Pointer-to-member does not honor LHS address space

[llvmbot]

Bugzilla Link	25941
Version	trunk
OS	All
Attachments	Bug test case, Patch solving issue
Reporter	LLVM Bugzilla Contributor
CC	@dhebbeker,@DougGregor

Extended Description

The lvalue resulting from pointer-to-member operators . and -> is always in address space 0, without regards to the address space of the left-hand value; see attached test.cpp file for a test case.

[arsenm]

Looks broken:

test.cpp:10:14: error: cannot initialize a variable of type 'AS1 int *' with an rvalue of type 'int *'
   10 |     int AS1* x = &(f->*(&foo::bar));
      |              ^   ~~~~~~~~~~~~~~~~~~

[llvmbot]

@llvm/issue-subscribers-clang-frontend

[Endilll]

Compiler explorer link for the previous comment: https://godbolt.org/z/4v3fzv4rj

[shafik]

code:

struct foo {
    int bar;
};

#define AS1 __attribute__((address_space(1)))

int main()
{
    foo AS1* f;
    int AS1* x = &(f->*(&foo::bar));
}