Misc. improvements

• Emit non-zero array constants properly
• Emit only actually used array constants per runtime wrapper
• Juno CLI
• Use repr(C) structs for product types
• Minimal implementation of SROA
• TODO: inlining, codegen cast, intrinsics, dynamic constant math

hercules_ir/src/manifest.rs

@@ -38,7 +38,8 @@ pub struct ModuleManifest {
  * embed_constant calculates the byte representation of a constant. For zero
  * constants, we avoid storing the actual zero bytes, and optionally store the
  * size - zero constant arrays may have dynamic constant dimensions unknown at
- * compile time.
+ * compile time. The second usize in each variant is the alignment the bytes
+ * must be at to be used properly.
  */
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub enum ConstantBytes {