chore: Use --show-output flag on execution rather than compilation

crates/nargo/src/ops/execute.rs

@@ -10,6 +10,7 @@ pub fn execute_circuit<B: BlackBoxFunctionSolver + Default>(
     _backend: &B,
     circuit: Circuit,
     initial_witness: WitnessMap,
+    show_output: bool,
 ) -> Result<WitnessMap, NargoError> {
     let mut acvm = ACVM::new(B::default(), circuit.opcodes, initial_witness);
 
@@ -23,7 +24,7 @@ pub fn execute_circuit<B: BlackBoxFunctionSolver + Default>(
             }
             ACVMStatus::Failure(error) => return Err(error.into()),
             ACVMStatus::RequiresForeignCall(foreign_call) => {
-                let foreign_call_result = ForeignCall::execute(&foreign_call)?;
+                let foreign_call_result = ForeignCall::execute(&foreign_call, show_output)?;
                 acvm.resolve_pending_foreign_call(foreign_call_result);
             }
         }

crates/nargo/src/ops/foreign_calls.rs

@@ -42,11 +42,14 @@ impl ForeignCall {
 
     pub(crate) fn execute(
         foreign_call: &ForeignCallWaitInfo,
+        show_output: bool,
     ) -> Result<ForeignCallResult, ForeignCallError> {
         let foreign_call_name = foreign_call.function.as_str();
         match Self::lookup(foreign_call_name) {
             Some(ForeignCall::Println) => {
-                Self::execute_println(&foreign_call.inputs)?;
+                if show_output {
+                    Self::execute_println(&foreign_call.inputs)?;
+                }
                 Ok(ForeignCallResult { values: vec![] })
             }
             Some(ForeignCall::Sequence) => {

crates/nargo_cli/src/cli/execute_cmd.rs

@@ -123,7 +123,7 @@ pub(crate) fn execute_program<B: Backend>(
     debug_data: Option<(DebugInfo, Context)>,
 ) -> Result<WitnessMap, CliError<B>> {
     let initial_witness = abi.encode(inputs_map, None)?;
-    let solved_witness_err = nargo::ops::execute_circuit(backend, circuit, initial_witness);
+    let solved_witness_err = nargo::ops::execute_circuit(backend, circuit, initial_witness, true);
     match solved_witness_err {
         Ok(solved_witness) => Ok(solved_witness),
         Err(err) => {

crates/nargo_cli/src/cli/test_cmd.rs

@@ -96,14 +96,17 @@ fn run_test<B: Backend>(
     show_output: bool,
     config: &CompileOptions,
 ) -> Result<(), CliError<B>> {
-    let mut program = compile_no_check(context, show_output, config, main)
-        .map_err(|_| CliError::Generic(format!("Test '{test_name}' failed to compile")))?;
+    let mut program = compile_no_check(context, config, main).map_err(|err| {
+        noirc_errors::reporter::report_all(&context.file_manager, &[err], config.deny_warnings);
+        CliError::Generic(format!("Test '{test_name}' failed to compile"))
+    })?;
+
     // Note: We could perform this test using the unoptimized ACIR as generated by `compile_no_check`.
     program.circuit = optimize_circuit(backend, program.circuit).unwrap().0;
 
     // Run the backend to ensure the PWG evaluates functions like std::hash::pedersen,
     // otherwise constraints involving these expressions will not error.
-    match execute_circuit(backend, program.circuit, WitnessMap::new()) {
+    match execute_circuit(backend, program.circuit, WitnessMap::new(), show_output) {
         Ok(_) => Ok(()),
         Err(error) => {
             let writer = StandardStream::stderr(ColorChoice::Always);

crates/nargo_cli/tests/test_data/strings/src/main.nr

@@ -39,16 +39,30 @@ fn test_prints_strings() {
 fn test_prints_array() {
     let array = [1, 2, 3, 5, 8];
 
-    // TODO: Printing structs currently not supported
-    // let s = Test { a: 1, b: 2, c: [3, 4] };
-    // std::println(s);
+    let s = Test { a: 1, b: 2, c: [3, 4] };
+    std::println(s);
 
     std::println(array);
 
     let hash = std::hash::pedersen(array);
     std::println(hash);
 }
 
+fn failed_constraint(hex_as_field: Field) {
+    // Note that when this method is called from a test method
+    // a `Failed constraint` compile error will be caught before this `println`
+    // is executed as the input will be a constant.
+    // In order to debug failing constraints with `println` calls `nargo execute`
+    // should be used instead
+    std::println(hex_as_field);
+    assert(hex_as_field != 0x41);
+}
+
+#[test]
+fn test_failed_constraint() {
+    failed_constraint(0x41);
+}
+
 struct Test {
     a: Field,
     b: Field,

crates/noirc_driver/src/lib.rs

@@ -192,7 +192,7 @@ pub fn compile_main(
         }
     };
 
-    let compiled_program = compile_no_check(context, true, options, main)?;
+    let compiled_program = compile_no_check(context, options, main)?;
 
     if options.print_acir {
         println!("Compiled ACIR for main (unoptimized):");
@@ -259,7 +259,7 @@ fn compile_contract(
     let mut errs = Vec::new();
     for function_id in &contract.functions {
         let name = context.function_name(function_id).to_owned();
-        let function = match compile_no_check(context, true, options, *function_id) {
+        let function = match compile_no_check(context, options, *function_id) {
             Ok(function) => function,
             Err(err) => {
                 errs.push(err);
@@ -296,14 +296,12 @@ fn compile_contract(
 #[allow(deprecated)]
 pub fn compile_no_check(
     context: &Context,
-    show_output: bool,
     options: &CompileOptions,
     main_function: FuncId,
 ) -> Result<CompiledProgram, FileDiagnostic> {
     let program = monomorphize(main_function, &context.def_interner);
 
-    let (circuit, debug, abi) =
-        create_circuit(program, options.show_ssa, options.show_brillig, show_output)?;
+    let (circuit, debug, abi) = create_circuit(program, options.show_ssa, options.show_brillig)?;
 
     Ok(CompiledProgram { circuit, debug, abi })
 }

crates/noirc_evaluator/src/ssa_refactor.rs

@@ -35,7 +35,6 @@ pub mod ssa_gen;
 /// convert the final SSA into ACIR and return it.
 pub(crate) fn optimize_into_acir(
     program: Program,
-    allow_log_ops: bool,
     print_ssa_passes: bool,
     print_brillig_trace: bool,
 ) -> Result<GeneratedAcir, RuntimeError> {
@@ -63,7 +62,7 @@ pub(crate) fn optimize_into_acir(
             .dead_instruction_elimination()
             .print(print_ssa_passes, "After Dead Instruction Elimination:");
     }
-    ssa.into_acir(brillig, abi_distinctness, allow_log_ops)
+    ssa.into_acir(brillig, abi_distinctness)
 }
 
 /// Compiles the Program into ACIR and applies optimizations to the arithmetic gates
@@ -74,7 +73,6 @@ pub fn create_circuit(
     program: Program,
     enable_ssa_logging: bool,
     enable_brillig_logging: bool,
-    show_output: bool,
 ) -> Result<(Circuit, DebugInfo, Abi), RuntimeError> {
     let func_sig = program.main_function_signature.clone();
     let GeneratedAcir {
@@ -84,7 +82,7 @@ pub fn create_circuit(
         locations,
         input_witnesses,
         ..
-    } = optimize_into_acir(program, show_output, enable_ssa_logging, enable_brillig_logging)?;
+    } = optimize_into_acir(program, enable_ssa_logging, enable_brillig_logging)?;
 
     let abi = gen_abi(func_sig, &input_witnesses, return_witnesses.clone());
     let public_abi = abi.clone().public_abi();

crates/noirc_evaluator/src/ssa_refactor/acir_gen/acir_ir/acir_variable.rs

@@ -827,19 +827,6 @@ impl AcirContext {
         self.radix_decompose(endian, input_var, two_var, limb_count_var, result_element_type)
     }
 
-    /// Prints the given `AcirVar`s as witnesses.
-    pub(crate) fn print(&mut self, input: Vec<AcirValue>) -> Result<(), RuntimeError> {
-        let input = Self::flatten_values(input);
-
-        let witnesses = vecmap(input, |acir_var| {
-            let var_data = &self.vars[&acir_var];
-            let expr = var_data.to_expression();
-            self.acir_ir.get_or_create_witness(&expr)
-        });
-        self.acir_ir.call_print(witnesses);
-        Ok(())
-    }
-
     /// Flatten the given Vector of AcirValues into a single vector of only variables.
     /// Each AcirValue::Array in the vector is recursively flattened, so each element
     /// will flattened into the resulting Vec. E.g. flatten_values([1, [2, 3]) == [1, 2, 3].

crates/noirc_evaluator/src/ssa_refactor/acir_gen/mod.rs

@@ -103,10 +103,9 @@ impl Ssa {
         self,
         brillig: Brillig,
         abi_distinctness: AbiDistinctness,
-        allow_log_ops: bool,
     ) -> Result<GeneratedAcir, RuntimeError> {
         let context = Context::new();
-        let mut generated_acir = context.convert_ssa(self, brillig, allow_log_ops)?;
+        let mut generated_acir = context.convert_ssa(self, brillig)?;
 
         match abi_distinctness {
             AbiDistinctness::Distinct => {
@@ -144,15 +143,10 @@ impl Context {
     }
 
     /// Converts SSA into ACIR
-    fn convert_ssa(
-        self,
-        ssa: Ssa,
-        brillig: Brillig,
-        allow_log_ops: bool,
-    ) -> Result<GeneratedAcir, RuntimeError> {
+    fn convert_ssa(self, ssa: Ssa, brillig: Brillig) -> Result<GeneratedAcir, RuntimeError> {
         let main_func = ssa.main();
         match main_func.runtime() {
-            RuntimeType::Acir => self.convert_acir_main(main_func, &ssa, brillig, allow_log_ops),
+            RuntimeType::Acir => self.convert_acir_main(main_func, &ssa, brillig),
             RuntimeType::Brillig => self.convert_brillig_main(main_func, brillig),
         }
     }
@@ -162,14 +156,13 @@ impl Context {
         main_func: &Function,
         ssa: &Ssa,
         brillig: Brillig,
-        allow_log_ops: bool,
     ) -> Result<GeneratedAcir, RuntimeError> {
         let dfg = &main_func.dfg;
         let entry_block = &dfg[main_func.entry_block()];
         let input_witness = self.convert_ssa_block_params(entry_block.parameters(), dfg)?;
 
         for instruction_id in entry_block.instructions() {
-            self.convert_ssa_instruction(*instruction_id, dfg, ssa, &brillig, allow_log_ops)?;
+            self.convert_ssa_instruction(*instruction_id, dfg, ssa, &brillig)?;
         }
 
         self.convert_ssa_return(entry_block.unwrap_terminator(), dfg)?;
@@ -294,7 +287,6 @@ impl Context {
         dfg: &DataFlowGraph,
         ssa: &Ssa,
         brillig: &Brillig,
-        allow_log_ops: bool,
     ) -> Result<(), RuntimeError> {
         let instruction = &dfg[instruction_id];
         self.acir_context.set_location(dfg.get_location(&instruction_id));
@@ -339,13 +331,8 @@ impl Context {
                         }
                     }
                     Value::Intrinsic(intrinsic) => {
-                        let outputs = self.convert_ssa_intrinsic_call(
-                            *intrinsic,
-                            arguments,
-                            dfg,
-                            allow_log_ops,
-                            result_ids,
-                        )?;
+                        let outputs = self
+                            .convert_ssa_intrinsic_call(*intrinsic, arguments, dfg, result_ids)?;
 
                         // Issue #1438 causes this check to fail with intrinsics that return 0
                         // results but the ssa form instead creates 1 unit result value.
@@ -936,7 +923,6 @@ impl Context {
         intrinsic: Intrinsic,
         arguments: &[ValueId],
         dfg: &DataFlowGraph,
-        allow_log_ops: bool,
         result_ids: &[ValueId],
     ) -> Result<Vec<AcirValue>, RuntimeError> {
         match intrinsic {
@@ -966,13 +952,8 @@ impl Context {
 
                 self.acir_context.bit_decompose(endian, field, bit_size, result_type)
             }
-            Intrinsic::Println => {
-                let inputs = vecmap(arguments, |arg| self.convert_value(*arg, dfg));
-                if allow_log_ops {
-                    self.acir_context.print(inputs)?;
-                }
-                Ok(Vec::new())
-            }
+            // TODO(#2115): Remove the println intrinsic as the oracle println is now used instead
+            Intrinsic::Println => Ok(Vec::new()),
             Intrinsic::Sort => {
                 let inputs = vecmap(arguments, |arg| self.convert_value(*arg, dfg));
                 // We flatten the inputs and retrieve the bit_size of the elements
@@ -1002,7 +983,7 @@ impl Context {
             }
             Intrinsic::ArrayLen => {
                 let len = match self.convert_value(arguments[0], dfg) {
-                    AcirValue::Var(_, _) =>  unreachable!("Non-array passed to array.len() method"),
+                    AcirValue::Var(_, _) => unreachable!("Non-array passed to array.len() method"),
                     AcirValue::Array(values) => (values.len() as u128).into(),
                     AcirValue::DynamicArray(array) => (array.len as u128).into(),
                 };
@@ -1140,7 +1121,7 @@ mod tests {
         let ssa = builder.finish();
 
         let context = Context::new();
-        let acir = context.convert_ssa(ssa, Brillig::default(), false).unwrap();
+        let acir = context.convert_ssa(ssa, Brillig::default()).unwrap();
 
         let expected_opcodes =
             vec![Opcode::Arithmetic(&Expression::one() - &Expression::from(Witness(1)))];

crates/wasm/src/compile.rs

@@ -107,8 +107,8 @@ pub fn compile(args: JsValue) -> JsValue {
         <JsValue as JsValueSerdeExt>::from_serde(&optimized_contracts).unwrap()
     } else {
         let main = context.get_main_function(&crate_id).expect("Could not find main function!");
-        let mut compiled_program = compile_no_check(&context, true, &options.compile_options, main)
-            .expect("Compilation failed");
+        let mut compiled_program =
+            compile_no_check(&context, &options.compile_options, main).expect("Compilation failed");
 
         compiled_program.circuit = optimize_circuit(compiled_program.circuit);