Rename --always-cranelift to --cranelift.

Also, enable use of Lightbeam in wasm2obj.

build.rs

@@ -15,9 +15,9 @@ fn main() {
         .expect("error generating test source file");
 
     for strategy in &[
-        "AlwaysCranelift",
+        "Cranelift",
         #[cfg(feature = "lightbeam")]
-        "AlwaysLightbeam",
+        "Lightbeam",
     ] {
         writeln!(out, "#[allow(non_snake_case)]").expect("generating tests");
         writeln!(out, "mod {} {{", strategy).expect("generating tests");
@@ -151,11 +151,11 @@ fn write_testsuite_tests(
 fn ignore(testsuite: &str, name: &str, strategy: &str) -> bool {
     match strategy {
         #[cfg(feature = "lightbeam")]
-        "AlwaysLightbeam" => match (testsuite, name) {
+        "Lightbeam" => match (testsuite, name) {
             ("single_file_spec_test", "simd_const") => return true,
             _ => (),
         },
-        "AlwaysCranelift" => {}
+        "Cranelift" => {}
         _ => panic!("unrecognized strategy"),
     }
 

fuzz/fuzz_targets/compile.rs

@@ -24,7 +24,7 @@ fuzz_target!(|data: &[u8]| {
         panic!("host machine is not a supported target");
     });
     let isa = isa_builder.finish(settings::Flags::new(flag_builder));
-    let mut compiler = Compiler::new(isa, CompilationStrategy::AlwaysCranelift);
+    let mut compiler = Compiler::new(isa, CompilationStrategy::Cranelift);
     let mut resolver = NullResolver {};
     let global_exports = Rc::new(RefCell::new(HashMap::new()));
     let _compiled =
@@ -44,7 +44,7 @@ fuzz_target!(|data: &[u8]| {
         panic!("host machine is not a supported target");
     });
     let isa = isa_builder.finish(settings::Flags::new(flag_builder));
-    let mut compiler = Compiler::new(isa, CompilationStrategy::AlwaysLightbeam);
+    let mut compiler = Compiler::new(isa, CompilationStrategy::Lightbeam);
     let mut resolver = NullResolver {};
     let global_exports = Rc::new(RefCell::new(HashMap::new()));
     let _compiled =

src/bin/wasm2obj.rs

@@ -49,11 +49,13 @@ use std::process;
 use std::str;
 use std::str::FromStr;
 use target_lexicon::Triple;
+use wasmtime::pick_compilation_strategy;
 use wasmtime_debug::{emit_debugsections, read_debuginfo};
 use wasmtime_environ::{cache_create_new_config, cache_init};
 use wasmtime_environ::{
     Compiler, Cranelift, ModuleEnvironment, ModuleVmctxInfo, Tunables, VMOffsets,
 };
+use wasmtime_jit::CompilationStrategy;
 use wasmtime_obj::emit_module;
 
 const USAGE: &str = "
@@ -63,7 +65,7 @@ The translation is dependent on the environment chosen.
 The default is a dummy environment that produces placeholder values.
 
 Usage:
-    wasm2obj [--target TARGET] [-Odg] [--disable-cache | --cache-config=<cache_config_file>] [--enable-simd] [--always-lightbeam | --always-cranelift] <file> -o <output>
+    wasm2obj [--target TARGET] [-Odg] [--disable-cache | --cache-config=<cache_config_file>] [--enable-simd] [--lightbeam | --cranelift] <file> -o <output>
     wasm2obj --create-cache-config [--cache-config=<cache_config_file>]
     wasm2obj --help | --version
 
@@ -80,8 +82,8 @@ Options:
                         creates default configuration and writes it to the disk,
                         use with --cache-config to specify custom config file
                         instead of default one
-    --always-lightbeam  use Lightbeam for all compilation
-    --always-cranelift  use Cranelift for all compilation
+    --lightbeam         use Lightbeam for all compilation
+    --cranelift         use Cranelift for all compilation
     --enable-simd       enable proposed SIMD instructions
     -O, --optimize      runs optimization passes on the translated functions
     --version           print the Cranelift version
@@ -99,8 +101,8 @@ struct Args {
     flag_cache_config: Option<String>,
     flag_create_cache_config: bool,
     flag_enable_simd: bool,
-    flag_always_lightbeam: bool,
-    flag_always_cranelift: bool,
+    flag_lightbeam: bool,
+    flag_cranelift: bool,
     flag_optimize: bool,
 }
 
@@ -168,6 +170,8 @@ fn main() {
         args.flag_g,
         args.flag_enable_simd,
         args.flag_optimize,
+        args.flag_cranelift,
+        args.flag_lightbeam,
     ) {
         Ok(()) => {}
         Err(message) => {
@@ -184,6 +188,8 @@ fn handle_module(
     generate_debug_info: bool,
     enable_simd: bool,
     enable_optimize: bool,
+    cranelift: bool,
+    lightbeam: bool,
 ) -> Result<(), String> {
     let data = match read_wasm_file(path) {
         Ok(data) => data,
@@ -227,6 +233,9 @@ fn handle_module(
     // TODO: Expose the tunables as command-line flags.
     let tunables = Tunables::default();
 
+    // Decide how to compile.
+    let strategy = pick_compilation_strategy(cranelift, lightbeam);
+
     let (module, lazy_function_body_inputs, lazy_data_initializers, target_config) = {
         let environ = ModuleEnvironment::new(isa.frontend_config(), tunables);
 
@@ -244,13 +253,25 @@ fn handle_module(
 
     // TODO: use the traps information
     let (compilation, relocations, address_transform, value_ranges, stack_slots, _traps) =
-        Cranelift::compile_module(
-            &module,
-            lazy_function_body_inputs,
-            &*isa,
-            generate_debug_info,
-        )
-        .map_err(|e| e.to_string())?;
+        match strategy {
+            CompilationStrategy::Auto | CompilationStrategy::Cranelift => {
+                Cranelift::compile_module(
+                    &module,
+                    lazy_function_body_inputs,
+                    &*isa,
+                    generate_debug_info,
+                )
+                .map_err(|e| e.to_string())?
+            }
+            #[cfg(feature = "lightbeam")]
+            CompilationStrategy::Lightbeam => Lightbeam::compile_module(
+                &module,
+                lazy_function_body_inputs,
+                &*isa,
+                generate_debug_info,
+            )
+            .map_err(|e| e.to_string())?,
+        };
 
     let module_vmctx_info = {
         let ofs = VMOffsets::new(target_config.pointer_bytes(), &module);

src/bin/wasmtime.rs

@@ -63,8 +63,8 @@ including calling the start function if one is present. Additional functions
 given with --invoke are then called.
 
 Usage:
-    wasmtime [-odg] [--enable-simd] [--wasi-c] [--disable-cache | --cache-config=<cache_config_file>] [--preload=<wasm>...] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] [--always-lightbeam | --always-cranelift] <file> [<arg>...]
-    wasmtime [-odg] [--enable-simd] [--wasi-c] [--disable-cache | --cache-config=<cache_config_file>] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] --invoke=<fn> [--always-lightbeam | --always-cranelift] <file> [<arg>...]
+    wasmtime [-odg] [--enable-simd] [--wasi-c] [--disable-cache | --cache-config=<cache_config_file>] [--preload=<wasm>...] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] [--lightbeam | --cranelift] <file> [<arg>...]
+    wasmtime [-odg] [--enable-simd] [--wasi-c] [--disable-cache | --cache-config=<cache_config_file>] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] --invoke=<fn> [--lightbeam | --cranelift] <file> [<arg>...]
     wasmtime --create-cache-config [--cache-config=<cache_config_file>]
     wasmtime --help | --version
 
@@ -81,8 +81,8 @@ Options:
                         instead of default one
     -g                  generate debug information
     -d, --debug         enable debug output on stderr/stdout
-    --always-lightbeam  use Lightbeam for all compilation
-    --always-cranelift  use Cranelift for all compilation
+    --lightbeam         use Lightbeam for all compilation
+    --cranelift         use Cranelift for all compilation
     --enable-simd       enable proposed SIMD instructions
     --wasi-c            enable the wasi-c implementation of WASI
     --preload=<wasm>    load an additional wasm module before loading the main module
@@ -105,8 +105,8 @@ struct Args {
     flag_debug: bool,
     flag_g: bool,
     flag_enable_simd: bool,
-    flag_always_lightbeam: bool,
-    flag_always_cranelift: bool,
+    flag_lightbeam: bool,
+    flag_cranelift: bool,
     flag_invoke: Option<String>,
     flag_preload: Vec<String>,
     flag_env: Vec<String>,
@@ -287,8 +287,7 @@ fn rmain() -> Result<(), Error> {
     }
 
     // Decide how to compile.
-    let strategy =
-        pick_compilation_strategy(args.flag_always_cranelift, args.flag_always_lightbeam);
+    let strategy = pick_compilation_strategy(args.flag_cranelift, args.flag_lightbeam);
 
     let config = Config::new(
         settings::Flags::new(flag_builder),

src/bin/wast.rs

@@ -42,7 +42,7 @@ const USAGE: &str = "
 Wast test runner.
 
 Usage:
-    wast [-do] [--enable-simd] [--disable-cache | --cache-config=<cache_config_file>] [--always-lightbeam | --always-cranelift] <file>...
+    wast [-do] [--enable-simd] [--disable-cache | --cache-config=<cache_config_file>] [--lightbeam | --cranelift] <file>...
     wast --create-cache-config [--cache-config=<cache_config_file>]
     wast --help | --version
 
@@ -58,8 +58,8 @@ Options:
                         creates default configuration and writes it to the disk,
                         use with --cache-config to specify custom config file
                         instead of default one
-    --always-lightbeam  use Lightbeam for all compilation
-    --always-cranelift  use Cranelift for all compilation
+    --lightbeam         use Lightbeam for all compilation
+    --cranelift         use Cranelift for all compilation
     -d, --debug         enable debug output on stderr/stdout
     --enable-simd       enable proposed SIMD instructions
 ";

src/lib.rs

@@ -7,14 +7,12 @@ pub fn pick_compilation_strategy(
     // Decide how to compile.
     match (always_lightbeam, always_cranelift) {
         #[cfg(feature = "lightbeam")]
-        (true, false) => CompilationStrategy::AlwaysLightbeam,
+        (true, false) => CompilationStrategy::Lightbeam,
         #[cfg(not(feature = "lightbeam"))]
-        (true, false) => panic!("--always-lightbeam given, but Lightbeam support is not enabled"),
-        (false, true) => CompilationStrategy::AlwaysCranelift,
+        (true, false) => panic!("--lightbeam given, but Lightbeam support is not enabled"),
+        (false, true) => CompilationStrategy::Cranelift,
         (false, false) => CompilationStrategy::Auto,
-        (true, true) => {
-            panic!("Can't enable --always-cranelift and --always-lightbeam at the same time")
-        }
+        (true, true) => panic!("Can't enable --cranelift and --lightbeam at the same time"),
     }
 }
 

wasmtime-jit/src/compiler.rs

@@ -32,11 +32,11 @@ pub enum CompilationStrategy {
     Auto,
 
     /// Compile all functions with Cranelift.
-    AlwaysCranelift,
+    Cranelift,
 
     /// Compile all functions with Lightbeam.
     #[cfg(feature = "lightbeam")]
-    AlwaysLightbeam,
+    Lightbeam,
 }
 
 /// A WebAssembly code JIT compiler.
@@ -117,9 +117,9 @@ impl Compiler {
     > {
         let (compilation, relocations, address_transform, value_ranges, stack_slots, traps) =
             match self.strategy {
-                // For now, interpret `Auto` as `AlwaysCranelift` since that's the most stable
+                // For now, interpret `Auto` as `Cranelift` since that's the most stable
                 // implementation.
-                CompilationStrategy::Auto | CompilationStrategy::AlwaysCranelift => {
+                CompilationStrategy::Auto | CompilationStrategy::Cranelift => {
                     wasmtime_environ::cranelift::Cranelift::compile_module(
                         module,
                         function_body_inputs,
@@ -128,7 +128,7 @@ impl Compiler {
                     )
                 }
                 #[cfg(feature = "lightbeam")]
-                CompilationStrategy::AlwaysLightbeam => {
+                CompilationStrategy::Lightbeam => {
                     wasmtime_environ::lightbeam::Lightbeam::compile_module(
                         module,
                         function_body_inputs,