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fix: Remove hack in increment_array_reference_count #4265

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Feb 5, 2024
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17 changes: 1 addition & 16 deletions compiler/noirc_evaluator/src/ssa/function_builder/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -486,25 +486,10 @@ impl FunctionBuilder {
self.increment_array_reference_count(value);
}
}
typ @ Type::Array(..) | typ @ Type::Slice(..) => {
Type::Array(..) | Type::Slice(..) => {
// If there are nested arrays or slices, we wait until ArrayGet
// is issued to increment the count of that array.
self.insert_instruction(Instruction::IncrementRc { value }, None);

// This is a bit odd, but in brillig the inc_rc instruction operates on
// a copy of the array's metadata, so we need to re-store a loaded array
// even if there have been no other changes to it.
if let Value::Instruction { instruction, .. } = &self.current_function.dfg[value] {
let instruction = &self.current_function.dfg[*instruction];
if let Instruction::Load { address } = instruction {
// We can't re-use `value` in case the original address was stored
// to again in the meantime. So introduce another load.
let address = *address;
let value = self.insert_load(address, typ);
self.insert_instruction(Instruction::IncrementRc { value }, None);
self.insert_store(address, value);
}
}
}
}
}
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1 change: 1 addition & 0 deletions compiler/noirc_evaluator/src/ssa/ssa_gen/context.rs
Original file line number Diff line number Diff line change
Expand Up @@ -997,6 +997,7 @@ impl<'a> FunctionContext<'a> {
new_value.for_each(|value| {
let value = value.eval(self);
array = self.builder.insert_array_set(array, index, value);
self.builder.increment_array_reference_count(array);
index = self.builder.insert_binary(index, BinaryOp::Add, one);
});
array
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