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WIP.

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This commit is contained in:
Chris Fallin 2022-11-02 18:18:33 -07:00
parent a244d4ab52
commit 3dc1356669
1 changed files with 36 additions and 16 deletions
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44
src/frontend.rs
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@ -247,7 +247,7 @@ impl LocalTracker {
}
if body.blocks[at_block].preds.is_empty() {
let value = self.create_default_value(body, ty);
let value = self.create_default_value(body, ty, at_block);
log::trace!(" -> created default: {:?}", value);
return value;
}
@ -283,13 +283,17 @@ impl LocalTracker {
if let Some(block) = self.cur_block {
self.get_in_block(body, block, local)
} else {
let ty = body.locals[local];
self.create_default_value(body, ty)
Value::invalid()
}
}
fn create_default_value(&mut self, body: &mut FunctionBody, ty: Type) -> Value {
match ty {
fn create_default_value(
&mut self,
body: &mut FunctionBody,
ty: Type,
at_block: Block,
) -> Value {
let val = match ty {
Type::I32 => body.add_value(ValueDef::Operator(
Operator::I32Const { value: 0 },
vec![],
@ -315,7 +319,9 @@ impl LocalTracker {
vec![ty],
)),
_ => todo!("unsupported type: {:?}", ty),
}
};
body.blocks[at_block].insts.push(val);
val
}
fn compute_blockparam(
@ -533,10 +539,13 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
self.op_stack.pop().unwrap().1
}
fn block_results(&mut self, tys: &[Type], start_depth: usize) -> Vec<Value> {
fn block_results(&mut self, tys: &[Type], start_depth: usize, at_block: Block) -> Vec<Value> {
if self.op_stack.len() < start_depth + tys.len() {
tys.iter()
.map(|&ty| self.locals.create_default_value(&mut self.body, ty))
.map(|&ty| {
self.locals
.create_default_value(&mut self.body, ty, at_block)
})
.collect()
} else {
self.pop_n(tys.len())
@ -784,8 +793,11 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
}) => {
// Generate a branch to the out-block with
// blockparams for the results.
let result_values = self.block_results(&results[..], *start_depth);
if let Some(cur_block) = self.cur_block {
let result_values =
self.block_results(&results[..], *start_depth, cur_block);
self.emit_branch(*out, &result_values[..]);
}
self.op_stack.truncate(*start_depth);
// Seal the out-block: no more edges will be
// added to it. Also, if we're ending a loop,
@ -809,8 +821,11 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
}) => {
// Generate a branch to the out-block with
// blockparams for the results.
let result_values = self.block_results(&results[..], *start_depth);
if let Some(cur_block) = self.cur_block {
let result_values =
self.block_results(&results[..], *start_depth, cur_block);
self.emit_branch(*out, &result_values[..]);
}
self.op_stack.truncate(*start_depth);
// No `else`, so we need to generate a trivial
// branch in the else-block. If the if-block-type
@ -838,8 +853,11 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
}) => {
// Generate a branch to the out-block with
// blockparams for the results.
let result_values = self.block_results(&results[..], *start_depth);
if let Some(cur_block) = self.cur_block {
let result_values =
self.block_results(&results[..], *start_depth, cur_block);
self.emit_branch(*out, &result_values[..]);
}
self.op_stack.truncate(*start_depth);
self.cur_block = Some(*out);
self.locals.seal_block_preds(*out, &mut self.body);
@ -917,8 +935,10 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
results,
} = self.ctrl_stack.pop().unwrap()
{
let if_results = self.block_results(&results[..], start_depth);
if let Some(cur_block) = self.cur_block {
let if_results = self.block_results(&results[..], start_depth, cur_block);
self.emit_branch(out, &if_results[..]);
}
self.op_stack.truncate(start_depth);
self.op_stack.extend(param_values);
self.ctrl_stack.push(Frame::Else {