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38637ee477
In the same spirit as D73543 and in reply to https://reviews.llvm.org/D126768#3549920 this patch is adding support for `__builtin_memset_inline`. The idea is to get support from the compiler to easily write efficient memory function implementations. This patch could be split in two: - one for the LLVM part adding the `llvm.memset.inline.*` intrinsics. - and another one for the Clang part providing the instrinsic as a builtin. Differential Revision: https://reviews.llvm.org/D126903
41 lines
1.5 KiB
C++
41 lines
1.5 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_memset_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_memset_inline_invalid_arg_types() {
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__builtin_memset_inline(1, 2, 3); // expected-error {{cannot initialize a parameter of type 'void *' with an rvalue of type 'int'}}
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}
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void test_memset_inline_null_dst(void *ptr) {
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__builtin_memset_inline(NULL, 1, 4); // expected-warning {{null passed to a callee that requires a non-null argument}}
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}
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void test_memset_inline_null_buffer_is_ok_if_size_is_zero(void *ptr, char value) {
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__builtin_memset_inline(NULL, value, /*size */ 0);
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}
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void test_memset_inline_non_constant_size(void *dst, char value, unsigned size) {
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__builtin_memset_inline(dst, value, size); // expected-error {{argument to '__builtin_memset_inline' must be a constant integer}}
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}
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template <unsigned size>
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void test_memset_inline_template(void *dst, char value) {
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// we do not try to evaluate size in non intantiated templates.
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__builtin_memset_inline(dst, value, size);
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}
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void test_memset_inline_implicit_conversion(void *ptr, char value) {
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char a[5];
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__builtin_memset_inline(a, value, 5);
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}
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void test_memset_inline_num_args(void *dst, char value) {
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__builtin_memset_inline(); // expected-error {{too few arguments to function call}}
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__builtin_memset_inline(dst, value, 4, NULL); // expected-error {{too many arguments to function call}}
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}
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