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4299c727e4
It's useful to provide an indicator code with the trap, which the generic
__builtin_trap can't do. asm("brk #N") is an option, but following that with a
__builtin_unreachable() leads to two traps when the compiler doesn't know the
block can't return. So compiler support like this is useful.
40 lines
1.8 KiB
C
40 lines
1.8 KiB
C
// RUN: %clang_cc1 -triple arm64-apple-ios -fsyntax-only -verify %s
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// RUN: %clang_cc1 -triple arm64-apple-ios -DTEST1 -fsyntax-only -verify %s
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#ifdef TEST1
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void __clear_cache(void *start, void *end);
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#endif
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void test_clear_cache_chars(char *start, char *end) {
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__clear_cache(start, end);
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}
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void test_clear_cache_voids(void *start, void *end) {
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__clear_cache(start, end);
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}
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void test_clear_cache_no_args(void) {
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__clear_cache(); // expected-error {{too few arguments to function call}}
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}
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void test_memory_barriers(void) {
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__builtin_arm_dmb(16); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_dsb(17); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_isb(18); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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}
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void test_prefetch(void) {
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__builtin_arm_prefetch(0, 2, 0, 0, 0); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_prefetch(0, 0, 4, 0, 0); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_prefetch(0, 0, 0, 2, 0); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_prefetch(0, 0, 0, 0, 2); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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}
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void test_trap(short s, unsigned short us) {
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__builtin_arm_trap(42);
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__builtin_arm_trap(65535);
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__builtin_arm_trap(-1);
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__builtin_arm_trap(65536); // expected-warning {{implicit conversion from 'int' to 'unsigned short' changes value from 65536 to 0}}
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__builtin_arm_trap(s); // expected-error {{argument to '__builtin_arm_trap' must be a constant integer}}
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__builtin_arm_trap(us); // expected-error {{argument to '__builtin_arm_trap' must be a constant integer}}
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} |