Skip to content
This repository was archived by the owner on May 28, 2025. It is now read-only.

Commit 8bc4863

Browse files
antoyoantoyo
committed
Fix for ThinLTO
1 parent 747924a commit 8bc4863

File tree

1 file changed

+65
-36
lines changed

1 file changed

+65
-36
lines changed

‎src/back/write.rs

Lines changed: 65 additions & 36 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@ use rustc_codegen_ssa::back::write::{BitcodeSection, CodegenContext, EmitObj, Mo
66
use rustc_codegen_ssa::{CompiledModule, ModuleCodegen};
77
use rustc_errors::DiagCtxtHandle;
88
use rustc_fs_util::link_or_copy;
9-
use rustc_session::config::OutputType;
9+
use rustc_session::config::{Lto, OutputType};
1010
use rustc_span::fatal_error::FatalError;
1111
use rustc_target::spec::SplitDebuginfo;
1212

@@ -42,45 +42,74 @@ pub(crate) unsafe fn codegen(
4242
let bc_out = cgcx.output_filenames.temp_path(OutputType::Bitcode, module_name);
4343
let obj_out = cgcx.output_filenames.temp_path(OutputType::Object, module_name);
4444

45-
if config.bitcode_needed() && fat_lto {
46-
let _timer = cgcx
47-
.prof
48-
.generic_activity_with_arg("GCC_module_codegen_make_bitcode", &*module.name);
49-
50-
// TODO(antoyo)
51-
/*if let Some(bitcode_filename) = bc_out.file_name() {
52-
cgcx.prof.artifact_size(
53-
"llvm_bitcode",
54-
bitcode_filename.to_string_lossy(),
55-
data.len() as u64,
56-
);
57-
}*/
58-
59-
if config.emit_bc || config.emit_obj == EmitObj::Bitcode {
45+
if config.bitcode_needed() {
46+
if fat_lto {
6047
let _timer = cgcx
6148
.prof
62-
.generic_activity_with_arg("GCC_module_codegen_emit_bitcode", &*module.name);
63-
context.add_command_line_option("-flto=auto");
64-
context.add_command_line_option("-flto-partition=one");
65-
// TODO: remove since we don't want fat objects when it is for Bitcode only.
66-
context.add_command_line_option("-ffat-lto-objects");
67-
context
68-
.compile_to_file(OutputKind::ObjectFile, bc_out.to_str().expect("path to str"));
49+
.generic_activity_with_arg("GCC_module_codegen_make_bitcode", &*module.name);
50+
51+
// TODO(antoyo)
52+
/*if let Some(bitcode_filename) = bc_out.file_name() {
53+
cgcx.prof.artifact_size(
54+
"llvm_bitcode",
55+
bitcode_filename.to_string_lossy(),
56+
data.len() as u64,
57+
);
58+
}*/
59+
60+
if config.emit_bc || config.emit_obj == EmitObj::Bitcode {
61+
let _timer = cgcx
62+
.prof
63+
.generic_activity_with_arg("GCC_module_codegen_emit_bitcode", &*module.name);
64+
context.add_command_line_option("-flto=auto");
65+
context.add_command_line_option("-flto-partition=one");
66+
// TODO: remove since we don't want fat objects when it is for Bitcode only.
67+
context.add_command_line_option("-ffat-lto-objects");
68+
context
69+
.compile_to_file(OutputKind::ObjectFile, bc_out.to_str().expect("path to str"));
70+
}
71+
72+
if config.emit_obj == EmitObj::ObjectCode(BitcodeSection::Full) {
73+
let _timer = cgcx
74+
.prof
75+
.generic_activity_with_arg("GCC_module_codegen_embed_bitcode", &*module.name);
76+
// TODO(antoyo): maybe we should call embed_bitcode to have the proper iOS fixes?
77+
//embed_bitcode(cgcx, llcx, llmod, &config.bc_cmdline, data);
78+
79+
context.add_command_line_option("-flto=auto");
80+
context.add_command_line_option("-flto-partition=one");
81+
context.add_command_line_option("-ffat-lto-objects");
82+
// TODO(antoyo): Send -plugin/usr/lib/gcc/x86_64-pc-linux-gnu/11.1.0/liblto_plugin.so to linker (this should be done when specifying the appropriate rustc cli argument).
83+
context
84+
.compile_to_file(OutputKind::ObjectFile, bc_out.to_str().expect("path to str"));
85+
}
6986
}
87+
else {
88+
if config.emit_bc || config.emit_obj == EmitObj::Bitcode {
89+
let _timer = cgcx
90+
.prof
91+
.generic_activity_with_arg("GCC_module_codegen_emit_bitcode", &*module.name);
92+
context
93+
.compile_to_file(OutputKind::ObjectFile, bc_out.to_str().expect("path to str"));
94+
}
7095

71-
if config.emit_obj == EmitObj::ObjectCode(BitcodeSection::Full) {
72-
let _timer = cgcx
73-
.prof
74-
.generic_activity_with_arg("GCC_module_codegen_embed_bitcode", &*module.name);
75-
// TODO(antoyo): maybe we should call embed_bitcode to have the proper iOS fixes?
76-
//embed_bitcode(cgcx, llcx, llmod, &config.bc_cmdline, data);
77-
78-
context.add_command_line_option("-flto=auto");
79-
context.add_command_line_option("-flto-partition=one");
80-
context.add_command_line_option("-ffat-lto-objects");
81-
// TODO(antoyo): Send -plugin/usr/lib/gcc/x86_64-pc-linux-gnu/11.1.0/liblto_plugin.so to linker (this should be done when specifying the appropriate rustc cli argument).
82-
context
83-
.compile_to_file(OutputKind::ObjectFile, bc_out.to_str().expect("path to str"));
96+
if config.emit_obj == EmitObj::ObjectCode(BitcodeSection::Full) {
97+
// TODO: we might want to emit to emit an error here, saying to set the
98+
// environment variable EMBED_LTO_BITCODE.
99+
unreachable!();
100+
let _timer = cgcx
101+
.prof
102+
.generic_activity_with_arg("GCC_module_codegen_embed_bitcode", &*module.name);
103+
// TODO(antoyo): maybe we should call embed_bitcode to have the proper iOS fixes?
104+
//embed_bitcode(cgcx, llcx, llmod, &config.bc_cmdline, data);
105+
106+
context.add_command_line_option("-flto=auto");
107+
context.add_command_line_option("-flto-partition=one");
108+
context.add_command_line_option("-ffat-lto-objects");
109+
// TODO(antoyo): Send -plugin/usr/lib/gcc/x86_64-pc-linux-gnu/11.1.0/liblto_plugin.so to linker (this should be done when specifying the appropriate rustc cli argument).
110+
context
111+
.compile_to_file(OutputKind::ObjectFile, bc_out.to_str().expect("path to str"));
112+
}
84113
}
85114
}
86115

0 commit comments

Comments
 (0)