gcc/doc/gccint/rtl-representation.rst

   1 ..
   2   Copyright 1988-2022 Free Software Foundation, Inc.
   3   This is part of the GCC manual.
   4   For copying conditions, see the copyright.rst file.
   5
   6 .. index:: RTL representation, representation of RTL, Register Transfer Language (RTL)
   7
   8 .. _rtl:
   9
  10 RTL Representation
  11 ------------------
  12
  13 The last part of the compiler work is done on a low-level intermediate
  14 representation called Register Transfer Language.  In this language, the
  15 instructions to be output are described, pretty much one by one, in an
  16 algebraic form that describes what the instruction does.
  17
  18 RTL is inspired by Lisp lists.  It has both an internal form, made up of
  19 structures that point at other structures, and a textual form that is used
  20 in the machine description and in printed debugging dumps.  The textual
  21 form uses nested parentheses to indicate the pointers in the internal form.
  22
  23 .. toctree::
  24   :maxdepth: 2
  25
  26   rtl-representation/rtl-object-types
  27   rtl-representation/rtl-classes-and-formats
  28   rtl-representation/access-to-operands
  29   rtl-representation/access-to-special-operands
  30   rtl-representation/flags-in-an-rtl-expression
  31   rtl-representation/machine-modes
  32   rtl-representation/constant-expression-types
  33   rtl-representation/registers-and-memory
  34   rtl-representation/rtl-expressions-for-arithmetic
  35   rtl-representation/comparison-operations
  36   rtl-representation/bit-fields
  37   rtl-representation/vector-operations
  38   rtl-representation/conversions
  39   rtl-representation/declarations
  40   rtl-representation/side-effect-expressions
  41   rtl-representation/embedded-side-effects-on-addresses
  42   rtl-representation/assembler-instructions-as-expressions
  43   rtl-representation/variable-location-debug-information-in-rtl
  44   rtl-representation/insns
  45   rtl-representation/rtl-representation-of-function-call-insns
  46   rtl-representation/on-the-side-ssa-form-for-rtl
  47   rtl-representation/structure-sharing-assumptions
  48   rtl-representation/reading-rtl