forked from OSchip/llvm-project
115 lines
4.1 KiB
C
115 lines
4.1 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify %s -triple i386-pc-unknown
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// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-apple-darwin9
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// RUN: %clang_cc1 -fsyntax-only -fms-compatibility -DMS -verify %s -triple x86_64-pc-win32
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void f1(int a)
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{
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__builtin_va_list ap;
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__builtin_va_start(ap, a, a); // expected-error {{too many arguments to function}}
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__builtin_va_start(ap, a); // expected-error {{'va_start' used in function with fixed args}}
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}
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void f2(int a, int b, ...)
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{
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__builtin_va_list ap;
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__builtin_va_start(ap, 10); // expected-warning {{second argument to 'va_start' is not the last named parameter}}
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__builtin_va_start(ap, a); // expected-warning {{second argument to 'va_start' is not the last named parameter}}
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__builtin_va_start(ap, b);
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}
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void f3(float a, ...) { // expected-note 2{{parameter of type 'float' is declared here}}
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__builtin_va_list ap;
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__builtin_va_start(ap, a); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
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__builtin_va_start(ap, (a)); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
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}
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// stdarg: PR3075 and PR2531
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void f4(const char *msg, ...) {
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__builtin_va_list ap;
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__builtin_stdarg_start((ap), (msg));
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__builtin_va_end (ap);
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}
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void f5() {
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__builtin_va_list ap;
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__builtin_va_start(ap,ap); // expected-error {{'va_start' used in function with fixed args}}
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}
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void f6(int a, ...) {
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__builtin_va_list ap;
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__builtin_va_start(ap); // expected-error {{too few arguments to function}}
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}
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// PR3350
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void
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foo(__builtin_va_list authors, ...) {
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__builtin_va_start (authors, authors);
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(void)__builtin_va_arg(authors, int);
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__builtin_va_end (authors);
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}
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void f7(int a, ...) {
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__builtin_va_list ap;
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__builtin_va_start(ap, a);
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// FIXME: This error message is sub-par.
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__builtin_va_arg(ap, int) = 1; // expected-error {{expression is not assignable}}
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int *x = &__builtin_va_arg(ap, int); // expected-error {{cannot take the address of an rvalue}}
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__builtin_va_end(ap);
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}
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void f8(int a, ...) {
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__builtin_va_list ap;
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__builtin_va_start(ap, a);
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(void)__builtin_va_arg(ap, void); // expected-error {{second argument to 'va_arg' is of incomplete type 'void'}}
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__builtin_va_end(ap);
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}
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enum E { x = -1, y = 2, z = 10000 };
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void f9(__builtin_va_list args)
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{
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(void)__builtin_va_arg(args, float); // expected-warning {{second argument to 'va_arg' is of promotable type 'float'}}
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(void)__builtin_va_arg(args, enum E); // Don't warn here in C
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(void)__builtin_va_arg(args, short); // expected-warning {{second argument to 'va_arg' is of promotable type 'short'}}
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(void)__builtin_va_arg(args, char); // expected-warning {{second argument to 'va_arg' is of promotable type 'char'}}
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}
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void f10(int a, ...) {
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int i;
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__builtin_va_list ap;
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i = __builtin_va_start(ap, a); // expected-error {{assigning to 'int' from incompatible type 'void'}}
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__builtin_va_end(ap);
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}
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void f11(short s, ...) { // expected-note {{parameter of type 'short' is declared here}}
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__builtin_va_list ap;
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__builtin_va_start(ap, s); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
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__builtin_va_end(ap);
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}
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void f12(register int i, ...) { // expected-note {{parameter of type 'int' is declared here}}
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__builtin_va_list ap;
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__builtin_va_start(ap, i); // expected-warning {{passing a parameter declared with the 'register' keyword to 'va_start' has undefined behavior}}
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__builtin_va_end(ap);
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}
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enum __attribute__((packed)) E1 {
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one1
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};
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void f13(enum E1 e, ...) {
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__builtin_va_list va;
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__builtin_va_start(va, e);
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#ifndef MS
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// In Microsoft compatibility mode, all enum types are int, but in
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// non-ms-compatibility mode, this enumeration type will undergo default
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// argument promotions.
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// expected-note@-7 {{parameter of type 'enum E1' is declared here}}
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// expected-warning@-6 {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
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#endif
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__builtin_va_end(va);
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}
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