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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/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><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="../../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></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="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../../llvm_kaleidoscope_rs/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div>
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</div></form></nav></div><section id="main-content" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1">1</span>
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</pre><pre class="rust"><code><span class="doccomment">//! Safe wrapper around the LLVM C API.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! References returned from the LLVM API are tied to the `'llvm` lifetime which is bound to the</span>
<span class="doccomment">//! context where the objects are created in.</span>
<span class="doccomment">//! We do not offer wrappers to remove or delete any objects in the context and therefore all the</span>
<span class="doccomment">//! references will be valid for the liftime of the context.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! For the scope of this tutorial we mainly use assertions to validate the results from the LLVM</span>
<span class="doccomment">//! API calls.</span>
<span class="kw">use</span> <span class="ident">llvm_sys</span>::{
<span class="ident">core::LLVMShutdown</span>,
<span class="ident">error</span>::{<span class="ident">LLVMDisposeErrorMessage</span>, <span class="ident">LLVMErrorRef</span>, <span class="ident">LLVMGetErrorMessage</span>},
<span class="ident">target</span>::{
<span class="ident">LLVM_InitializeNativeAsmParser</span>, <span class="ident">LLVM_InitializeNativeAsmPrinter</span>,
<span class="ident">LLVM_InitializeNativeTarget</span>,
},
};
<span class="kw">use</span> <span class="ident">std::ffi::CStr</span>;
<span class="kw">mod</span> <span class="ident">basic_block</span>;
<span class="kw">mod</span> <span class="ident">builder</span>;
<span class="kw">mod</span> <span class="ident">lljit</span>;
<span class="kw">mod</span> <span class="ident">module</span>;
<span class="kw">mod</span> <span class="ident">pass_manager</span>;
<span class="kw">mod</span> <span class="ident">type_</span>;
<span class="kw">mod</span> <span class="ident">value</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">basic_block::BasicBlock</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">builder::IRBuilder</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">lljit</span>::{<span class="ident">LLJit</span>, <span class="ident">ResourceTracker</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">module::Module</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">pass_manager::FunctionPassManager</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">type_::Type</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">value</span>::{<span class="ident">FnValue</span>, <span class="ident">PhiValue</span>, <span class="ident">Value</span>};
<span class="kw">struct</span> <span class="ident">Error</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'llvm</span> <span class="kw-2">mut</span> <span class="ident">libc::c_char</span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> <span class="ident">Error</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">LLVMErrorRef</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Error</span><span class="op"><</span><span class="lifetime">'llvm</span><span class="op">></span><span class="op">></span> {
(<span class="op">!</span><span class="ident">err</span>.<span class="ident">is_null</span>()).<span class="ident">then</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">Error</span>(<span class="kw">unsafe</span> { <span class="kw-2">&mut</span> <span class="kw-2">*</span><span class="ident">LLVMGetErrorMessage</span>(<span class="ident">err</span>) }))
}
<span class="kw">fn</span> <span class="ident">as_str</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">str</span> {
<span class="kw">unsafe</span> { <span class="ident">CStr::from_ptr</span>(<span class="self">self</span>.<span class="number">0</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="kw">impl</span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">Error</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) {
<span class="kw">unsafe</span> {
<span class="ident">LLVMDisposeErrorMessage</span>(<span class="self">self</span>.<span class="number">0</span> <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="ident">libc::c_char</span>);
}
}
}
<span class="doccomment">/// Initialize native target for corresponding to host (useful for jitting).</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">initialize_native_taget</span>() {
<span class="kw">unsafe</span> {
<span class="macro">assert_eq!</span>(<span class="ident">LLVM_InitializeNativeTarget</span>(), <span class="number">0</span>);
<span class="macro">assert_eq!</span>(<span class="ident">LLVM_InitializeNativeAsmParser</span>(), <span class="number">0</span>);
<span class="macro">assert_eq!</span>(<span class="ident">LLVM_InitializeNativeAsmPrinter</span>(), <span class="number">0</span>);
}
}
<span class="doccomment">/// Deallocate and destroy all "ManagedStatic" variables.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">shutdown</span>() {
<span class="kw">unsafe</span> {
<span class="ident">LLVMShutdown</span>();
};
}
</code></pre></div>
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