?? recip-5.c
字號(hào):
/* { dg-options "-O1 -funsafe-math-optimizations -ftrapping-math -fdump-tree-recip -fdump-tree-optimized" } *//* { dg-do compile } *//* Test the reciprocal optimizations together with trapping math. */extern int f2();double f1(double y, double z, double w, double j, double k){ double b, c, d, e, f, g; if (f2 ()) /* inserts one division here */ b = 1 / y, c = z / y, d = j / y; else /* one division here */ b = 3 / y, c = w / y, d = k / y; /* and one here, that should be removed afterwards but is not right now */ e = b / y; f = c / y; g = d / y; return e + f + g;}/* { dg-final { scan-tree-dump-times " / " 3 "recip" } } *//* { dg-final { scan-tree-dump-times " / " 2 "optimized" { xfail *-*-* } } } *//* { dg-final { cleanup-tree-dump "recip" } } *//* { dg-final { cleanup-tree-dump "optimized" } } */
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