[Issue 22115] New: Optimize if (s.a == 3 ? s : null) to if (s.a == 3)
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Sun Jul 11 06:50:23 UTC 2021
https://issues.dlang.org/show_bug.cgi?id=22115
Issue ID: 22115
Summary: Optimize if (s.a == 3 ? s : null) to if (s.a == 3)
Product: D
Version: D2
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P1
Component: dmd
Assignee: nobody at puremagic.com
Reporter: bugzilla at digitalmars.com
Currently, dmd often uses the pattern:
if (e.isAddExp())
...
isAddExp(), when inlined, becomes code like:
if (e.op == TOK.add ? cast(AddExp)this : null)
...
This doesn't get optimized to:
if (e.op == TOK.add)
It should be, in order to make using isAddExp() cost free.
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