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111
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1 /* { dg-skip-if "requires alloca" { ! alloca } { "-O0" } { "" } } */
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2 /* Verify that alloca storage is sufficiently aligned. */
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3 /* ??? May fail if BIGGEST_ALIGNMENT > STACK_BOUNDARY. Which, I guess
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4 can only happen on !STRICT_ALIGNMENT targets. */
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5
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6 typedef __SIZE_TYPE__ size_t;
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7
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8 struct dummy { int x __attribute__((aligned)); };
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9 #define BIGGEST_ALIGNMENT __alignof__(struct dummy)
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10
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11 _Bool foo(void)
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12 {
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13 char *p = __builtin_alloca(32);
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14 return ((size_t)p & (BIGGEST_ALIGNMENT - 1)) == 0;
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15 }
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16
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17 int main()
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18 {
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19 if (!foo())
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20 abort ();
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21 return 0;
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22 }
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