6ca2f1938f
This change teaches the Sema logic for `__builtin_memcpy_inline` to implicitly convert arrays passed as arguments to pointers, similarly to regular `memcpy`.
This code will no longer cause a compiler crash:
```
void f(char *p) {
char s[1] = {0};
__builtin_memcpy_inline(p, s, 1);
}
```
rdar://88147527
Differential Revision: https://reviews.llvm.org/D121475
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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#define NULL ((char *)0)
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#if __has_builtin(__builtin_memcpy_inline)
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#warning defined as expected
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// expected-warning@-1 {{defined as expected}}
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#endif
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void test_memcpy_inline_null_src(void *ptr) {
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__builtin_memcpy_inline(ptr, NULL, 4); // expected-warning {{null passed to a callee that requires a non-null argument}}
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}
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void test_memcpy_inline_null_dst(void *ptr) {
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__builtin_memcpy_inline(NULL, ptr, 4); // expected-warning {{null passed to a callee that requires a non-null argument}}
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}
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void test_memcpy_inline_null_buffers() {
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__builtin_memcpy_inline(NULL, NULL, 4);
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// expected-warning@-1 {{null passed to a callee that requires a non-null argument}}
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// expected-warning@-2 {{null passed to a callee that requires a non-null argument}}
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}
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void test_memcpy_inline_null_buffer_is_ok_if_size_is_zero(void *ptr) {
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__builtin_memcpy_inline(ptr, NULL, /*size */ 0);
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__builtin_memcpy_inline(NULL, ptr, /*size */ 0);
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__builtin_memcpy_inline(NULL, NULL, /*size */ 0);
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}
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void test_memcpy_inline_non_constant_size(void *dst, const void *src, unsigned size) {
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__builtin_memcpy_inline(dst, src, size); // expected-error {{argument to '__builtin_memcpy_inline' must be a constant integer}}
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}
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template <unsigned size>
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void test_memcpy_inline_template(void *dst, const void *src) {
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// we do not try to evaluate size in non intantiated templates.
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__builtin_memcpy_inline(dst, src, size);
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}
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void test_memcpy_inline_implicit_conversion(void *ptr) {
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char a[5];
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__builtin_memcpy_inline(ptr, a, 5);
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__builtin_memcpy_inline(a, ptr, 5);
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}
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