extra target/codegen config

crates/cli/src/build.rs

@@ -1,7 +1,7 @@
 use bumpalo::Bump;
 use roc_build::{
     link::{link, preprocess_host_wasm32, rebuild_host, LinkType, LinkingStrategy},
-    program::{self, Problems},
+    program::{self, CodeGenOptions, Problems},
 };
 use roc_builtins::bitcode;
 use roc_collections::VecMap;
@@ -62,8 +62,7 @@ pub fn build_file<'a>(
     arena: &'a Bump,
     target: &Triple,
     app_module_path: PathBuf,
-    opt_level: OptLevel,
-    emit_debug_info: bool,
+    code_gen_options: CodeGenOptions,
     emit_timings: bool,
     link_type: LinkType,
     linking_strategy: LinkingStrategy,
@@ -123,7 +122,7 @@ pub fn build_file<'a>(
 
         match roc_target::OperatingSystem::from(target.operating_system) {
             Wasi => {
-                if matches!(opt_level, OptLevel::Development) {
+                if matches!(code_gen_options.opt_level, OptLevel::Development) {
                     ("wasm", "wasm", Some("wasm"))
                 } else {
                     ("zig", "bc", Some("wasm"))
@@ -182,7 +181,7 @@ pub fn build_file<'a>(
     };
 
     let rebuild_thread = spawn_rebuild_thread(
-        opt_level,
+        code_gen_options.opt_level,
         linking_strategy,
         prebuilt,
         host_input_path.clone(),
@@ -272,8 +271,7 @@ pub fn build_file<'a>(
         loaded,
         &app_module_path,
         target,
-        opt_level,
-        emit_debug_info,
+        code_gen_options,
         &preprocessed_host_path,
         wasm_dev_stack_bytes,
     );
@@ -352,7 +350,7 @@ pub fn build_file<'a>(
 
             let str_host_obj_path = bitcode::get_builtins_host_obj_path();
 
-            if matches!(opt_level, OptLevel::Development) {
+            if matches!(code_gen_options.backend, program::CodeGenBackend::Assembly) {
                 inputs.push(&str_host_obj_path);
             }
 

crates/cli/src/lib.rs

@@ -5,7 +5,7 @@ use build::BuiltFile;
 use bumpalo::Bump;
 use clap::{Arg, ArgMatches, Command, ValueSource};
 use roc_build::link::{LinkType, LinkingStrategy};
-use roc_build::program::Problems;
+use roc_build::program::{CodeGenBackend, CodeGenOptions, Problems};
 use roc_collections::VecMap;
 use roc_error_macros::{internal_error, user_error};
 use roc_intern::SingleThreadedInterner;
@@ -465,16 +465,30 @@ pub fn build(
 
     let arena = Bump::new();
     let filename = matches.value_of_os(ROC_FILE).unwrap();
-    let opt_level = match (
-        matches.is_present(FLAG_OPTIMIZE),
-        matches.is_present(FLAG_OPT_SIZE),
-        matches.is_present(FLAG_DEV),
-    ) {
-        (true, false, false) => OptLevel::Optimize,
-        (false, true, false) => OptLevel::Size,
-        (false, false, true) => OptLevel::Development,
-        (false, false, false) => OptLevel::Normal,
-        _ => user_error!("build can be only one of `--dev`, `--optimize`, or `--opt-size`"),
+
+    let code_gen_backend = if matches!(triple.architecture, Architecture::Wasm32) {
+        CodeGenBackend::Wasm
+    } else {
+        match matches.is_present(FLAG_DEV) {
+            true => CodeGenBackend::Assembly,
+            false => CodeGenBackend::Llvm,
+        }
+    };
+
+    let opt_level = if let BuildConfig::BuildAndRunIfNoErrors = config {
+        OptLevel::Development
+    } else {
+        match (
+            matches.is_present(FLAG_OPTIMIZE),
+            matches.is_present(FLAG_OPT_SIZE),
+        ) {
+            (true, false) => OptLevel::Optimize,
+            (false, true) => OptLevel::Size,
+            (false, false) => OptLevel::Normal,
+            (true, true) => {
+                user_error!("build can be only one of `--optimize` and `--opt-size`")
+            }
+        }
     };
     let emit_debug_info = matches.is_present(FLAG_DEBUG);
     let emit_timings = matches.is_present(FLAG_TIME);
@@ -490,7 +504,7 @@ pub fn build(
     };
 
     let wasm_dev_backend = matches!(opt_level, OptLevel::Development)
-        && matches!(triple.architecture, Architecture::Wasm32);
+        && matches!(code_gen_backend, CodeGenBackend::Wasm);
 
     let linking_strategy = if wasm_dev_backend {
         LinkingStrategy::Additive
@@ -541,12 +555,18 @@ pub fn build(
         BuildAndRunIfNoErrors => BuildOrdering::BuildIfChecks,
         _ => BuildOrdering::AlwaysBuild,
     };
+
+    let code_gen_options = CodeGenOptions {
+        backend: code_gen_backend,
+        opt_level,
+        emit_debug_info,
+    };
+
     let res_binary_path = build_file(
         &arena,
         &triple,
         path.to_path_buf(),
-        opt_level,
-        emit_debug_info,
+        code_gen_options,
         emit_timings,
         link_type,
         linking_strategy,
@@ -838,8 +858,6 @@ fn roc_run_native<I: IntoIterator<Item = S>, S: AsRef<OsStr>>(
             .chain([std::ptr::null()])
             .collect_in(arena);
 
-        let opt_level = OptLevel::Development;
-
         match opt_level {
             OptLevel::Development => roc_run_native_debug(
                 arena,

crates/compiler/build/src/program.rs

@@ -173,33 +173,47 @@ impl Deref for CodeObject {
     }
 }
 
+#[derive(Debug, Clone, Copy)]
+pub enum CodeGenBackend {
+    Assembly,
+    Llvm,
+    Wasm,
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct CodeGenOptions {
+    pub backend: CodeGenBackend,
+    pub opt_level: OptLevel,
+    pub emit_debug_info: bool,
+}
+
 #[allow(clippy::too_many_arguments)]
 pub fn gen_from_mono_module(
     arena: &bumpalo::Bump,
     loaded: MonomorphizedModule,
     roc_file_path: &Path,
     target: &target_lexicon::Triple,
-    opt_level: OptLevel,
-    emit_debug_info: bool,
+    code_gen_options: CodeGenOptions,
     preprocessed_host_path: &Path,
     wasm_dev_stack_bytes: Option<u32>,
 ) -> (CodeObject, CodeGenTiming) {
-    match opt_level {
-        OptLevel::Normal | OptLevel::Size | OptLevel::Optimize => gen_from_mono_module_llvm(
-            arena,
-            loaded,
-            roc_file_path,
-            target,
-            opt_level,
-            emit_debug_info,
-        ),
-        OptLevel::Development => gen_from_mono_module_dev(
+    match code_gen_options.backend {
+        CodeGenBackend::Assembly => gen_from_mono_module_dev(
             arena,
             loaded,
             target,
             preprocessed_host_path,
             wasm_dev_stack_bytes,
         ),
+        CodeGenBackend::Llvm => gen_from_mono_module_llvm(
+            arena,
+            loaded,
+            roc_file_path,
+            target,
+            code_gen_options.opt_level,
+            code_gen_options.emit_debug_info,
+        ),
+        CodeGenBackend::Wasm => unreachable!(),
     }
 }