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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gccint/GIMPLE_005fDEBUG.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/gccint/GIMPLE_005fDEBUG.html b/share/doc/gccint/GIMPLE_005fDEBUG.html new file mode 100644 index 0000000..d0cda26 --- /dev/null +++ b/share/doc/gccint/GIMPLE_005fDEBUG.html @@ -0,0 +1,198 @@ +<!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: GIMPLE_DEBUG</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: GIMPLE_DEBUG"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: GIMPLE_DEBUG"> +<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="Tuple-specific-accessors.html#Tuple-specific-accessors" rel="up" title="Tuple specific accessors"> +<link href="GIMPLE_005fEH_005fFILTER.html#GIMPLE_005fEH_005fFILTER" rel="next" title="GIMPLE_EH_FILTER"> +<link href="GIMPLE_005fCOND.html#GIMPLE_005fCOND" rel="previous" title="GIMPLE_COND"> +<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="GIMPLE_005fDEBUG"></a> +<div class="header"> +<p> +Next: <a href="GIMPLE_005fEH_005fFILTER.html#GIMPLE_005fEH_005fFILTER" accesskey="n" rel="next"><code>GIMPLE_EH_FILTER</code></a>, Previous: <a href="GIMPLE_005fCOND.html#GIMPLE_005fCOND" accesskey="p" rel="previous"><code>GIMPLE_COND</code></a>, Up: <a href="Tuple-specific-accessors.html#Tuple-specific-accessors" accesskey="u" rel="up">Tuple specific accessors</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="GIMPLE_005fDEBUG-1"></a> +<h4 class="subsection">12.8.7 <code>GIMPLE_DEBUG</code></h4> +<a name="index-GIMPLE_005fDEBUG"></a> +<a name="index-GIMPLE_005fDEBUG_005fBIND"></a> +<a name="index-GIMPLE_005fDEBUG_005fBEGIN_005fSTMT"></a> +<a name="index-GIMPLE_005fDEBUG_005fINLINE_005fENTRY"></a> + +<dl> +<dt><a name="index-_002agimple_005fbuild_005fdebug_005fbind"></a>GIMPLE function: <em>gdebug</em> <strong>*gimple_build_debug_bind</strong> <em>(tree var, tree value, gimple stmt)</em></dt> +<dd><p>Build a <code>GIMPLE_DEBUG</code> statement with <code>GIMPLE_DEBUG_BIND</code> +<code>subcode</code>. The effect of this statement is to tell debug +information generation machinery that the value of user variable +<code>var</code> is given by <code>value</code> at that point, and to remain with +that value until <code>var</code> runs out of scope, a +dynamically-subsequent debug bind statement overrides the binding, or +conflicting values reach a control flow merge point. Even if +components of the <code>value</code> expression change afterwards, the +variable is supposed to retain the same value, though not necessarily +the same location. +</p> +<p>It is expected that <code>var</code> be most often a tree for automatic user +variables (<code>VAR_DECL</code> or <code>PARM_DECL</code>) that satisfy the +requirements for gimple registers, but it may also be a tree for a +scalarized component of a user variable (<code>ARRAY_REF</code>, +<code>COMPONENT_REF</code>), or a debug temporary (<code>DEBUG_EXPR_DECL</code>). +</p> +<p>As for <code>value</code>, it can be an arbitrary tree expression, but it is +recommended that it be in a suitable form for a gimple assignment +<code>RHS</code>. It is not expected that user variables that could appear +as <code>var</code> ever appear in <code>value</code>, because in the latter we’d +have their <code>SSA_NAME</code>s instead, but even if they were not in SSA +form, user variables appearing in <code>value</code> are to be regarded as +part of the executable code space, whereas those in <code>var</code> are to +be regarded as part of the source code space. There is no way to +refer to the value bound to a user variable within a <code>value</code> +expression. +</p> +<p>If <code>value</code> is <code>GIMPLE_DEBUG_BIND_NOVALUE</code>, debug information +generation machinery is informed that the variable <code>var</code> is +unbound, i.e., that its value is indeterminate, which sometimes means +it is really unavailable, and other times that the compiler could not +keep track of it. +</p> +<p>Block and location information for the newly-created stmt are +taken from <code>stmt</code>, if given. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fdebug_005fbind_005fget_005fvar"></a>GIMPLE function: <em>tree</em> <strong>gimple_debug_bind_get_var</strong> <em>(gimple stmt)</em></dt> +<dd><p>Return the user variable <var>var</var> that is bound at <code>stmt</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fdebug_005fbind_005fget_005fvalue"></a>GIMPLE function: <em>tree</em> <strong>gimple_debug_bind_get_value</strong> <em>(gimple stmt)</em></dt> +<dd><p>Return the value expression that is bound to a user variable at +<code>stmt</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fdebug_005fbind_005fget_005fvalue_005fptr"></a>GIMPLE function: <em>tree *</em> <strong>gimple_debug_bind_get_value_ptr</strong> <em>(gimple stmt)</em></dt> +<dd><p>Return a pointer to the value expression that is bound to a user +variable at <code>stmt</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fdebug_005fbind_005fset_005fvar"></a>GIMPLE function: <em>void</em> <strong>gimple_debug_bind_set_var</strong> <em>(gimple stmt, tree var)</em></dt> +<dd><p>Modify the user variable bound at <code>stmt</code> to <var>var</var>. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fdebug_005fbind_005fset_005fvalue"></a>GIMPLE function: <em>void</em> <strong>gimple_debug_bind_set_value</strong> <em>(gimple stmt, tree var)</em></dt> +<dd><p>Modify the value bound to the user variable bound at <code>stmt</code> to +<var>value</var>. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fdebug_005fbind_005freset_005fvalue"></a>GIMPLE function: <em>void</em> <strong>gimple_debug_bind_reset_value</strong> <em>(gimple stmt)</em></dt> +<dd><p>Modify the value bound to the user variable bound at <code>stmt</code> so +that the variable becomes unbound. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fdebug_005fbind_005fhas_005fvalue_005fp"></a>GIMPLE function: <em>bool</em> <strong>gimple_debug_bind_has_value_p</strong> <em>(gimple stmt)</em></dt> +<dd><p>Return <code>TRUE</code> if <code>stmt</code> binds a user variable to a value, +and <code>FALSE</code> if it unbinds the variable. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fbuild_005fdebug_005fbegin_005fstmt"></a>GIMPLE function: <em>gimple</em> <strong>gimple_build_debug_begin_stmt</strong> <em>(tree block, location_t location)</em></dt> +<dd><p>Build a <code>GIMPLE_DEBUG</code> statement with +<code>GIMPLE_DEBUG_BEGIN_STMT</code> <code>subcode</code>. The effect of this +statement is to tell debug information generation machinery that the +user statement at the given <code>location</code> and <code>block</code> starts at +the point at which the statement is inserted. The intent is that side +effects (e.g. variable bindings) of all prior user statements are +observable, and that none of the side effects of subsequent user +statements are. +</p></dd></dl> + +<dl> +<dt><a name="index-gimple_005fbuild_005fdebug_005finline_005fentry"></a>GIMPLE function: <em>gimple</em> <strong>gimple_build_debug_inline_entry</strong> <em>(tree block, location_t location)</em></dt> +<dd><p>Build a <code>GIMPLE_DEBUG</code> statement with +<code>GIMPLE_DEBUG_INLINE_ENTRY</code> <code>subcode</code>. The effect of this +statement is to tell debug information generation machinery that a +function call at <code>location</code> underwent inline substitution, that +<code>block</code> is the enclosing lexical block created for the +substitution, and that at the point of the program in which the stmt is +inserted, all parameters for the inlined function are bound to the +respective arguments, and none of the side effects of its stmts are +observable. +</p></dd></dl> + +<hr> +<div class="header"> +<p> +Next: <a href="GIMPLE_005fEH_005fFILTER.html#GIMPLE_005fEH_005fFILTER" accesskey="n" rel="next"><code>GIMPLE_EH_FILTER</code></a>, Previous: <a href="GIMPLE_005fCOND.html#GIMPLE_005fCOND" accesskey="p" rel="previous"><code>GIMPLE_COND</code></a>, Up: <a href="Tuple-specific-accessors.html#Tuple-specific-accessors" accesskey="u" rel="up">Tuple specific accessors</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> |