[BE] How to query attributes of a function being called?

[Ian Lance Taylor]

Georg-Johann Lay <avr@gjlay.de> writes:

> Hi, suppose this test case of C code:
>
> typedef void (*cb_t)(void) __attribute__((callback));
>
> void caller (cb_t cb)
> {
>     cb();
> }
>
> What I need in the backend is a way to query for the attributs that
> are attaches to callees like 'cb'.
>
> ./config/i386/winnt.c uses TARGET_MANGLE_DECL_ASSEMBLER_NAME in order
> to encode some information in the callee's name, but in my case the
> call may be indirect as indicated above.

It may work to look at the MEM_EXPR of the call operand and look at
DECL_ATTRIBUTES of that.

Ian