diff options
Diffstat (limited to 'src/Compilation.zig')
| -rw-r--r-- | src/Compilation.zig | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/Compilation.zig b/src/Compilation.zig index fae725a1ac..b6c82c2dbb 100644 --- a/src/Compilation.zig +++ b/src/Compilation.zig @@ -444,6 +444,7 @@ pub const InitOptions = struct { want_valgrind: ?bool = null, want_tsan: ?bool = null, want_compiler_rt: ?bool = null, + want_lto: ?bool = null, use_llvm: ?bool = null, use_lld: ?bool = null, use_clang: ?bool = null, @@ -602,6 +603,12 @@ pub fn create(gpa: *Allocator, options: InitOptions) !*Compilation { if (ofmt == .c) break :blk false; + if (options.want_lto) |lto| { + if (lto) { + break :blk true; + } + } + // Our linker can't handle objects or most advanced options yet. if (options.link_objects.len != 0 or options.c_source_files.len != 0 or @@ -647,6 +654,26 @@ pub fn create(gpa: *Allocator, options: InitOptions) !*Compilation { break :outer opts; } else .{}; + const lto = blk: { + if (options.want_lto) |explicit| { + if (!use_lld) + return error.LtoUnavailableWithoutLld; + break :blk explicit; + } else if (!use_lld) { + break :blk false; + } else if (options.c_source_files.len == 0) { + break :blk false; + } else if (darwin_options.system_linker_hack) { + break :blk false; + } else switch (options.output_mode) { + .Lib, .Obj => break :blk false, + .Exe => switch (options.optimize_mode) { + .Debug => break :blk false, + .ReleaseSafe, .ReleaseFast, .ReleaseSmall => break :blk true, + }, + } + }; + const tsan = options.want_tsan orelse false; const link_libc = options.link_libc or target_util.osRequiresLibC(options.target) or tsan; @@ -821,6 +848,7 @@ pub fn create(gpa: *Allocator, options: InitOptions) !*Compilation { cache.hash.add(ofmt); cache.hash.add(pic); cache.hash.add(pie); + cache.hash.add(lto); cache.hash.add(tsan); cache.hash.add(stack_check); cache.hash.add(red_zone); @@ -1022,6 +1050,7 @@ pub fn create(gpa: *Allocator, options: InitOptions) !*Compilation { .libc_installation = libc_dirs.libc_installation, .pic = pic, .pie = pie, + .lto = lto, .valgrind = valgrind, .tsan = tsan, .stack_check = stack_check, @@ -2233,6 +2262,9 @@ pub fn addCCArgs( "-nostdinc", "-fno-spell-checking", }); + if (comp.bin_file.options.lto) { + try argv.append("-flto"); + } // According to Rich Felker libc headers are supposed to go before C language headers. // However as noted by @dimenus, appending libc headers before c_headers breaks intrinsics @@ -3255,6 +3287,7 @@ fn updateStage1Module(comp: *Compilation, main_progress_node: *std.Progress.Node .err_color = @enumToInt(comp.color), .pic = comp.bin_file.options.pic, .pie = comp.bin_file.options.pie, + .lto = comp.bin_file.options.lto, .link_libc = comp.bin_file.options.link_libc, .link_libcpp = comp.bin_file.options.link_libcpp, .strip = comp.bin_file.options.strip, @@ -3415,6 +3448,10 @@ pub fn build_crt_file( .want_tsan = false, .want_pic = comp.bin_file.options.pic, .want_pie = comp.bin_file.options.pie, + .want_lto = switch (output_mode) { + .Lib => comp.bin_file.options.lto, + .Obj, .Exe => false, + }, .emit_h = null, .strip = comp.compilerRtStrip(), .is_native_os = comp.bin_file.options.is_native_os, |