https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127653
Bug ID: 127653
Summary: arm: Invalid offset for bf16 load/store
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: rearnsha at gcc dot gnu.org
Target Milestone: ---
Compiling the following with -marm -O0, generates invalid assembly. The offset
for the strh exceeds the range +/-255.
void sink(void *);
void f(__bf16 *p) {
char pad[300];
__bf16 x = *p;
sink(pad);
sink(&x);
}
Generates:
push {fp, lr}
add fp, sp, #4
sub sp, sp, #312
str r0, [fp, #-312]
ldr r3, [fp, #-312]
ldrh r3, [r3] @ __bf16
strh r3, [fp, #-306] @ __bf16. <- Invalid immediate offset
sub r3, fp, #304
mov r0, r3
bl sink
...
Wrong code, but has probably been like this for years.
