111 lines
3.1 KiB
Rust
111 lines
3.1 KiB
Rust
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// This test checks that the object files we generate are actually
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// LLVM bitcode files (as used by linker LTO plugins) when compiling with
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// -Clinker-plugin-lto.
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// See https://github.com/rust-lang/rust/pull/50000
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#![feature(path_file_prefix)]
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use std::path::PathBuf;
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use run_make_support::{
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cwd, has_extension, has_prefix, llvm_ar, llvm_bcanalyzer, path, rfs, rust_lib_name, rustc,
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shallow_find_files, static_lib_name,
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};
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fn main() {
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check_bitcode(LibBuild {
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source: path("lib.rs"),
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crate_type: Some("staticlib"),
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output: path(static_lib_name("liblib")),
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lto: None,
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emit_obj: false,
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});
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check_bitcode(LibBuild {
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source: path("lib.rs"),
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crate_type: Some("staticlib"),
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output: path(static_lib_name("liblib-fat-lto")),
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lto: Some("fat"),
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emit_obj: false,
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});
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check_bitcode(LibBuild {
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source: path("lib.rs"),
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crate_type: Some("staticlib"),
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output: path(static_lib_name("liblib-thin-lto")),
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lto: Some("thin"),
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emit_obj: false,
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});
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check_bitcode(LibBuild {
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source: path("lib.rs"),
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crate_type: Some("rlib"),
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output: path(rust_lib_name("liblib")),
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lto: None,
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emit_obj: false,
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});
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check_bitcode(LibBuild {
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source: path("lib.rs"),
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crate_type: Some("cdylib"),
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output: path("cdylib.o"),
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lto: None,
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emit_obj: true,
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});
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check_bitcode(LibBuild {
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source: path("lib.rs"),
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crate_type: Some("dylib"),
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output: path("rdylib.o"),
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lto: None,
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emit_obj: true,
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});
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check_bitcode(LibBuild {
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source: path("main.rs"),
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crate_type: None,
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output: path("exe.o"),
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lto: None,
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emit_obj: true,
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});
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}
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#[track_caller]
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fn check_bitcode(instructions: LibBuild) {
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let mut rustc = rustc();
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rustc
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.input(instructions.source)
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.output(&instructions.output)
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.opt_level("2")
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.codegen_units(1)
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.arg("-Clinker-plugin-lto");
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if instructions.emit_obj {
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rustc.emit("obj");
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}
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if let Some(crate_type) = instructions.crate_type {
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rustc.crate_type(crate_type);
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}
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if let Some(lto) = instructions.lto {
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rustc.arg(format!("-Clto={lto}"));
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}
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rustc.run();
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if instructions.output.extension().unwrap() != "o" {
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// Remove all potential leftover object files, then turn the output into an object file.
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for object in shallow_find_files(cwd(), |path| has_extension(path, "o")) {
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rfs::remove_file(object);
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}
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llvm_ar().extract().arg(&instructions.output).run();
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}
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for object in shallow_find_files(cwd(), |path| {
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has_prefix(path, instructions.output.file_prefix().unwrap().to_str().unwrap())
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&& has_extension(path, "o")
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}) {
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// All generated object files should be LLVM bitcode files - this will fail otherwise.
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llvm_bcanalyzer().input(object).run();
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}
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}
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struct LibBuild {
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source: PathBuf,
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crate_type: Option<&'static str>,
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output: PathBuf,
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lto: Option<&'static str>,
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emit_obj: bool,
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}
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