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Bug 19310 – VRP for array casts

Status: NEW
Severity: enhancement
Priority: P4
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2018-10-18T09:47:47Z
Last change time: 2024-12-13T19:00:58Z
Keywords: performance
Assigned to: No Owner
Creator: anonymous4

Moved to GitHub: dmd#19497 →

Comments

Comment #0 by dfj1esp02 — 2018-10-18T09:47:47Z

long[] f(byte[] a) { return cast(long[])a[0..a.length/8*8]; } Here the compiler can see that the array length is multiple of 8 and simply divide the length by 8 for the cast.

Comment #1 by robert.schadek — 2024-12-13T19:00:58Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/19497 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB