https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83046
--- Comment #11 from Tom de Vries <vries at gcc dot gnu.org> ---
Rewriting the test-case like this triggers the ICE without -Wreturn-type being
active:
...
/* { dg-do run { target openacc_nvidia_accel_selected } } */
/* This code uses nvptx inline assembly guarded with acc_on_device, which is
not optimized away at -O0, and then confuses the target assembler.
{ dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
#include <assert.h>
#include <openacc.h>
#define N 100
#define GANG_ID(I) \
(acc_on_device (acc_device_nvidia) \
? ({unsigned __r; \
__asm__ volatile ("mov.u32 %0,%%ctaid.x;" : "=r" (__r)); \
__r; }) : (I))
int
main ()
{
int a[N];
int i, x;
int c;
c = 1;
#pragma acc parallel loop gang (static:*) num_gangs (10)
for (i = 0; i < 100; i++)
a[i] = GANG_ID (i);
if (c)
__builtin_unreachable ();
#pragma acc parallel loop gang (static:1) num_gangs (10)
for (i = 0; i < 100; i++)
a[i] = GANG_ID (i);
return 0;
}
...
