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fix: Count array copies for slice functions #8867

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Merged
jfecher merged 2 commits into from
Jun 11, 2025
Merged

fix: Count array copies for slice functions #8867

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e6d50b1
Count array copies in brillig
jfecher Jun 10, 2025
167d9c9
Merge branch 'master' into jf/slice-count
jfecher Jun 11, 2025
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1 change: 1 addition & 0 deletions compiler/noirc_driver/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -739,6 +739,7 @@ pub fn compile_no_check(
|| options.print_acir
|| options.show_brillig
|| options.force_brillig
|| options.count_array_copies
|| options.show_ssa
|| !options.show_ssa_pass.is_empty()
|| options.emit_ssa
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5 changes: 5 additions & 0 deletions compiler/noirc_evaluator/src/brillig/brillig_ir/codegen_binary.rs
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Expand Up @@ -33,4 +33,9 @@ impl<F: AcirField + DebugToString, Registers: RegisterAllocator> BrilligContext<
self.deallocate_single_addr(const_register);
}
}

pub(crate) fn codegen_increment_array_copy_counter(&mut self) {
let array_copy_counter = self.array_copy_counter_address();
self.codegen_usize_op(array_copy_counter, array_copy_counter, BrilligBinaryOp::Add, 1);
}
}
8 changes: 1 addition & 7 deletions compiler/noirc_evaluator/src/brillig/brillig_ir/procedures/array_copy.rs
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Expand Up @@ -81,13 +81,7 @@

// Increase our array copy counter if that flag is set
if ctx.count_arrays_copied {
let array_copy_counter = BrilligVariable::SingleAddr(SingleAddrVariable {
address: ctx.array_copy_counter_address(),
bit_size: 32,
});

let counter_register = array_copy_counter.extract_register();
ctx.codegen_usize_op(counter_register, counter_register, BrilligBinaryOp::Add, 1);
ctx.codegen_increment_array_copy_counter();
}
}
});
Expand All @@ -97,8 +91,8 @@
const ARRAY_COPY_COUNTER_MESSAGE: &str = "Total arrays copied: {}";

/// The metadata string needed to tell `print` to print out a u32
const PRINT_U32_TYPE_STRING: &str = "{\"kind\":\"unsignedinteger\",\"width\":32}";

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Unknown word (unsignedinteger)
// "{\"kind\":\"array\",\"length\":2,\"type\":{\"kind\":\"unsignedinteger\",\"width\":32}}";

Check warning on line 95 in compiler/noirc_evaluator/src/brillig/brillig_ir/procedures/array_copy.rs

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Unknown word (unsignedinteger)

// Create and return the string `PRINT_U32_TYPE_STRING`
fn literal_string_to_value<F: AcirField + DebugToString, Registers: RegisterAllocator>(
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11 changes: 11 additions & 0 deletions compiler/noirc_evaluator/src/brillig/brillig_ir/procedures/prepare_vector_push.rs
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Expand Up @@ -181,6 +181,11 @@ pub(crate) fn reallocate_vector_for_insertion<
.mov_instruction(target_vector.pointer, source_vector.pointer);
brillig_context.codegen_update_vector_length(target_vector, target_size);
} else {
// Increase our array copy counter if that flag is set
if brillig_context.count_arrays_copied {
brillig_context.codegen_increment_array_copy_counter();
}

brillig_context.codegen_initialize_vector(
target_vector,
target_size,
Expand All @@ -202,6 +207,12 @@ pub(crate) fn reallocate_vector_for_insertion<
target_size,
Some(double_size),
);

// Increase our array copy counter if that flag is set
if brillig_context.count_arrays_copied {
brillig_context.codegen_increment_array_copy_counter();
}

brillig_context.deallocate_single_addr(double_size);
}
},
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