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LLVM Bitcode Linker: Add as a linker known to the compiler

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This commit is contained in:
Kjetil Kjeka
2024-02-06 19:46:12 +01:00
parent af42d2a4b2
commit 43f2055af5
4 changed files with 142 additions and 9 deletions
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23
compiler/rustc_codegen_ssa/src/back/link.rs
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@@ -24,6 +24,7 @@ use rustc_span::symbol::Symbol;
use rustc_target::spec::crt_objects::CrtObjects;
use rustc_target::spec::LinkSelfContainedComponents;
use rustc_target::spec::LinkSelfContainedDefault;
use rustc_target::spec::LinkerFlavorCli;
use rustc_target::spec::{Cc, LinkOutputKind, LinkerFlavor, Lld, PanicStrategy};
use rustc_target::spec::{RelocModel, RelroLevel, SanitizerSet, SplitDebuginfo};
@@ -1350,6 +1351,7 @@ pub fn linker_and_flavor(sess: &Session) -> (PathBuf, LinkerFlavor) {
}
}
LinkerFlavor::Bpf => "bpf-linker",
LinkerFlavor::Llbc => "llvm-bitcode-linker",
LinkerFlavor::Ptx => "rust-ptx-linker",
}),
flavor,
@@ -1367,8 +1369,17 @@ pub fn linker_and_flavor(sess: &Session) -> (PathBuf, LinkerFlavor) {
// linker and linker flavor specified via command line have precedence over what the target
// specification specifies
let linker_flavor =
sess.opts.cg.linker_flavor.map(|flavor| sess.target.linker_flavor.with_cli_hints(flavor));
let linker_flavor = match sess.opts.cg.linker_flavor {
// The linker flavors that are non-target specific can be directly translated to LinkerFlavor
Some(LinkerFlavorCli::Llbc) => Some(LinkerFlavor::Llbc),
Some(LinkerFlavorCli::Ptx) => Some(LinkerFlavor::Ptx),
// The linker flavors that corresponds to targets needs logic that keeps the base LinkerFlavor
_ => sess
.opts
.cg
.linker_flavor
.map(|flavor| sess.target.linker_flavor.with_cli_hints(flavor)),
};
if let Some(ret) = infer_from(sess, sess.opts.cg.linker.clone(), linker_flavor) {
return ret;
}
@@ -2338,8 +2349,12 @@ fn add_order_independent_options(
});
}
if flavor == LinkerFlavor::Ptx {
// Provide the linker with fallback to internal `target-cpu`.
if flavor == LinkerFlavor::Llbc {
cmd.arg("--target");
cmd.arg(sess.target.llvm_target.as_ref());
cmd.arg("--target-cpu");
cmd.arg(&codegen_results.crate_info.target_cpu);
} else if flavor == LinkerFlavor::Ptx {
cmd.arg("--fallback-arch");
cmd.arg(&codegen_results.crate_info.target_cpu);
} else if flavor == LinkerFlavor::Bpf {