https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67024
Bug ID: 67024
Summary: IPA SRA removes tail-call opportunities
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
CC: jamborm at gcc dot gnu.org
Target Milestone: ---
In gimple/generic-match.c the main dispatcher gimple_simplify () has tail-calls
to workers that might end up not needing one of the parameters. IPA SRA
removes those even though the resulting call is now more expensive than
with keeping the paramters inplace.
An issue might be that tail-call discovery only runs after IPA SRA.
