Re: [PATCH] reg-notes.def: Fix up description of REG_NOALIAS

[Jeff Law]

On 10/12/23 03:41, Alex Coplan wrote:

Hi,

The description of the REG_NOALIAS note in reg-notes.def isn't quite
right. It describes it as being attached to call insns, but it is
instead attached to a move insn receiving the return value from a call.

This can be seen by looking at the code in calls.cc:expand_call which
attaches the note:

   emit_move_insn (temp, valreg);

   /* The return value from a malloc-like function cannot alias
      anything else.  */
   last = get_last_insn ();
   add_reg_note (last, REG_NOALIAS, temp);

Bootstrapped on aarch64-linux-gnu, OK for trunk?

Thanks,
Alex

gcc/ChangeLog:

         * reg-notes.def (NOALIAS): Correct comment.

OK
jeff