https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113780
Bug ID: 113780
Summary: [ARM] Incorrect indirect tailcall generated for
PAC-enabled function.
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: belagod at gcc dot gnu.org
Target Milestone: ---
For this piece of code:
void fail(void (*f)(int, int, int, int))
{
f(1, 2, 3, 4);
}
compiled with -mcpu=cortex-m85 -mbranch-protection=pac-ret+leaf -O2 on trunk,
it generates:
fail:
pac ip, lr, sp
movs r3, #4
movs r2, #3
movs r1, #2
movs r0, #1
push {ip, lr}
pop {ip, lr}
aut ip, lr, sp
bx ip @ indirect register sibling call
