/* PR tree-optimization/61839. */ /* { dg-do compile } */ /* Disable jump threading, we want to avoid separating the division/modulo by zero paths - we'd isolate those only later. */ /* { dg-options "-O2 -fno-thread-jumps -fdump-tree-evrp" } */ /* { dg-require-effective-target int32plus } */ __attribute__ ((noinline)) int foo () { int a = -1; volatile unsigned b = 1U; int c = 1; c = (a + 972195718) / (b ? 2 : 0); if (c == 486097858) ; else __builtin_abort (); return 0; } __attribute__ ((noinline)) int bar () { int a = -1; volatile unsigned b = 1U; int c = 1; c = (a + 972195718) % (b ? 2 : 0); if (c == 1) ; else __builtin_abort (); return 0; } __attribute__ ((noinline)) int bar2 () { int a = -1; volatile unsigned b = 1U; int c = 1; c = (a + 972195716) % (b ? 1 : 2); if (c == 0) ; else __builtin_abort (); return 0; } /* Ensure we are folding modulus sub-ranges properly. */ __attribute__ ((noinline)) int mod (int a, int b) { int v1, v2; v1 = (a < 10) ? 12 : 24; v2 = (b > 20) ? 3 : 6; if (a > 20) v1 = v1 * 2; if (b > 20) v2 = v2 * 2; if (a == b) v2 = 0; /* v1 == 12, 24, or 48. v2 == 0, 3, 6, or 12. */ int c = v1 % v2; if (c == 0) ; else __builtin_abort (); return 0; } /* EVRP now makes transformations in all functions, leaving a single * builtin_abort call in bar2. */ /* { dg-final { scan-tree-dump-times "__builtin_abort" 1 "evrp" } } */ /* Make sure to optimize 972195717 / 0 in function foo. */ /* { dg-final { scan-tree-dump-times "972195717 / " 0 "evrp" } } */ /* Make sure to optimize 972195717 % 0 in function bar. */ /* { dg-final { scan-tree-dump-times "972195717 % " 0 "evrp" } } */ /* Make sure to optimize 972195717 % [1,2] function bar2. */ /* { dg-final { scan-tree-dump-times "972195715 % " 0 "evrp" } } */ /* [12,12][24,24][48,48] % [0,0][3,3][6,6][12,12] == [0,0] */ /* { dg-final { scan-tree-dump-times "%" 0 "evrp" } } */