47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/* { dg-do compile } */
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/* { dg-require-effective-target alloca } */
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/* { dg-options "-Walloca-larger-than=2000 -O2" } */
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void f (void *);
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void
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g1 (int n)
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{
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void *p;
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if (n > 0 && n < 2000)
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// FIXME: This is a bogus warning, and is currently happening on
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// 32-bit targets because VRP is not giving us any range info for
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// the argument to __builtin_alloca. This should be fixed by the
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// upcoming range work.
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p = __builtin_alloca (n); // { dg-bogus "unbounded use of 'alloca'" "" { xfail { ! lp64 } } }
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else
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p = __builtin_malloc (n);
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f (p);
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}
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void
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g2 (int n)
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{
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void *p;
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if (n < 2000)
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p = __builtin_alloca (n); // { dg-warning "large due to conversion" }
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else
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p = __builtin_malloc (n);
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f (p);
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}
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void
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g3 (int n)
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{
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void *p;
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if (n > 0 && n < 3000)
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{
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p = __builtin_alloca (n); // { dg-warning "'alloca' may be too large" "" { target lp64} }
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// { dg-message "note:.*argument may be as large as 2999" "note" { target lp64 } .-1 }
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// { dg-warning "unbounded use of 'alloca'" "" { target { ! lp64 } } .-2 }
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}
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else
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p = __builtin_malloc (n);
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f (p);
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}
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