[PATCH] D81479: [BPF] introduce __builtin_load_u32_to_ptr() intrinsic

[Yonghong Song via Phabricator via cfe-commits]

yonghong-song marked an inline comment as done.
yonghong-song added inline comments.


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Comment at: clang/test/CodeGen/builtin-bpf-load-u32-to-ptr.c:5
+struct t { int a; int b; };
+void *test(struct t *arg) { return __builtin_load_u32_to_ptr(arg, 4); }
+
----------------
ast wrote:
> can it be expressed as:
> __builtin_load_u32_to_ptr(&arg->b) ?
Good question. If this, we will have code like
   tmp = ctx + 76
   void *ptr = *(u32 *)(tmp + 0)

IIRC, the verifier does not like this. The verifier prefers `ctx + offset`.


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  https://reviews.llvm.org/D81479/new/

https://reviews.llvm.org/D81479