tbaeder added inline comments.
================
Comment at: clang/test/Sema/builtin-memcpy.c:4-8
+int b() {
+ struct { } a[10];
+ __builtin_memcpy(&a[2], a, 2); // expected-warning {{buffer has size 0, but
size argument is 2}}
+ return 0;
+}
----------------
aaron.ballman wrote:
> The only other test I'd like to see is one like:
> ```
> constexpr int b() {
> struct { } a[10];
> __builtin_memcpy(&a[2], a, 2); // UB here should be caught, right?
> return 0;
> }
>
> static_assert(b() == 0, "");
> ```
> (if that's follow-up work, that's fine too, just leave a test with a FIXME
> comment.)
Nope, clang accepts that and GCC rejects the function when calling.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D157252/new/
https://reviews.llvm.org/D157252
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