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authorjohannst <johannst@users.noreply.github.com>2021-09-24 22:49:57 +0000
committerjohannst <johannst@users.noreply.github.com>2021-09-24 22:49:57 +0000
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treebefae4a33b331e0e8c322a4c3ea5587b4c94898e /src/llvm_kaleidoscope_rs/llvm/module.rs.html
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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&#x2F;llvm&#x2F;module.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>module.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">&#9776;</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">core</span>::{
+ <span class="ident">LLVMAddFunction</span>, <span class="ident">LLVMAppendBasicBlockInContext</span>, <span class="ident">LLVMDisposeModule</span>, <span class="ident">LLVMDoubleTypeInContext</span>,
+ <span class="ident">LLVMDumpModule</span>, <span class="ident">LLVMGetNamedFunction</span>, <span class="ident">LLVMModuleCreateWithNameInContext</span>,
+ },
+ <span class="ident">orc2</span>::{
+ <span class="ident">LLVMOrcCreateNewThreadSafeContext</span>, <span class="ident">LLVMOrcCreateNewThreadSafeModule</span>,
+ <span class="ident">LLVMOrcDisposeThreadSafeContext</span>, <span class="ident">LLVMOrcThreadSafeContextGetContext</span>,
+ <span class="ident">LLVMOrcThreadSafeContextRef</span>, <span class="ident">LLVMOrcThreadSafeModuleRef</span>,
+ },
+ <span class="ident">prelude</span>::{<span class="ident">LLVMBool</span>, <span class="ident">LLVMContextRef</span>, <span class="ident">LLVMModuleRef</span>, <span class="ident">LLVMTypeRef</span>},
+ <span class="ident">LLVMTypeKind</span>,
+};
+
+<span class="kw">use</span> <span class="ident">std::convert::TryFrom</span>;
+<span class="kw">use</span> <span class="ident">std::marker::PhantomData</span>;
+
+<span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">BasicBlock</span>, <span class="ident">FnValue</span>, <span class="ident">Type</span>};
+<span class="kw">use</span> <span class="kw">crate</span><span class="ident">::SmallCStr</span>;
+
+<span class="comment">// Definition of LLVM C API functions using our `repr(transparent)` types.</span>
+<span class="kw">extern</span> <span class="string">&quot;C&quot;</span> {
+ <span class="kw">fn</span> <span class="ident">LLVMFunctionType</span>(
+ <span class="ident">ReturnType</span>: <span class="ident">Type</span><span class="op">&lt;</span><span class="lifetime">&#39;_</span><span class="op">&gt;</span>,
+ <span class="ident">ParamTypes</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">Type</span><span class="op">&lt;</span><span class="lifetime">&#39;_</span><span class="op">&gt;</span>,
+ <span class="ident">ParamCount</span>: <span class="ident">::libc::c_uint</span>,
+ <span class="ident">IsVarArg</span>: <span class="ident">LLVMBool</span>,
+ ) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">LLVMTypeRef</span>;
+}
+
+<span class="doccomment">/// Wrapper for a LLVM Module with its own LLVM Context.</span>
+<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Module</span> {
+ <span class="ident">tsctx</span>: <span class="ident">LLVMOrcThreadSafeContextRef</span>,
+ <span class="ident">ctx</span>: <span class="ident">LLVMContextRef</span>,
+ <span class="ident">module</span>: <span class="ident">LLVMModuleRef</span>,
+}
+
+<span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span> <span class="ident">Module</span> {
+ <span class="doccomment">/// Create a new Module instance.</span>
+ <span class="doccomment">///</span>
+ <span class="doccomment">/// # Panics</span>
+ <span class="doccomment">///</span>
+ <span class="doccomment">/// Panics if creating the context or the module fails.</span>
+ <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
+ <span class="kw">let</span> (<span class="ident">tsctx</span>, <span class="ident">ctx</span>, <span class="ident">module</span>) <span class="op">=</span> <span class="kw">unsafe</span> {
+ <span class="comment">// We generate a thread safe context because we are going to jit this IR module and</span>
+ <span class="comment">// there is no method to create a thread safe context wrapper from an existing context</span>
+ <span class="comment">// reference (at the time of writing this).</span>
+ <span class="comment">//</span>
+ <span class="comment">// ThreadSafeContext has shared ownership (start with ref count 1).</span>
+ <span class="comment">// We must explicitly dispose our reference (dec ref count).</span>
+ <span class="kw">let</span> <span class="ident">tc</span> <span class="op">=</span> <span class="ident">LLVMOrcCreateNewThreadSafeContext</span>();
+ <span class="macro">assert!</span>(<span class="op">!</span><span class="ident">tc</span>.<span class="ident">is_null</span>());
+
+ <span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">LLVMOrcThreadSafeContextGetContext</span>(<span class="ident">tc</span>);
+ <span class="kw">let</span> <span class="ident">m</span> <span class="op">=</span> <span class="ident">LLVMModuleCreateWithNameInContext</span>(<span class="string">b&quot;module\0&quot;</span>.<span class="ident">as_ptr</span>().<span class="ident">cast</span>(), <span class="ident">c</span>);
+ <span class="macro">assert!</span>(<span class="op">!</span><span class="ident">c</span>.<span class="ident">is_null</span>() <span class="op">&amp;&amp;</span> <span class="op">!</span><span class="ident">m</span>.<span class="ident">is_null</span>());
+ (<span class="ident">tc</span>, <span class="ident">c</span>, <span class="ident">m</span>)
+ };
+
+ <span class="ident">Module</span> { <span class="ident">tsctx</span>, <span class="ident">ctx</span>, <span class="ident">module</span> }
+ }
+
+ <span class="doccomment">/// Get the raw LLVM context 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">ctx</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">LLVMContextRef</span> {
+ <span class="self">self</span>.<span class="ident">ctx</span>
+ }
+
+ <span class="doccomment">/// Get the raw LLVM module 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">module</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">LLVMModuleRef</span> {
+ <span class="self">self</span>.<span class="ident">module</span>
+ }
+
+ <span class="doccomment">/// Consume the module and turn in into a raw LLVM ThreadSafeModule reference.</span>
+ <span class="doccomment">///</span>
+ <span class="doccomment">/// If ownership of the raw reference is not transferred (eg to the JIT), memory will be leaked</span>
+ <span class="doccomment">/// in case the reference is disposed explicitly with LLVMOrcDisposeThreadSafeModule.</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">into_raw_thread_safe_module</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">LLVMOrcThreadSafeModuleRef</span> {
+ <span class="kw">let</span> <span class="ident">m</span> <span class="op">=</span> <span class="ident">std::mem::replace</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">module</span>, <span class="ident">std::ptr::null_mut</span>());
+
+ <span class="comment">// ThreadSafeModule has unique ownership.</span>
+ <span class="comment">// Takes ownership of module and increments ThreadSafeContext ref count.</span>
+ <span class="comment">//</span>
+ <span class="comment">// We must not reference/dispose `m` after this call, but we need to dispose our `tsctx`</span>
+ <span class="comment">// reference.</span>
+ <span class="kw">let</span> <span class="ident">tm</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">LLVMOrcCreateNewThreadSafeModule</span>(<span class="ident">m</span>, <span class="self">self</span>.<span class="ident">tsctx</span>) };
+ <span class="macro">assert!</span>(<span class="op">!</span><span class="ident">tm</span>.<span class="ident">is_null</span>());
+
+ <span class="ident">tm</span>
+ }
+
+ <span class="doccomment">/// Dump LLVM IR emitted into the Module to stdout.</span>
+ <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dump</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) {
+ <span class="kw">unsafe</span> { <span class="ident">LLVMDumpModule</span>(<span class="self">self</span>.<span class="ident">module</span>) };
+ }
+
+ <span class="doccomment">/// Get a type reference representing a `f64` float.</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_f64</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Type</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span> {
+ <span class="kw">let</span> <span class="ident">type_ref</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">LLVMDoubleTypeInContext</span>(<span class="self">self</span>.<span class="ident">ctx</span>) };
+ <span class="ident">Type::new</span>(<span class="ident">type_ref</span>)
+ }
+
+ <span class="doccomment">/// Get a type reference representing a `fn(args) -&gt; ret` function.</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_fn</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;llvm</span> <span class="self">self</span>, <span class="ident">args</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="ident">Type</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span>], <span class="ident">ret</span>: <span class="ident">Type</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Type</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span> {
+ <span class="kw">let</span> <span class="ident">type_ref</span> <span class="op">=</span> <span class="kw">unsafe</span> {
+ <span class="ident">LLVMFunctionType</span>(
+ <span class="ident">ret</span>,
+ <span class="ident">args</span>.<span class="ident">as_mut_ptr</span>(),
+ <span class="ident">args</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">libc::c_uint</span>,
+ <span class="number">0</span>, <span class="comment">/* IsVarArg */</span>
+ )
+ };
+ <span class="ident">Type::new</span>(<span class="ident">type_ref</span>)
+ }
+
+ <span class="doccomment">/// Add a function with the given `name` and `fn_type` to the module and return a value</span>
+ <span class="doccomment">/// reference representing the function.</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 `name` could not be converted to a</span>
+ <span class="doccomment">/// [`SmallCStr`].</span>
+ <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">add_fn</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;llvm</span> <span class="self">self</span>, <span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">fn_type</span>: <span class="ident">Type</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">FnValue</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span> {
+ <span class="macro">debug_assert_eq!</span>(
+ <span class="ident">fn_type</span>.<span class="ident">kind</span>(),
+ <span class="ident">LLVMTypeKind::LLVMFunctionTypeKind</span>,
+ <span class="string">&quot;Expected a function type when adding a function!&quot;</span>
+ );
+
+ <span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="ident">SmallCStr::try_from</span>(<span class="ident">name</span>)
+ .<span class="ident">expect</span>(<span class="string">&quot;Failed to convert &#39;name&#39; argument to small C string!&quot;</span>);
+
+ <span class="kw">let</span> <span class="ident">value_ref</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">LLVMAddFunction</span>(<span class="self">self</span>.<span class="ident">module</span>, <span class="ident">name</span>.<span class="ident">as_ptr</span>(), <span class="ident">fn_type</span>.<span class="ident">type_ref</span>()) };
+ <span class="ident">FnValue::new</span>(<span class="ident">value_ref</span>)
+ }
+
+ <span class="doccomment">/// Get a function value reference to the function with the given `name` if it was previously</span>
+ <span class="doccomment">/// added to the module with [`add_fn`][Module::add_fn].</span>
+ <span class="doccomment">///</span>
+ <span class="doccomment">/// # Panics</span>
+ <span class="doccomment">///</span>
+ <span class="doccomment">/// Panics if `name` could not be converted to a [`SmallCStr`].</span>
+ <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_fn</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;llvm</span> <span class="self">self</span>, <span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">FnValue</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span><span class="op">&gt;</span> {
+ <span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="ident">SmallCStr::try_from</span>(<span class="ident">name</span>)
+ .<span class="ident">expect</span>(<span class="string">&quot;Failed to convert &#39;name&#39; argument to small C string!&quot;</span>);
+
+ <span class="kw">let</span> <span class="ident">value_ref</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">LLVMGetNamedFunction</span>(<span class="self">self</span>.<span class="ident">module</span>, <span class="ident">name</span>.<span class="ident">as_ptr</span>()) };
+
+ (<span class="op">!</span><span class="ident">value_ref</span>.<span class="ident">is_null</span>()).<span class="ident">then</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">FnValue::new</span>(<span class="ident">value_ref</span>))
+ }
+
+ <span class="doccomment">/// Append a Basic Block to the end of the function referenced by the value reference</span>
+ <span class="doccomment">/// `fn_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">append_basic_block</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;llvm</span> <span class="self">self</span>, <span class="ident">fn_value</span>: <span class="ident">FnValue</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">BasicBlock</span><span class="op">&lt;</span><span class="lifetime">&#39;llvm</span><span class="op">&gt;</span> {
+ <span class="kw">let</span> <span class="ident">block</span> <span class="op">=</span> <span class="kw">unsafe</span> {
+ <span class="ident">LLVMAppendBasicBlockInContext</span>(
+ <span class="self">self</span>.<span class="ident">ctx</span>,
+ <span class="ident">fn_value</span>.<span class="ident">value_ref</span>(),
+ <span class="string">b&quot;block\0&quot;</span>.<span class="ident">as_ptr</span>().<span class="ident">cast</span>(),
+ )
+ };
+ <span class="macro">assert!</span>(<span class="op">!</span><span class="ident">block</span>.<span class="ident">is_null</span>());
+
+ <span class="ident">BasicBlock</span>(<span class="ident">block</span>, <span class="ident">PhantomData</span>)
+ }
+}
+
+<span class="kw">impl</span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">Module</span> {
+ <span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) {
+ <span class="kw">unsafe</span> {
+ <span class="comment">// In case we turned the module into a ThreadSafeModule, we must not dispose the module</span>
+ <span class="comment">// reference because ThreadSafeModule took ownership!</span>
+ <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">module</span>.<span class="ident">is_null</span>() {
+ <span class="ident">LLVMDisposeModule</span>(<span class="self">self</span>.<span class="ident">module</span>);
+ }
+
+ <span class="comment">// Dispose ThreadSafeContext reference (dec ref count) in any case.</span>
+ <span class="ident">LLVMOrcDisposeThreadSafeContext</span>(<span class="self">self</span>.<span class="ident">tsctx</span>);
+ }
+ }
+}
+</pre></div>
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