Adding "optimization-passes" option

src/cmd/build.rs

@@ -29,8 +29,8 @@ use crate::{
     crate_metadata::CrateMetadata,
     maybe_println, util, validate_wasm,
     workspace::{ManifestPath, Profile, Workspace},
-    BuildArtifacts, BuildResult, OptimizationResult, UnstableFlags, UnstableOptions, Verbosity,
-    VerbosityFlags,
+    BuildArtifacts, BuildResult, OptimizationFlags, OptimizationPasses, OptimizationResult,
+    UnstableFlags, UnstableOptions, Verbosity, VerbosityFlags,
 };
 use anyhow::{Context, Result};
 use colored::Colorize;
@@ -66,6 +66,8 @@ pub struct BuildCommand {
     verbosity: VerbosityFlags,
     #[structopt(flatten)]
     unstable_options: UnstableOptions,
+    #[structopt(flatten)]
+    optimization_passes: OptimizationFlags,
 }
 
 impl BuildCommand {
@@ -74,12 +76,15 @@ impl BuildCommand {
         let unstable_flags: UnstableFlags =
             TryFrom::<&UnstableOptions>::try_from(&self.unstable_options)?;
         let verbosity = TryFrom::<&VerbosityFlags>::try_from(&self.verbosity)?;
+        let optimization_passes =
+            TryFrom::<&OptimizationFlags>::try_from(&self.optimization_passes)?;
         execute(
             &manifest_path,
             verbosity,
             true,
             self.build_artifact,
             unstable_flags,
+            optimization_passes,
         )
     }
 }
@@ -102,12 +107,14 @@ impl CheckCommand {
         let unstable_flags: UnstableFlags =
             TryFrom::<&UnstableOptions>::try_from(&self.unstable_options)?;
         let verbosity: Verbosity = TryFrom::<&VerbosityFlags>::try_from(&self.verbosity)?;
+        let optimization_passes = OptimizationPasses::Zero;
         execute(
             &manifest_path,
             verbosity,
             false,
             BuildArtifacts::CheckOnly,
             unstable_flags,
+            optimization_passes,
         )
     }
 }
@@ -268,14 +275,16 @@ fn post_process_wasm(crate_metadata: &CrateMetadata) -> Result<()> {
 ///
 /// The intention is to reduce the size of bloated wasm binaries as a result of missing
 /// optimizations (or bugs?) between Rust and Wasm.
-fn optimize_wasm(crate_metadata: &CrateMetadata) -> Result<OptimizationResult> {
+fn optimize_wasm(
+    crate_metadata: &CrateMetadata,
+    optimization_passes: OptimizationPasses,
+) -> Result<OptimizationResult> {
     let mut dest_optimized = crate_metadata.dest_wasm.clone();
     dest_optimized.set_file_name(format!("{}-opt.wasm", crate_metadata.package_name));
-
     let _ = do_optimization(
         crate_metadata.dest_wasm.as_os_str(),
         &dest_optimized.as_os_str(),
-        3,
+        optimization_passes,
     )?;
 
     let original_size = metadata(&crate_metadata.dest_wasm)?.len() as f64 / 1000.0;
@@ -299,17 +308,17 @@ fn optimize_wasm(crate_metadata: &CrateMetadata) -> Result<OptimizationResult> {
 fn do_optimization(
     dest_wasm: &OsStr,
     dest_optimized: &OsStr,
-    optimization_level: u32,
+    optimization_level: OptimizationPasses,
 ) -> Result<()> {
     let mut dest_wasm_file = File::open(dest_wasm)?;
     let mut dest_wasm_file_content = Vec::new();
     dest_wasm_file.read_to_end(&mut dest_wasm_file_content)?;
 
     let codegen_config = binaryen::CodegenConfig {
         // number of optimization passes (spends potentially a lot of time optimizing)
-        optimization_level,
+        optimization_level: optimization_level.to_passes(),
         // the default
-        shrink_level: 1,
+        shrink_level: optimization_level.to_shrink(),
         // the default
         debug_info: false,
     };
@@ -334,7 +343,7 @@ fn do_optimization(
 fn do_optimization(
     dest_wasm: &OsStr,
     dest_optimized: &OsStr,
-    optimization_level: u32,
+    optimization_level: OptimizationPasses,
 ) -> Result<()> {
     // check `wasm-opt` is installed
     if which::which("wasm-opt").is_err() {
@@ -349,7 +358,7 @@ fn do_optimization(
 
     let output = Command::new("wasm-opt")
         .arg(dest_wasm)
-        .arg(format!("-O{}", optimization_level))
+        .arg(format!("-O{}", optimization_level.to_str()))
         .arg("-o")
         .arg(dest_optimized)
         // the memory in our module is imported, `wasm-opt` needs to be told that
@@ -381,6 +390,7 @@ fn execute(
     optimize_contract: bool,
     build_artifact: BuildArtifacts,
     unstable_flags: UnstableFlags,
+    optimization_passes: OptimizationPasses,
 ) -> Result<BuildResult> {
     if build_artifact == BuildArtifacts::CodeOnly || build_artifact == BuildArtifacts::CheckOnly {
         let crate_metadata = CrateMetadata::collect(manifest_path)?;
@@ -390,6 +400,7 @@ fn execute(
             optimize_contract,
             build_artifact,
             unstable_flags,
+            optimization_passes,
         )?;
         let res = BuildResult {
             dest_wasm: maybe_dest_wasm,
@@ -403,7 +414,13 @@ fn execute(
         return Ok(res);
     }
 
-    let res = super::metadata::execute(&manifest_path, verbosity, build_artifact, unstable_flags)?;
+    let res = super::metadata::execute(
+        &manifest_path,
+        verbosity,
+        build_artifact,
+        unstable_flags,
+        optimization_passes,
+    )?;
     Ok(res)
 }
 
@@ -422,6 +439,7 @@ pub(crate) fn execute_with_crate_metadata(
     optimize_contract: bool,
     build_artifact: BuildArtifacts,
     unstable_flags: UnstableFlags,
+    optimization_passes: OptimizationPasses,
 ) -> Result<(Option<PathBuf>, Option<OptimizationResult>)> {
     maybe_println!(
         verbosity,
@@ -446,7 +464,7 @@ pub(crate) fn execute_with_crate_metadata(
         format!("[3/{}]", build_artifact.steps()).bold(),
         "Optimizing wasm file".bright_green().bold()
     );
-    let optimization_result = optimize_wasm(&crate_metadata)?;
+    let optimization_result = optimize_wasm(&crate_metadata, optimization_passes)?;
     Ok((
         Some(crate_metadata.dest_wasm.clone()),
         Some(optimization_result),
@@ -464,12 +482,14 @@ mod tests_ci_only {
             cmd::new::execute("new_project", Some(path)).expect("new project creation failed");
             let manifest_path =
                 ManifestPath::new(&path.join("new_project").join("Cargo.toml")).unwrap();
+            let optimization_passes = 3;
             let res = super::execute(
                 &manifest_path,
                 None,
                 true,
                 BuildArtifacts::All,
                 UnstableFlags::default(),
+                optimization_passes,
             )
             .expect("build failed");
 
@@ -495,6 +515,7 @@ mod tests_ci_only {
             cmd::new::execute("new_project", Some(path)).expect("new project creation failed");
             let project_dir = path.join("new_project");
             let manifest_path = ManifestPath::new(&project_dir.join("Cargo.toml")).unwrap();
+            let optimization_passes = 3;
 
             // when
             super::execute(
@@ -503,6 +524,7 @@ mod tests_ci_only {
                 true,
                 BuildArtifacts::CheckOnly,
                 UnstableFlags::default(),
+                optimization_passes,
             )
             .expect("build failed");
 

src/cmd/metadata.rs

@@ -18,7 +18,7 @@ use crate::{
     crate_metadata::CrateMetadata,
     maybe_println, util,
     workspace::{ManifestPath, Workspace},
-    BuildArtifacts, BuildResult, OptimizationResult, UnstableFlags, Verbosity,
+    BuildArtifacts, BuildResult, OptimizationPasses, OptimizationResult, UnstableFlags, Verbosity,
 };
 
 use anyhow::Result;
@@ -40,6 +40,7 @@ struct GenerateMetadataCommand {
     verbosity: Verbosity,
     build_artifact: BuildArtifacts,
     unstable_options: UnstableFlags,
+    optimization_passes: OptimizationPasses,
 }
 
 /// Result of generating the extended contract project metadata
@@ -239,6 +240,7 @@ impl GenerateMetadataCommand {
             true, // for the hash we always use the optimized version of the contract
             self.build_artifact,
             self.unstable_options.clone(),
+            self.optimization_passes,
         )?;
 
         let wasm = fs::read(&self.crate_metadata.dest_wasm)?;
@@ -265,13 +267,15 @@ pub(crate) fn execute(
     verbosity: Verbosity,
     build_artifact: BuildArtifacts,
     unstable_options: UnstableFlags,
+    optimization_passes: OptimizationPasses,
 ) -> Result<BuildResult> {
     let crate_metadata = CrateMetadata::collect(manifest_path)?;
     let res = GenerateMetadataCommand {
         crate_metadata,
         verbosity,
         build_artifact,
         unstable_options,
+        optimization_passes,
     }
     .exec()?;
     Ok(res)

src/main.rs

@@ -93,6 +93,83 @@ impl ExtrinsicOpts {
     }
 }
 
+#[derive(Clone, Debug, StructOpt)]
+pub struct OptimizationFlags {
+    // number of optimization passes
+    #[structopt(long = "optimization-passes", default_value = "3")]
+    optimization_passes: String,
+}
+
+/// Denotes if output should be printed to stdout.
+#[derive(Clone, Copy)]
+pub enum OptimizationPasses {
+    ///
+    Zero,
+    One,
+    Two,
+    Three,
+    Four,
+    S,
+    Z,
+}
+
+impl TryFrom<&OptimizationFlags> for OptimizationPasses {
+    type Error = Error;
+
+    fn try_from(value: &OptimizationFlags) -> Result<Self, Self::Error> {
+        match value.optimization_passes.to_lowercase().as_str() {
+            "0" => Ok(OptimizationPasses::Zero),
+            "1" => Ok(OptimizationPasses::One),
+            "2" => Ok(OptimizationPasses::Two),
+            "3" => Ok(OptimizationPasses::Three),
+            "4" => Ok(OptimizationPasses::Four),
+            "s" => Ok(OptimizationPasses::S),
+            "z" => Ok(OptimizationPasses::Z),
+            _ => anyhow::bail!(
+                "Unknown optimization passes option {}",
+                value.optimization_passes
+            ),
+        }
+    }
+}
+
+impl OptimizationPasses {
+    /// Returns string representation of OptimizationPasses
+    pub(crate) fn to_str(&self) -> &str {
+        match self {
+            OptimizationPasses::Zero => "0",
+            OptimizationPasses::One => "1",
+            OptimizationPasses::Two => "2",
+            OptimizationPasses::Three => "3",
+            OptimizationPasses::Four => "4",
+            OptimizationPasses::S => "s",
+            OptimizationPasses::Z => "z",
+        }
+    }
+
+    /// to_passes returns number of optimization passes to do
+    pub(crate) fn to_passes(&self) -> u32 {
+        match self {
+            OptimizationPasses::Zero => 0,
+            OptimizationPasses::One => 1,
+            OptimizationPasses::Two => 2,
+            OptimizationPasses::Three => 3,
+            OptimizationPasses::Four => 4,
+            _ => 3, // Default to three for shrink settings
+        }
+    }
+
+    /// to_shrink returns amount of shrinkage to do
+    pub(crate) fn to_shrink(&self) -> u32 {
+        match self {
+            OptimizationPasses::Zero => 0,
+            OptimizationPasses::S => 1,
+            OptimizationPasses::Z => 2,
+            _ => 1,
+        }
+    }
+}
+
 #[derive(Clone, Debug, StructOpt)]
 pub struct VerbosityFlags {
     /// No output printed to stdout