Implement Phase 9.7: ExternCall instruction and WASM runtime imports

Co-authored-by: moe-charm <217100418+moe-charm@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
2025-08-14 08:56:39 +00:00
parent 9b25330d94
commit 2091462441
9 changed files with 318 additions and 3 deletions

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@ -855,7 +855,7 @@ impl MirBuilder {
/// Build method call: object.method(arguments)
fn build_method_call(&mut self, object: ASTNode, method: String, arguments: Vec<ASTNode>) -> Result<ValueId, String> {
// Build the object expression
let object_value = self.build_expression(object)?;
let object_value = self.build_expression(object.clone())?;
// Build argument expressions
let mut arg_values = Vec::new();
@ -866,7 +866,70 @@ impl MirBuilder {
// Create result value
let result_id = self.value_gen.next();
// Emit a BoxCall instruction
// Check if this is an external call (console.log, canvas.fillRect, etc.)
if let ASTNode::Variable { name: object_name, .. } = object {
match (object_name.as_str(), method.as_str()) {
("console", "log") => {
// Generate ExternCall for console.log
self.emit_instruction(MirInstruction::ExternCall {
dst: None, // console.log is void
iface_name: "env.console".to_string(),
method_name: "log".to_string(),
args: arg_values,
effects: EffectMask::IO, // Console output is I/O
})?;
// Return void value
let void_id = self.value_gen.next();
self.emit_instruction(MirInstruction::Const {
dst: void_id,
value: ConstValue::Void,
})?;
return Ok(void_id);
},
("canvas", "fillRect") => {
// Generate ExternCall for canvas.fillRect
self.emit_instruction(MirInstruction::ExternCall {
dst: None, // canvas.fillRect is void
iface_name: "env.canvas".to_string(),
method_name: "fillRect".to_string(),
args: arg_values,
effects: EffectMask::IO, // Canvas operations are I/O
})?;
// Return void value
let void_id = self.value_gen.next();
self.emit_instruction(MirInstruction::Const {
dst: void_id,
value: ConstValue::Void,
})?;
return Ok(void_id);
},
("canvas", "fillText") => {
// Generate ExternCall for canvas.fillText
self.emit_instruction(MirInstruction::ExternCall {
dst: None, // canvas.fillText is void
iface_name: "env.canvas".to_string(),
method_name: "fillText".to_string(),
args: arg_values,
effects: EffectMask::IO, // Canvas operations are I/O
})?;
// Return void value
let void_id = self.value_gen.next();
self.emit_instruction(MirInstruction::Const {
dst: void_id,
value: ConstValue::Void,
})?;
return Ok(void_id);
},
_ => {
// Regular method call - continue with BoxCall
}
}
}
// Emit a BoxCall instruction for regular method calls
self.emit_instruction(MirInstruction::BoxCall {
dst: Some(result_id),
box_val: object_value,

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@ -273,6 +273,18 @@ pub enum MirInstruction {
dst: ValueId,
future: ValueId,
},
// === Phase 9.7: External Function Calls (Box FFI/ABI) ===
/// External function call through Box FFI/ABI
/// `%dst = extern_call interface.method(%args...)`
ExternCall {
dst: Option<ValueId>,
iface_name: String, // e.g., "env.console"
method_name: String, // e.g., "log"
args: Vec<ValueId>,
effects: EffectMask,
},
}
/// Constant values in MIR
@ -389,6 +401,9 @@ impl MirInstruction {
MirInstruction::FutureNew { .. } => EffectMask::PURE.add(Effect::Alloc), // Creating future may allocate
MirInstruction::FutureSet { .. } => EffectMask::WRITE, // Setting future has write effects
MirInstruction::Await { .. } => EffectMask::READ.add(Effect::Async), // Await blocks and reads
// Phase 9.7: External Function Calls
MirInstruction::ExternCall { effects, .. } => *effects, // Use provided effect mask
}
}
@ -414,7 +429,8 @@ impl MirInstruction {
MirInstruction::Await { dst, .. } => Some(*dst),
MirInstruction::Call { dst, .. } |
MirInstruction::BoxCall { dst, .. } => *dst,
MirInstruction::BoxCall { dst, .. } |
MirInstruction::ExternCall { dst, .. } => *dst,
MirInstruction::Store { .. } |
MirInstruction::Branch { .. } |
@ -500,6 +516,9 @@ impl MirInstruction {
MirInstruction::FutureNew { value, .. } => vec![*value],
MirInstruction::FutureSet { future, value } => vec![*future, *value],
MirInstruction::Await { future, .. } => vec![*future],
// Phase 9.7: External Function Calls
MirInstruction::ExternCall { args, .. } => args.clone(),
}
}
}
@ -572,6 +591,17 @@ impl fmt::Display for MirInstruction {
write!(f, "ret void")
}
},
MirInstruction::ExternCall { dst, iface_name, method_name, args, effects } => {
if let Some(dst) = dst {
write!(f, "{} = extern_call {}.{}({}); effects: {}", dst, iface_name, method_name,
args.iter().map(|v| format!("{}", v)).collect::<Vec<_>>().join(", "),
effects)
} else {
write!(f, "extern_call {}.{}({}); effects: {}", iface_name, method_name,
args.iter().map(|v| format!("{}", v)).collect::<Vec<_>>().join(", "),
effects)
}
},
_ => write!(f, "{:?}", self), // Fallback for other instructions
}
}
@ -730,4 +760,34 @@ mod tests {
assert!(write_barrier.effects().contains(super::super::effect::Effect::Barrier));
assert!(write_barrier.effects().contains(super::super::effect::Effect::WriteHeap));
}
#[test]
fn test_extern_call_instruction() {
let dst = ValueId::new(0);
let arg1 = ValueId::new(1);
let arg2 = ValueId::new(2);
let inst = MirInstruction::ExternCall {
dst: Some(dst),
iface_name: "env.console".to_string(),
method_name: "log".to_string(),
args: vec![arg1, arg2],
effects: super::super::effect::EffectMask::IO,
};
assert_eq!(inst.dst_value(), Some(dst));
assert_eq!(inst.used_values(), vec![arg1, arg2]);
assert_eq!(inst.effects(), super::super::effect::EffectMask::IO);
// Test void extern call
let void_inst = MirInstruction::ExternCall {
dst: None,
iface_name: "env.canvas".to_string(),
method_name: "fillRect".to_string(),
args: vec![arg1],
effects: super::super::effect::EffectMask::IO,
};
assert_eq!(void_inst.dst_value(), None);
assert_eq!(void_inst.used_values(), vec![arg1]);
}
}

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@ -360,6 +360,16 @@ impl MirPrinter {
MirInstruction::Await { dst, future } => {
format!("{} = await {}", dst, future)
},
// Phase 9.7: External Function Calls
MirInstruction::ExternCall { dst, iface_name, method_name, args, effects } => {
let args_str = args.iter().map(|v| format!("{}", v)).collect::<Vec<_>>().join(", ");
if let Some(dst) = dst {
format!("{} = extern_call {}.{}({}) [effects: {}]", dst, iface_name, method_name, args_str, effects)
} else {
format!("extern_call {}.{}({}) [effects: {}]", iface_name, method_name, args_str, effects)
}
},
}
}