/* PR rtl-optimization/51924 */ /* Testcase by Zdenek Sojka */ /* { dg-do run } */ /* { dg-options "-O -free -fno-rename-registers -ftree-vectorize -funroll-loops" } */ typedef __UINT64_TYPE__ uint64_t; uint64_t __attribute__ ((noinline, noclone)) bn_sub_words (uint64_t * r, const uint64_t * a, const uint64_t * b, int n) { uint64_t t1, t2; unsigned c = 0; while (n) { t1 = a[0]; t2 = b[0]; r[0] = (t1 - t2 - c); if (t1 != t2) c = (t1 < t2); a++; b++; r++; n--; } return (c); } int main (void) { uint64_t r[2]; uint64_t a[2] = { -1, -1 }; uint64_t b[2] = { 0, 0 }; if (bn_sub_words (r, a, b, 2) != 0) __builtin_abort (); return 0; }