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diff --git a/share/doc/gccint/RTL.html b/share/doc/gccint/RTL.html new file mode 100644 index 0000000..b286450 --- /dev/null +++ b/share/doc/gccint/RTL.html @@ -0,0 +1,151 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). A copy of the license is included in the section entitled +"GNU Free Documentation License". + +(a) The FSF's Front-Cover Text is: + +A GNU Manual + +(b) The FSF's Back-Cover Text is: + +You have freedom to copy and modify this GNU Manual, like GNU + software. Copies published by the Free Software Foundation raise + funds for GNU development. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>GNU Compiler Collection (GCC) Internals: RTL</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: RTL"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: RTL"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="index.html#Top" rel="up" title="Top"> +<link href="RTL-Objects.html#RTL-Objects" rel="next" title="RTL Objects"> +<link href="Memory-model.html#Memory-model" rel="previous" title="Memory model"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="RTL"></a> +<div class="header"> +<p> +Next: <a href="Control-Flow.html#Control-Flow" accesskey="n" rel="next">Control Flow</a>, Previous: <a href="Tree-SSA.html#Tree-SSA" accesskey="p" rel="previous">Tree SSA</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="RTL-Representation"></a> +<h2 class="chapter">14 RTL Representation</h2> +<a name="index-RTL-representation"></a> +<a name="index-representation-of-RTL"></a> +<a name="index-Register-Transfer-Language-_0028RTL_0029"></a> + +<p>The last part of the compiler work is done on a low-level intermediate +representation called Register Transfer Language. In this language, the +instructions to be output are described, pretty much one by one, in an +algebraic form that describes what the instruction does. +</p> +<p>RTL is inspired by Lisp lists. It has both an internal form, made up of +structures that point at other structures, and a textual form that is used +in the machine description and in printed debugging dumps. The textual +form uses nested parentheses to indicate the pointers in the internal form. +</p> +<table class="menu" border="0" cellspacing="0"> +<tr><td align="left" valign="top">• <a href="RTL-Objects.html#RTL-Objects" accesskey="1">RTL Objects</a>:</td><td> </td><td align="left" valign="top">Expressions vs vectors vs strings vs integers. +</td></tr> +<tr><td align="left" valign="top">• <a href="RTL-Classes.html#RTL-Classes" accesskey="2">RTL Classes</a>:</td><td> </td><td align="left" valign="top">Categories of RTL expression objects, and their structure. +</td></tr> +<tr><td align="left" valign="top">• <a href="Accessors.html#Accessors" accesskey="3">Accessors</a>:</td><td> </td><td align="left" valign="top">Macros to access expression operands or vector elts. +</td></tr> +<tr><td align="left" valign="top">• <a href="Special-Accessors.html#Special-Accessors" accesskey="4">Special Accessors</a>:</td><td> </td><td align="left" valign="top">Macros to access specific annotations on RTL. +</td></tr> +<tr><td align="left" valign="top">• <a href="Flags.html#Flags" accesskey="5">Flags</a>:</td><td> </td><td align="left" valign="top">Other flags in an RTL expression. +</td></tr> +<tr><td align="left" valign="top">• <a href="Machine-Modes.html#Machine-Modes" accesskey="6">Machine Modes</a>:</td><td> </td><td align="left" valign="top">Describing the size and format of a datum. +</td></tr> +<tr><td align="left" valign="top">• <a href="Constants.html#Constants" accesskey="7">Constants</a>:</td><td> </td><td align="left" valign="top">Expressions with constant values. +</td></tr> +<tr><td align="left" valign="top">• <a href="Regs-and-Memory.html#Regs-and-Memory" accesskey="8">Regs and Memory</a>:</td><td> </td><td align="left" valign="top">Expressions representing register contents or memory. +</td></tr> +<tr><td align="left" valign="top">• <a href="Arithmetic.html#Arithmetic" accesskey="9">Arithmetic</a>:</td><td> </td><td align="left" valign="top">Expressions representing arithmetic on other expressions. +</td></tr> +<tr><td align="left" valign="top">• <a href="Comparisons.html#Comparisons">Comparisons</a>:</td><td> </td><td align="left" valign="top">Expressions representing comparison of expressions. +</td></tr> +<tr><td align="left" valign="top">• <a href="Bit_002dFields.html#Bit_002dFields">Bit-Fields</a>:</td><td> </td><td align="left" valign="top">Expressions representing bit-fields in memory or reg. +</td></tr> +<tr><td align="left" valign="top">• <a href="Vector-Operations.html#Vector-Operations">Vector Operations</a>:</td><td> </td><td align="left" valign="top">Expressions involving vector datatypes. +</td></tr> +<tr><td align="left" valign="top">• <a href="Conversions.html#Conversions">Conversions</a>:</td><td> </td><td align="left" valign="top">Extending, truncating, floating or fixing. +</td></tr> +<tr><td align="left" valign="top">• <a href="RTL-Declarations.html#RTL-Declarations">RTL Declarations</a>:</td><td> </td><td align="left" valign="top">Declaring volatility, constancy, etc. +</td></tr> +<tr><td align="left" valign="top">• <a href="Side-Effects.html#Side-Effects">Side Effects</a>:</td><td> </td><td align="left" valign="top">Expressions for storing in registers, etc. +</td></tr> +<tr><td align="left" valign="top">• <a href="Incdec.html#Incdec">Incdec</a>:</td><td> </td><td align="left" valign="top">Embedded side-effects for autoincrement addressing. +</td></tr> +<tr><td align="left" valign="top">• <a href="Assembler.html#Assembler">Assembler</a>:</td><td> </td><td align="left" valign="top">Representing <code>asm</code> with operands. +</td></tr> +<tr><td align="left" valign="top">• <a href="Debug-Information.html#Debug-Information">Debug Information</a>:</td><td> </td><td align="left" valign="top">Expressions representing debugging information. +</td></tr> +<tr><td align="left" valign="top">• <a href="Insns.html#Insns">Insns</a>:</td><td> </td><td align="left" valign="top">Expression types for entire insns. +</td></tr> +<tr><td align="left" valign="top">• <a href="Calls.html#Calls">Calls</a>:</td><td> </td><td align="left" valign="top">RTL representation of function call insns. +</td></tr> +<tr><td align="left" valign="top">• <a href="RTL-SSA.html#RTL-SSA">RTL SSA</a>:</td><td> </td><td align="left" valign="top">An on-the-side SSA form for RTL +</td></tr> +<tr><td align="left" valign="top">• <a href="Sharing.html#Sharing">Sharing</a>:</td><td> </td><td align="left" valign="top">Some expressions are unique; others *must* be copied. +</td></tr> +<tr><td align="left" valign="top">• <a href="Reading-RTL.html#Reading-RTL">Reading RTL</a>:</td><td> </td><td align="left" valign="top">Reading textual RTL from a file. +</td></tr> +</table> + +<hr> +<div class="header"> +<p> +Next: <a href="Control-Flow.html#Control-Flow" accesskey="n" rel="next">Control Flow</a>, Previous: <a href="Tree-SSA.html#Tree-SSA" accesskey="p" rel="previous">Tree SSA</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |