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111
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1 /* PR 30457 warn about va_start(ap, invalid) */
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2 /* { dg-do compile } */
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3 /* { dg-options "-std=c99" } */
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4
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5 /* Undefined by C99 7.15.1.4p4 (va_start):
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6 "If the parameter parmN is declared with the register storage
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7 class, with a function or array type, or with a type that is
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8 not compatible with the type that results after application of
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9 the default argument promotions, the behavior is undefined." */
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10
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11 #include <stdarg.h>
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12
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13 void foo(register short paramN, ...)
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14 {
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15 va_list ap;
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16
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17 va_start(ap, paramN); /* { dg-warning "undefined behavior when second parameter of 'va_start' is declared with 'register' storage" } */
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18
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19 /* Undefined by C99 7.15.1.1p2: */
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20 (void) va_arg(ap, char); /* { dg-warning "'char' is promoted to 'int' when passed through '...'" "promoted" } */
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21 /* { dg-message "note: .so you should pass .int. not .char. to .va_arg.." "int not char" { target *-*-* } .-1 } */
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22 /* { dg-message "note: if this code is reached, the program will abort" "will abort" { target *-*-* } .-2 } */
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23
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24 va_end(ap);
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25 }
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26
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