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| author | bjorn3 <bjorn3@users.noreply.github.com> | 2021-05-26 14:00:58 +0200 |
|---|---|---|
| committer | bjorn3 <bjorn3@users.noreply.github.com> | 2021-05-26 14:00:58 +0200 |
| commit | 39ffd9ae4aec7d908dabc9a7b1f384956e197978 (patch) | |
| tree | 197005e7612b6fb8a6a1d3f7235267d8df85c32c | |
| parent | f8c2a7ec00923ce12c14df5e246c665ea445fb6b (diff) | |
| download | rust-39ffd9ae4aec7d908dabc9a7b1f384956e197978.tar.gz rust-39ffd9ae4aec7d908dabc9a7b1f384956e197978.zip | |
Allow switching the regalloc algorithm from the commandline
| -rw-r--r-- | src/config.rs | 9 | ||||
| -rw-r--r-- | src/lib.rs | 2 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/config.rs b/src/config.rs index e59a0cb0a23..eef3c8c8d6e 100644 --- a/src/config.rs +++ b/src/config.rs @@ -48,6 +48,12 @@ pub struct BackendConfig { /// Can be set using `-Cllvm-args=display_cg_time=...`. pub display_cg_time: bool, + /// The register allocator to use. + /// + /// Defaults to the value of `CG_CLIF_REGALLOC` or `backtracking` otherwise. Can be set using + /// `-Cllvm-args=regalloc=...`. + pub regalloc: String, + /// Enable the Cranelift ir verifier for all compilation passes. If not set it will only run /// once before passing the clif ir to Cranelift for compilation. /// @@ -74,6 +80,8 @@ impl Default for BackendConfig { args.split(' ').map(|arg| arg.to_string()).collect() }, display_cg_time: bool_env_var("CG_CLIF_DISPLAY_CG_TIME"), + regalloc: std::env::var("CG_CLIF_REGALLOC") + .unwrap_or_else(|_| "backtracking".to_string()), enable_verifier: cfg!(debug_assertions) || bool_env_var("CG_CLIF_ENABLE_VERIFIER"), disable_incr_cache: bool_env_var("CG_CLIF_DISABLE_INCR_CACHE"), } @@ -93,6 +101,7 @@ impl BackendConfig { match name { "mode" => config.codegen_mode = value.parse()?, "display_cg_time" => config.display_cg_time = parse_bool(name, value)?, + "regalloc" => config.regalloc = value.to_string(), "enable_verifier" => config.enable_verifier = parse_bool(name, value)?, "disable_incr_cache" => config.disable_incr_cache = parse_bool(name, value)?, _ => return Err(format!("Unknown option `{}`", name)), diff --git a/src/lib.rs b/src/lib.rs index a9475997f75..4ee887cd5af 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -256,6 +256,8 @@ fn build_isa(sess: &Session, backend_config: &BackendConfig) -> Box<dyn isa::Tar flags_builder.set("enable_llvm_abi_extensions", "true").unwrap(); + flags_builder.set("regalloc", &backend_config.regalloc).unwrap(); + use rustc_session::config::OptLevel; match sess.opts.optimize { OptLevel::No => { |