/pull/11350

Comment #2 by bugzilla — 2020-06-30T22:57:00Z

More unrolling information: https://github.com/dlang/phobos/pull/7534

Comment #3 by bugzilla — 2020-07-06T08:07:45Z

Progress: https://github.com/dlang/dmd/pull/11378

Comment #4 by robert.schadek — 2024-12-13T19:09:48Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/19736 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB