https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91684
Bug ID: 91684
Summary: [10 regression][ARM] ICE in gen_movdi, at
config/arm/arm.md:5079
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: wilco at gcc dot gnu.org
Target Milestone: ---
The following small example fails with an ICE with -mcpu=cortex-a57:
typedef struct { int a, b, c; } S;
void g (S *s);
void bug1 (void)
{
S s;
__builtin_memset (&s, 0, sizeof (S));
g (&s);
}
bug1.c:30:3: internal compiler error: in gen_movdi, at config/arm/arm.md:5079
30 | __builtin_memset (&s, 0, sizeof (S));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0xb9b8d9 gen_movdi(rtx_def*, rtx_def*)
This appears due to recent changes in alignment on Arm.
