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<htmlxmlns="http://www.w3.org/1999/xhtml"><head><title>Sil (infer.IR.Sil)</title><linkrel="stylesheet"href="../../../odoc.css"/><metacharset="utf-8"/><metaname="generator"content="odoc 1.5.1"/><metaname="viewport"content="width=device-width,initial-scale=1.0"/><scriptsrc="../../../highlight.pack.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body><divclass="content"><header><nav><ahref="../index.html">Up</a>–<ahref="../../index.html">infer</a>»<ahref="../index.html">IR</a>» Sil</nav><h1>Module <code>IR.Sil</code></h1><navclass="toc"><ul><li><ahref="#programs-and-types">Programs and Types</a></li></ul></nav></header><aside><p>The Smallfoot Intermediate Language</p></aside><divclass="spec module"id="module-F"><ahref="#module-F"class="anchor"></a><code><spanclass="keyword">module</span> F = Stdlib.Format</code></div><section><header><h3id="programs-and-types"><ahref="#programs-and-types"class="anchor"></a>Programs and Types</h3></header><dl><dtclass="spec type"id="type-if_kind"><ahref="#type-if_kind"class="anchor"></a><code><spanclass="keyword">type</span> if_kind</code><code> = </code><tableclass="variant"><trid="type-if_kind.Ik_bexp"class="anchored"><tdclass="def constructor"><ahref="#type-if_kind.Ik_bexp"class="anchor"></a><code>| </code><code><spanclass="constructor">Ik_bexp</span></code></td><tdclass="doc"><p>boolean expressions, and exp ? exp : exp</p></td></tr><trid="type-if_kind.Ik_dowhile"class="anchored"><tdclass="def constructor"><ahref="#type-if_kind.Ik_dowhile"class="anchor"></a><code>| </code><code><spanclass="constructor">Ik_dowhile</span></code></td></tr><trid="type-if_kind.Ik_for"class="anchored"><tdclass="def constructor"><ahref="#type-if_kind.Ik_for"class="anchor"></a><code>| </code><code><spanclass="constructor">Ik_for</span></code></td></tr><trid="type-if_kind.Ik_if"class="anchored"><tdclass="def constructor"><ahref="#type-if_kind.Ik_if"class="anchor"></a><code>| </code><code><spanclass="constructor">Ik_if</span></code></td></tr><trid="type-if_kind.Ik_land_lor"class="anchored"><tdclass="def constructor"><ahref="#type-if_kind.Ik_land_lor"class="anchor"></a><code>| </code><code><spanclass="constructor">Ik_land_lor</span></code></td><tdclass="doc"><p>obtained from translation of && or ||</p></td></tr><trid="type-if_kind.Ik_while"class="anchored"><tdclass="def constructor"><ahref="#type-if_kind.Ik_while"class="anchor"></a><code>| </code><code><spanclass="constructor">Ik_while</span></code></td></tr><trid="type-if_kind.Ik_switch"class="anchored"><tdclass="def constructor"><ahref="#type-if_kind.Ik_switch"class="anchor"></a><code>| </code><code><spanclass="constructor">Ik_switch</span></code></td></tr></table></dt><dd><p>Kind of prune instruction</p></dd></dl><div><divclass="spec include"><divclass="doc"><dl><dtclass="spec value"id="val-compare_if_kind"><ahref="#val-compare_if_kind"class="anchor"></a><code><spanclass="keyword">val</span> compare_if_kind : <ahref="index.html#type-if_kind">if_kind</a><span>-></span><ahref="index.html#type-if_kind">if_kind</a><span>-></span> int</code></dt><dtclass="spec value"id="val-equal_if_kind"><ahref="#val-equal_if_kind"class="anchor"></a><code><spanclass="keyword">val</span> equal_if_kind : <ahref="index.html#type-if_kind">if_kind</a><span>-></span><ahref="index.html#type-if_kind">if_kind</a><span>-></span> bool</code></dt></dl></div></div></div><dl><dtclass="spec type"id="type-instr_metadata"><ahref="#type-instr_metadata"class="anchor"></a><code><spanclass="keyword">type</span> instr_metadata</code><code> = </code><tableclass="variant"><trid="type-instr_metadata.Abstract"class="anchored"><tdclass="def constructor"><ahref="#type-instr_metadata.Abstract"class="anchor"></a><code>| </code><code><spanclass="constructor">Abstract</span><spanclass="keyword">of</span><ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a></code></td><tdclass="doc"><p>a good place to apply abstraction, mostly used in the biabduction analysis</p></td></tr><trid="type-instr_metadata.ExitScope"class="anchored"><tdclass="def constructor"><ahref="#type-instr_metadata.ExitScope"class="anchor"></a><code>| </code><code><spanclass="constructor">ExitScope</span><spanclass="keyword">of</span><span><ahref="../Var/index.html#type-t">Var.t</a> list</span> * <ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a></code></td><tdclass="doc"><p>remove temporaries and dead program variables</p></td></tr><trid="type-instr_metadata.Nullify"class="anchored"><tdclass="def constructor"><ahref="#type-instr_metadata.Nullify"class="anchor"></a><code>| </code><code><spanclass="constructor">Nullify</span><spanclass="keyword">of</span><ahref="../Pvar/index.html#type-t">Pvar.t</a> * <ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a></code></td><tdclass="doc"><p>nullify stack variable</p></td></tr><trid="type-instr_metadata.Skip"class="anchored"><tdclass="def constructor"><ahref="#type-instr_metadata.Skip"class="anchor"></a><code>| </code><code><spanclass="constructor">Skip</span></code></td><tdclass="doc"><p>no-op</p></td></tr><trid="type-instr_metadata.VariableLifetimeBegins"class="anchored"><tdclass="def constructor"><ahref="#type-instr_metadata.VariableLifetimeBegins"class="anchor"></a><code>| </code><code><spanclass="constructor">VariableLifetimeBegins</span><spanclass="keyword">of</span><ahref="../Pvar/index.html#type-t">Pvar.t</a> * <ahref="../Typ/index.html#type-t">Typ.t</a> * <ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a></code></td><tdclass="doc"><p>stack variable declared</p></td></tr></table></dt></dl><div><divclass="spec include"><divclass="doc"><dl><dtclass="spec value"id="val-compare_instr_metadata"><ahref="#val-compare_instr_metadata"class="anchor"></a><code><spanclass="keyword">val</span> compare_instr_metadata : <ahref="index.html#type-instr_metadata">instr_metadata</a><span>-></span><ahref="index.html#type-instr_metadata">instr_metadata</a><span>-></span> int</code></dt></dl></div></div></div><dl><dtclass="spec type"id="type-instr"><ahref="#type-instr"class="anchor"></a><code><spanclass="keyword">type</span> instr</code><code> = </code><tableclass="variant"><trid="type-instr.Load"class="anchored"><tdclass="def constructor"><ahref="#type-instr.Load"class="anchor"></a><code>| </code><code><spanclass="constructor">Load</span><spanclass="keyword">of</span></code><code>{</code><tableclass="record"><trid="type-instr.id"class="anchored"><tdclass="def field"><ahref="#type-instr.id"class="anchor"></a><code>id : <ahref="../Ident/index.html#type-t">Ident.t</a>;</code></td></tr><trid="type-instr.e"class="anchored"><tdclass="def field"><ahref="#type-instr.e"class="anchor"></a><code>e : <ahref="../Exp/index.html#type-t">Exp.t</a>;</code></td></tr><trid="type-instr.root_typ"class="anchored"><tdclass="def field"><ahref="#type-instr.root_typ"class="anchor"></a><code>root_typ : <ahref="../Typ/index.html#type-t">Typ.t</a>;</code></td></tr><trid="type-instr.typ"class="anchored"><tdclass="def field"><ahref="#type-instr.typ"class="anchor"></a><code>typ : <ahref="../Typ/index.html#type-t">Typ.t</a>;</code></td></tr><trid="type-instr.loc"class="anchored"><tdclass="def field"><ahref="#type-instr.loc"class="anchor"></a><code>loc : <ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a>;</code></td></tr></table><code>}</code></td><tdclass="doc"><p>Load a value from the heap into an identifier.</p><p><code>id = *exp:typ(root_typ)</code> where</p><ul><li><code>exp</code> is an expression denoting a heap address</li><li><code>typ</code> is typ of <code>exp</code> and <code>id</code></li><li><code>root_typ</code> is the root type of <code>exp</code></li></ul><p>The <code>root_typ</code> is deprecated: it is broken in C/C++. We are removing <code>root_typ</code> in the future, so please use <code>typ</code> instead.</p></td></tr><trid="type-instr.Store"class="anchored"><tdclass="def constructor"><ahref="#type-instr.Store"class="anchor"></a><code>| </code><code><spanclass="constructor">Store</span><spanclass="keyword">of</span></code><code>{</code><tableclass="record"><trid="type-instr.e1"class="anchored"><tdclass="def field"><ahref="#type-instr.e1"class="anchor"></a><code>e1 : <ahref="../Exp/index.html#type-t">Exp.t</a>;</code></td></tr><trid="type-instr.root_typ"class="anchored"><tdclass="def field"><ahref="#type-instr.root_typ"class="anchor"></a><code>root_typ : <ahref="../Typ/index.html#type-t">Typ.t</a>;</code></td></tr><trid="type-instr.typ"class="anchored"><tdclass="def field"><ahref="#type-instr.typ"class="anchor"></a><code>typ : <ahref="../Typ/index.html#type-t">Typ.t</a>;</code></td></tr><trid="type-instr.e2"class="anchored"><tdclass="def field"><ahref="#type-instr.e2"class="anchor"></a><code>e2 : <ahref="../Exp/index.html#type-t">Exp.t</a>;</code></td></tr><trid="type-instr.loc"class="anchored"><tdclass="def field"><ahref="#type-instr.loc"class="anchor"></a><code>loc : <ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a>;</code></td></tr></table><code>}</code></td><tdclass="doc"><p>Store the value of an expression into the heap.</p><p><code>*exp1:typ(root_typ) = exp2</code> where</p><ul><li><code>exp1</code> is an expression denoting a heap address</li><li><code>typ</code> is typ of <code>*exp1</code> and <code>exp2</code></li><li><code>root_typ</code> is the root type of <code>exp1</code></li><li><code>exp2</code> is the expression whose value is stored.</li></ul><p>The <code>root_typ</code> is deprecated: it is broken in C/C++. We are removing <code>root_typ</code> in the future, so please use <code>typ</code> instead.</p></td></tr><trid="type-instr.Prune"class="anchored"><tdclass="def constructor"><ahref="#type-instr.Prune"class="anchor"></a><code>| </code><code><spanclass="constructor">Prune</span><spanclass="keyword">of</span><ahref="../Exp/index.html#type-t">Exp.t</a> * <ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a> * bool * <ahref="index.html#type-if_kind">if_kind</a></code></td><tdclass="doc"><p>prune the state based on <code>exp=1</code>, the boolean indicates whether true branch</p></td></tr><trid="type-instr.Call"class="anchored"><tdclass="def constructor"><ahref="#type-instr.Call"class="anchor"></a><code>| </code><code><spanclass="constructor">Call</span><spanclass="keyword">of</span><ahref="../Ident/index.html#type-t">Ident.t</a> * <ahref="../Typ/index.html#type-t">Typ.t</a> * <ahref="../Exp/index.html#type-t">Exp.t</a> * <span><span>(<ahref="../Exp/index.html#type-t">Exp.t</a> * <ahref="../Typ/index.html#type-t">Typ.t</a>)</span> list</span> * <ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a> * <ahref="../CallFlags/index.html#type-t">CallFlags.t</a></code></td><tdclass="doc"><p><code>Call ((ret_id, ret_typ), e_fun, arg_ts, loc, call_flags)</code> represents an instruction <code>ret_id = e_fun(arg_ts);</code></p></td></tr><trid="type-instr.Metadata"class="anchored"><tdclass="def constructor"><ahref="#type-instr.Metadata"class="anchor"></a><code>| </code><code><spanclass="constructor">Metadata</span><spanclass="keyword">of</span><ahref="index.html#type-instr_metadata">instr_metadata</a></code></td><tdclass="doc"><p>hints about the program that are not strictly needed to understand its semantics, for instance information about its original syntactic structure</p></td></tr></table></dt><dd><p>An instruction.</p></dd></dl><div><divclass="spec include"><divclass="doc"><dl><dtclass="spec value"id="val-compare_instr"><ahref="#val-compare_instr"class="anchor"></a><code><spanclass="keyword">val</span> compare_instr : <ahref="index.html#type-instr">instr</a><span>-></span><ahref="index.html#type-instr">instr</a><span>-></span> int</code></dt></dl></div></div></div><dl><dtclass="spec value"id="val-equal_instr"><ahref="#val-equal_instr"class="anchor"></a><code><spanclass="keyword">val</span> equal_instr : <ahref="index.html#type-instr">instr</a><span>-></span><ahref="index.html#type-instr">instr</a><span>-></span> bool</code></dt><dtclass="spec value"id="val-skip_instr"><ahref="#val-skip_instr"class="anchor"></a><code><spanclass="keyword">val</span> skip_instr : <ahref="index.html#type-instr">instr</a></code></dt><dtclass="spec value"id="val-instr_is_auxiliary"><ahref="#val-instr_is_auxiliary"class="anchor"></a><code><spanclass="keyword">val</span> instr_is_auxiliary : <ahref="index.html#type-instr">instr</a><span>-></span> bool</code></dt><dd><p>Check if an instruction is auxiliary, or if it comes from source instructions.</p></dd></dl><dl><dtclass="spec value"id="val-location_of_instr"><ahref="#val-location_of_instr"class="anchor"></a><code><spanclass="keyword">val</span> location_of_instr : <ahref="index.html#type-instr">instr</a><span>-></span><ahref="../../IBase/Location/index.html#type-t">IBase.Location.t</a></code></dt><dd><p>Get the location of the instruction</p></dd></dl><dl><dtclass="spec value"id="val-exps_of_instr"><ahref="#val-exps_of_instr"class="anchor"></a><code><spanclass="keyword">val</span> exps_of_instr : <ahref="index.html#type-instr">instr</a><span>-></span><span><ahref="../Exp/index.html#type-t">Exp.t</a> list</span></code></dt><dd><p>get the expressions occurring in the instruction</p></dd></dl><dl><dtclass="spec value"id="val-if_kind_to_string"><ahref="#val-if_kind_to_string"class="anchor"></a><code><spanclass="keyword">val</span> if_kind_to_string : <ahref="index.html#type-if_kind">if_kind</a><span>-></span> string</code></dt><dd><p>Pretty print an if_kind</p></dd></dl><dl><dtclass="spec value"id="val-pp_instr_metadata"><ahref="#val-pp_instr_metadata"class="anchor"></a><code><spanclass="keyword">val</span> pp_instr_metadata : <ahref="../../IStdlib/Pp/index.html#type-env">IStdlib.Pp.env</a><span>-></span><ahref="index.html#module-F">F</a>.formatter <span>-></span><ahref="index.html#type-instr_metadata">instr_metadata</a><span>-></span> unit</code></dt><dtclass="spec value"id="val-pp_instr"><ahref="#val-pp_instr"class="anchor"></a><code><spanclass="keyword">val</span> pp_instr : <span>print_types:bool</span><span>-></span><ahref="../../IStdlib/Pp/index.html#type-env">IStdlib.Pp.env</a><span>-></span><ahref="index.html#module-F">F</a>.formatter <span>-></span><ahref="index.html#type-instr">instr</a><span>-></span> unit</code></dt><dd><p>Pretty print an instruction.</p></dd></dl><dl><dtclass="spec value"id="val-d_instr"><ahref="#val-d_instr"class="anchor"></a><code><spanclass="keyword">val</span> d_instr : <ahref="index.html#type-instr">instr</a><span>-></span> unit</code></dt><dd><p>Dump an instruction.</p></dd></dl></section></div></body></html>
