← Back to index | Original Bugzilla link

Bug 22116 – optimize values based on prior comparisons

Status: NEW
Severity: enhancement
Priority: P4
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2021-07-11T18:18:50Z
Last change time: 2024-12-13T19:17:34Z
Keywords: backend, performance
Assigned to: No Owner
Creator: Walter Bright

Moved to GitHub: dmd#19960 →

Comments

Comment #0 by bugzilla — 2021-07-11T18:18:50Z

Consider: bool b = (a == 3) ? a : 0; which can be replaced with: bool b = (a == 3); The idea is to do data flow analysis and note that `a` has the value of 3 or !=3 when on a leg of a conditional code path.

Comment #1 by robert.schadek — 2024-12-13T19:17:34Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/19960 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB