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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/llvm/value.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>value.rs - source</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../../ayu.css" disabled ><script id="default-settings" ></script><script src="../../../storage.js"></script><script src="../../../crates.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../../../llvm_kaleidoscope_rs/index.html'><div class='logo-container rust-logo'><img src='../../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input"name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../../wheel.svg"></a></div></form></nav><section id="main" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust">
<span class="kw">use</span> <span class="ident">llvm_sys</span>::{
<span class="ident">analysis</span>::{<span class="ident">LLVMVerifierFailureAction</span>, <span class="ident">LLVMVerifyFunction</span>},
<span class="ident">core</span>::{
<span class="ident">LLVMCountBasicBlocks</span>, <span class="ident">LLVMCountParams</span>, <span class="ident">LLVMDumpValue</span>, <span class="ident">LLVMGetParam</span>, <span class="ident">LLVMGetReturnType</span>,
<span class="ident">LLVMGetValueKind</span>, <span class="ident">LLVMGetValueName2</span>, <span class="ident">LLVMSetValueName2</span>, <span class="ident">LLVMTypeOf</span>,
},
<span class="ident">prelude::LLVMValueRef</span>,
<span class="ident">LLVMTypeKind</span>, <span class="ident">LLVMValueKind</span>,
};
<span class="kw">use</span> <span class="ident">std::ffi::CStr</span>;
<span class="kw">use</span> <span class="ident">std::marker::PhantomData</span>;
<span class="kw">use</span> <span class="ident">std::ops::Deref</span>;
<span class="kw">use</span> <span class="kw">super</span><span class="ident">::Type</span>;
<span class="doccomment">/// Wrapper for a LLVM Value Reference.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>)]</span>
<span class="attribute">#[<span class="ident">repr</span>(<span class="ident">transparent</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Value</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span>(<span class="ident">LLVMValueRef</span>, <span class="ident">PhantomData</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'llvm</span> ()<span class="op">></span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> <span class="ident">Value</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> {
<span class="doccomment">/// Create a new Value instance.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if `value_ref` is a null pointer.</span>
<span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">value_ref</span>: <span class="ident">LLVMValueRef</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="macro">assert!</span>(<span class="op">!</span><span class="ident">value_ref</span>.<span class="ident">is_null</span>());
<span class="ident">Value</span>(<span class="ident">value_ref</span>, <span class="ident">PhantomData</span>)
}
<span class="doccomment">/// Get the raw LLVM value reference.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn</span> <span class="ident">value_ref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">LLVMValueRef</span> {
<span class="self">self</span>.<span class="number">0</span>
}
<span class="doccomment">/// Get the LLVM value kind for the given value reference.</span>
<span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn</span> <span class="ident">kind</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">LLVMValueKind</span> {
<span class="kw">unsafe</span> { <span class="ident">LLVMGetValueKind</span>(<span class="self">self</span>.<span class="ident">value_ref</span>()) }
}
<span class="doccomment">/// Dump the LLVM Value to stdout.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dump</span>(<span class="kw-2">&</span><span class="self">self</span>) {
<span class="kw">unsafe</span> { <span class="ident">LLVMDumpValue</span>(<span class="self">self</span>.<span class="ident">value_ref</span>()) };
}
<span class="doccomment">/// Get a type reference representing for the given value reference.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if LLVM API returns a `null` pointer.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">type_of</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Type</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">type_ref</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">LLVMTypeOf</span>(<span class="self">self</span>.<span class="ident">value_ref</span>()) };
<span class="ident">Type::new</span>(<span class="ident">type_ref</span>)
}
<span class="doccomment">/// Set the name for the given value reference.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if LLVM API returns a `null` pointer.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_name</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">name</span>: <span class="kw-2">&</span><span class="ident">str</span>) {
<span class="kw">unsafe</span> { <span class="ident">LLVMSetValueName2</span>(<span class="self">self</span>.<span class="ident">value_ref</span>(), <span class="ident">name</span>.<span class="ident">as_ptr</span>().<span class="ident">cast</span>(), <span class="ident">name</span>.<span class="ident">len</span>()) };
}
<span class="doccomment">/// Get the name for the given value reference.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if LLVM API returns a `null` pointer.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_name</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="lifetime">'llvm</span> <span class="ident">str</span> {
<span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span>: <span class="ident">libc::size_t</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="ident">LLVMGetValueName2</span>(<span class="self">self</span>.<span class="number">0</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">len</span> <span class="kw">as</span> <span class="kw">_</span>);
<span class="macro">assert!</span>(<span class="op">!</span><span class="ident">name</span>.<span class="ident">is_null</span>());
<span class="ident">CStr::from_ptr</span>(<span class="ident">name</span>)
};
<span class="comment">// TODO: Does this string live for the time of the LLVM context?!</span>
<span class="ident">name</span>.<span class="ident">to_str</span>()
.<span class="ident">expect</span>(<span class="string">"Expected valid UTF8 string from LLVM API"</span>)
}
<span class="doccomment">/// Check if value is of `f64` type.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_f64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">type_of</span>().<span class="ident">kind</span>() <span class="op">=</span><span class="op">=</span> <span class="ident">LLVMTypeKind::LLVMDoubleTypeKind</span>
}
<span class="doccomment">/// Check if value is of integer type.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_int</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">type_of</span>().<span class="ident">kind</span>() <span class="op">=</span><span class="op">=</span> <span class="ident">LLVMTypeKind::LLVMIntegerTypeKind</span>
}
}
<span class="doccomment">/// Wrapper for a LLVM Value Reference specialized for contexts where function values are needed.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>)]</span>
<span class="attribute">#[<span class="ident">repr</span>(<span class="ident">transparent</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">FnValue</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span>(<span class="ident">Value</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> <span class="ident">Deref</span> <span class="kw">for</span> <span class="ident">FnValue</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Target</span> <span class="op">=</span> <span class="ident">Value</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">deref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="self">Self</span><span class="ident">::Target</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> <span class="ident">FnValue</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> {
<span class="doccomment">/// Create a new FnValue instance.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if `value_ref` is a null pointer.</span>
<span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">value_ref</span>: <span class="ident">LLVMValueRef</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="kw">let</span> <span class="ident">value</span> <span class="op">=</span> <span class="ident">Value::new</span>(<span class="ident">value_ref</span>);
<span class="macro">debug_assert_eq!</span>(
<span class="ident">value</span>.<span class="ident">kind</span>(),
<span class="ident">LLVMValueKind::LLVMFunctionValueKind</span>,
<span class="string">"Expected a fn value when constructing FnValue!"</span>
);
<span class="ident">FnValue</span>(<span class="ident">value</span>)
}
<span class="doccomment">/// Get a type reference representing the return value of the given function value.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if LLVM API returns a `null` pointer.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ret_type</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Type</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">type_ref</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">LLVMGetReturnType</span>(<span class="ident">LLVMTypeOf</span>(<span class="self">self</span>.<span class="ident">value_ref</span>())) };
<span class="ident">Type::new</span>(<span class="ident">type_ref</span>)
}
<span class="doccomment">/// Get the number of function arguments for the given function value.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">args</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> {
<span class="kw">unsafe</span> { <span class="ident">LLVMCountParams</span>(<span class="self">self</span>.<span class="ident">value_ref</span>()) <span class="kw">as</span> <span class="ident">usize</span> }
}
<span class="doccomment">/// Get a value reference for the function argument at index `idx`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if LLVM API returns a `null` pointer or indexed out of bounds.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">arg</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Value</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> {
<span class="macro">assert!</span>(<span class="ident">idx</span> <span class="op"><</span> <span class="self">self</span>.<span class="ident">args</span>());
<span class="kw">let</span> <span class="ident">value_ref</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">LLVMGetParam</span>(<span class="self">self</span>.<span class="ident">value_ref</span>(), <span class="ident">idx</span> <span class="kw">as</span> <span class="ident">libc::c_uint</span>) };
<span class="ident">Value::new</span>(<span class="ident">value_ref</span>)
}
<span class="doccomment">/// Get the number of Basic Blocks for the given function value.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">basic_blocks</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> {
<span class="kw">unsafe</span> { <span class="ident">LLVMCountBasicBlocks</span>(<span class="self">self</span>.<span class="ident">value_ref</span>()) <span class="kw">as</span> <span class="ident">usize</span> }
}
<span class="doccomment">/// Verify that the given function is valid.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">verify</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="kw">unsafe</span> {
<span class="ident">LLVMVerifyFunction</span>(
<span class="self">self</span>.<span class="ident">value_ref</span>(),
<span class="ident">LLVMVerifierFailureAction::LLVMPrintMessageAction</span>,
) <span class="op">=</span><span class="op">=</span> <span class="number">0</span>
}
}
}
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