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Bug 21007 – DMD generates unnecessary prolog/epilog for trivial functions

Status: NEW
Severity: normal
Priority: P3
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2020-07-02T00:42:42Z
Last change time: 2024-12-13T19:09:53Z
Keywords: backend, performance
Assigned to: No Owner
Creator: Walter Bright

Moved to GitHub: dmd#19739 →

Comments

Comment #0 by bugzilla — 2020-07-02T00:42:42Z

The code: int square(int num) { return num * num; } generates: push RBP mov RBP,RSP mov EAX,EDI imul EAX,EAX pop RBP ret while gdc and ldc do not generate the prolog/epilog. https://godbolt.org/z/A7EUu7

Comment #1 by robert.schadek — 2024-12-13T19:09:53Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/19739 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB