📄 pr19210-1.c
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/* { dg-do compile } *//* { dg-options "-O2 -Wunsafe-loop-optimizations" } */extern void g(void);voidf (unsigned n){ unsigned k; for(k = 0;k <= n;k++) /* { dg-warning "cannot optimize.*infinite loops" } */ g(); for(k = 0;k <= n;k += 4) /* { dg-warning "cannot optimize.*overflow" } */ g(); for(k = 5;k <= n;k += 5) /* { dg-warning "cannot optimize.*overflow" } */ g(); for(k = 15;k >= n;k--) /* { dg-warning "cannot optimize.*infinite" } */ g();}
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