/* 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 #define N (32*32*32+17) int main () { int ix; int ondev = 0; int t = 0, h = 0; #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) copy(ondev) { #pragma acc loop gang worker vector reduction(+:t) for (unsigned ix = 0; ix < N; ix++) { int val = ix; if (__builtin_acc_on_device (5)) { int g = 0, w = 0, v = 0; __asm__ volatile ("mov.u32 %0,%%ctaid.x;" : "=r" (g)); __asm__ volatile ("mov.u32 %0,%%tid.y;" : "=r" (w)); __asm__ volatile ("mov.u32 %0,%%tid.x;" : "=r" (v)); val = (g << 16) | (w << 8) | v; ondev = 1; } t += val; } } for (ix = 0; ix < N; ix++) { int val = ix; if(ondev) { int chunk_size = (N + 32*32*32 - 1) / (32*32*32); int g = ix / (chunk_size * 32 * 32); int w = ix / 32 % 32; int v = ix % 32; val = (g << 16) | (w << 8) | v; } h += val; } if (t != h) { printf ("t=%x expected %x\n", t, h); return 1; } return 0; }