GCC Middle and Back End API Reference
mem_addr_template Struct Reference
Collaboration diagram for mem_addr_template:

Data Fields

rtx ref

Detailed Description


Memory address lowering and addressing mode selection. Copyright (C) 2004-2013 Free Software Foundation, Inc.

This file is part of GCC.

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   Utility functions for manipulation with TARGET_MEM_REFs -- tree expressions
   that directly map to addressing modes of the target.  
   FIXME: We compute address costs using RTL.  
   TODO -- handling of symbols (according to Richard Hendersons
   comments, http://gcc.gnu.org/ml/gcc-patches/2005-04/msg00949.html):

   There are at least 5 different kinds of symbols that we can run up against:

     (1) binds_local_p, small data area.
     (2) binds_local_p, eg local statics
     (3) !binds_local_p, eg global variables
     (4) thread local, local_exec
     (5) thread local, !local_exec

   Now, (1) won't appear often in an array context, but it certainly can.
   All you have to do is set -GN high enough, or explicitly mark any
   random object __attribute__((section (".sdata"))).

   All of these affect whether or not a symbol is in fact a valid address.
   The only one tested here is (3).  And that result may very well
   be incorrect for (4) or (5).

   An incorrect result here does not cause incorrect results out the
   back end, because the expander in expr.c validizes the address.  However
   it would be nice to improve the handling here in order to produce more
   precise results.  
   A "template" for memory address, used to determine whether the address is
   valid for mode.  

Field Documentation

rtx* mem_addr_template::off_p
rtx mem_addr_template::ref
rtx* mem_addr_template::step_p

The documentation for this struct was generated from the following file: