https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92697
Bug ID: 92697
Summary: IPA-SRA modifies ifunc_resolvers
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: jamborm at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 47381
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47381&action=edit
testcase
In the attached testcase, IPA-SRA thinks that an ifunc resolver
(meanwhile IPA-split into two functions) function can be changed and
so goes ahead. The cgraph machinery then however throws away the new
clone of the caller instead of the "old" caller and inliner inlines
the clone of the ".part" function into the original resolver, which
results into an interesting miscompilation because IPA-SRA counted on
that both the caller and the callee are modified.
In any event, changing the signature of an ifunc resolver must not be
done.
