lib/compilers/rust.js

// Copyright (c) 2016, Compiler Explorer Authors
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
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//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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import path from 'path';

import _ from 'underscore';

import { BaseCompiler } from '../base-compiler';
import { parseRustOutput } from '../utils';

import { RustParser } from './argument-parsers';

export class RustCompiler extends BaseCompiler {
    static get key() { return 'rust'; }

    constructor(info, env) {
        super(info, env);
        this.compiler.supportsIntel = true;
        this.compiler.supportsIrView = true;
        this.compiler.supportsRustMirView = true;

        const isNightly = info.name === 'nightly' || info.semver === 'nightly';
        // Macro expansion (-Zunpretty=expanded) and HIR (-Zunpretty=hir-tree)
        // are only available for Nightly
        this.compiler.supportsRustMacroExpView = isNightly;
        this.compiler.supportsRustHirView = isNightly;

        this.compiler.irArg = ['--emit', 'llvm-ir'];
        this.linker = this.compilerProps('linker');
    }

    getSharedLibraryPathsAsArguments() {
        return [];
    }

    optionsForBackend(backendOptions, outputFilename) {
        // The super class handles the GCC dump files that may be needed by
        // rustc-cg-gcc subclass.
        const opts = super.optionsForBackend (backendOptions, outputFilename);

        if (backendOptions.produceRustMir && this.compiler.supportsRustMirView) {
            const of = this.getRustMirOutputFilename(outputFilename);
            opts.push('--emit', `mir=${of}`);
        }
        return opts;
    }

    optionsForFilter(filters, outputFilename, userOptions) {
        let options = ['-C', 'debuginfo=1', '-o', this.filename(outputFilename)];

        const userRequestedEmit = _.any(userOptions, opt => opt.includes('--emit'));
        if (filters.binary) {
            options = options.concat(['--crate-type', 'bin']);
            if (this.linker) {
                options = options.concat(`-Clinker=${this.linker}`);
            }
        } else if (!filters.binary) {
            if (!userRequestedEmit) {
                options = options.concat('--emit', 'asm');
            }
            if (filters.intel) options = options.concat('-Cllvm-args=--x86-asm-syntax=intel');
            options = options.concat(['--crate-type', 'rlib']);
        }
        return options;
    }

    // Override the IR file name method for rustc because the output file is different from clang.
    getIrOutputFilename(inputFilename) {
        return this.getOutputFilename(path.dirname(inputFilename), this.outputFilebase)
            .replace('.s', '.ll');
    }

    getArgumentParser() {
        return RustParser;
    }

    isCfgCompiler(/*compilerVersion*/) {
        return true;
    }

    parseCompilationOutput(result, inputFilename) {
        result.stdout = parseRustOutput(result.stdout, inputFilename);
        result.stderr = parseRustOutput(result.stderr, inputFilename);
    }
}