https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81214
Bug ID: 81214
Summary: GCC target_clone support does not work for global
functions with no references
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 41633
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41633&action=edit
Test case.
If you define a global target_clone function but there are no references to it,
because the references will be in another file, the compiler deletes the ifunc
entry and the ifunc resolver function, but it leaves the target clone functions
(which no longer have references to them once the resolver function was
deleted).
The following is the NM output from the attached file compiled with -O3:
$ file="test-x86-clone3"; ~/fsf-install-x86_64/trunk-249567-x86_64/bin/gcc -O3
-save-temps -c $file.c && nm $file.o
00000000000001b0 t vadd.arch_core_avx2.2.default.3
0000000000000150 t vadd.arch_slm.1.default.4
0000000000000060 t vadd.avx.0.default.5
0000000000000000 T vadd.default.6
