cairo-lang-lowering 2.4.1

//! > Test loop.

//! > test_runner_name
test_generated_function

//! > function
fn foo() -> bool {
    let mut x = 5;
    loop {
        let y = x + 1;
        x = y;
        if y == 10 {
            break true;
        };
    }
}

//! > function_name
foo

//! > module_code

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:

//! > lowering
Main:
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- 5u
  (v2: core::felt252, v1: core::bool) <- test::foo[expr16](v0)
End:
  Return(v1)


Generated lowering for source location:
    loop {
    ^****^

Parameters: v0: core::felt252
blk0 (root):
Statements:
  (v1: core::felt252) <- 1u
  (v2: core::felt252) <- core::Felt252Add::add(v0, v1)
  (v3: core::felt252) <- 10u
  (v4: core::felt252) <- core::Felt252Sub::sub(v2, v3)
End:
  Match(match core::felt252_is_zero(v4) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v7) => blk2,
  })

blk1:
Statements:
  (v5: ()) <- struct_construct()
  (v6: core::bool) <- bool::True(v5)
End:
  Return(v2, v6)

blk2:
Statements:
End:
  Goto(blk3, {})

blk3:
Statements:
  (v9: core::felt252, v8: core::bool) <- test::foo[expr16](v2)
End:
  Return(v9, v8)

//! > ==========================================================================

//! > Test loop with duplicate member path.

//! > test_runner_name
test_generated_function

//! > function
fn foo() -> bool {
    let mut x = 5;
    loop {
        x = x + 1;
        if x == 10 {
            break true;
        };
    }
}

//! > function_name
foo

//! > module_code

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:

//! > lowering
Main:
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- 5u
  (v2: core::felt252, v1: core::bool) <- test::foo[expr15](v0)
End:
  Return(v1)


Generated lowering for source location:
    loop {
    ^****^

Parameters: v0: core::felt252
blk0 (root):
Statements:
  (v1: core::felt252) <- 1u
  (v2: core::felt252) <- core::Felt252Add::add(v0, v1)
  (v3: core::felt252) <- 10u
  (v4: core::felt252) <- core::Felt252Sub::sub(v2, v3)
End:
  Match(match core::felt252_is_zero(v4) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v7) => blk2,
  })

blk1:
Statements:
  (v5: ()) <- struct_construct()
  (v6: core::bool) <- bool::True(v5)
End:
  Return(v2, v6)

blk2:
Statements:
End:
  Goto(blk3, {})

blk3:
Statements:
  (v9: core::felt252, v8: core::bool) <- test::foo[expr15](v2)
End:
  Return(v9, v8)

//! > ==========================================================================

//! > Test loop with member path borrowing.

//! > test_runner_name
test_generated_function

//! > function
fn foo(mut a: A, ref b: A) {
  let c = 5_usize;
  loop {
    let mut h = 0;
    a.b.c = c;
    if true {
        h = 1;
        let mut x = 4;
        x = 5;
        b = A { b: a.b, x };
        break b;
    };
  };
}

//! > function_name
foo

//! > module_code
#[derive(Copy,Drop)]
struct A {
  b: B,
  x: felt252,
}
#[derive(Copy,Drop)]
struct B {
  c: usize,
  y: u128,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:

//! > lowering
Main:
Parameters: v0: test::A, v1: test::A
blk0 (root):
Statements:
  (v2: core::integer::u32) <- 5u
  (v3: test::B, v4: core::felt252) <- struct_destructure(v0)
  (v6: core::integer::u32, v7: test::A, v5: test::A) <- test::foo[expr25](v2, v3, v1)
  (v8: core::integer::u32, v9: core::integer::u128) <- struct_destructure(v3)
  (v10: ()) <- struct_construct()
End:
  Return(v7, v10)


Generated lowering for source location:
  loop {
  ^****^

Parameters: v0: core::integer::u32, v1: test::B, v2: test::A
blk0 (root):
Statements:
  (v3: core::felt252) <- 0u
  (v4: core::integer::u32, v5: core::integer::u128) <- struct_destructure(v1)
  (v6: ()) <- struct_construct()
  (v7: core::bool) <- bool::True(v6)
End:
  Match(match_enum(v7) {
    bool::False(v16) => blk2,
    bool::True(v8) => blk1,
  })

blk1:
Statements:
  (v9: core::felt252) <- 1u
  (v10: core::felt252) <- 4u
  (v11: core::felt252) <- 5u
  (v12: test::B) <- struct_construct(v0, v5)
  (v13: test::A) <- struct_construct(v12, v11)
  (v14: core::integer::u32, v15: core::integer::u128) <- struct_destructure(v12)
End:
  Return(v14, v13, v13)

blk2:
Statements:
End:
  Goto(blk3, {})

blk3:
Statements:
  (v17: test::B) <- struct_construct(v0, v5)
  (v19: core::integer::u32, v20: test::A, v18: test::A) <- test::foo[expr25](v0, v17, v2)
  (v21: core::integer::u32, v22: core::integer::u128) <- struct_destructure(v17)
End:
  Return(v19, v20, v18)

//! > ==========================================================================

//! > Test loop with continue.

//! > test_runner_name
test_generated_function

//! > function
fn foo() -> bool {
    let mut x = 5;
    loop {
        let y = x + 1;
        x = y;
        if y == 7 {
            continue;
        }
        if y == 10 {
            break true;
        };
    }
}

//! > function_name
foo

//! > module_code

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:

//! > lowering
Main:
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- 5u
  (v2: core::felt252, v1: core::bool) <- test::foo[expr23](v0)
End:
  Return(v1)


Generated lowering for source location:
    loop {
    ^****^

Parameters: v0: core::felt252
blk0 (root):
Statements:
  (v1: core::felt252) <- 1u
  (v2: core::felt252) <- core::Felt252Add::add(v0, v1)
  (v3: core::felt252) <- 7u
  (v4: core::felt252) <- core::Felt252Sub::sub(v2, v3)
End:
  Match(match core::felt252_is_zero(v4) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v7) => blk2,
  })

blk1:
Statements:
  (v6: core::felt252, v5: core::bool) <- test::foo[expr23](v2)
End:
  Return(v6, v5)

blk2:
Statements:
End:
  Goto(blk3, {})

blk3:
Statements:
  (v8: core::felt252) <- 10u
  (v9: core::felt252) <- core::Felt252Sub::sub(v2, v8)
End:
  Match(match core::felt252_is_zero(v9) {
    IsZeroResult::Zero => blk4,
    IsZeroResult::NonZero(v12) => blk5,
  })

blk4:
Statements:
  (v10: ()) <- struct_construct()
  (v11: core::bool) <- bool::True(v10)
End:
  Return(v2, v11)

blk5:
Statements:
End:
  Goto(blk6, {})

blk6:
Statements:
  (v14: core::felt252, v13: core::bool) <- test::foo[expr23](v2)
End:
  Return(v14, v13)

//! > ==========================================================================

//! > Test loop with break;

//! > test_runner_name
test_generated_function

//! > function
fn foo() {
  loop {
      break;
  }
}

//! > function_name
foo

//! > module_code

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:

//! > lowering
Main:
Parameters:
blk0 (root):
Statements:
  (v0: ()) <- test::foo[expr0]()
End:
  Return(v0)


Generated lowering for source location:
  loop {
  ^****^

Parameters:
blk0 (root):
Statements:
  (v0: ()) <- struct_construct()
End:
  Return(v0)

//! > ==========================================================================

//! > Change in block merge in loop.

//! > test_runner_name
test_generated_function

//! > function
fn foo() {
  let mut x = A { a: 3, b: 4 };
  loop {
      if (true) {
        x.a = 0;
      } else {
        x.a = 0;
      }

      if x.a == 0 {
          break;
      };
  };
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop, Debug)]
struct A {
  a: u8,
  b: u8,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:

//! > lowering
Main:
Parameters:
blk0 (root):
Statements:
  (v0: core::integer::u8) <- 3u
  (v1: core::integer::u8) <- 4u
  (v2: test::A) <- struct_construct(v0, v1)
  (v3: core::integer::u8, v4: core::integer::u8) <- struct_destructure(v2)
  (v6: core::integer::u8, v5: ()) <- test::foo[expr24](v3)
  (v7: ()) <- struct_construct()
End:
  Return(v7)


Generated lowering for source location:
  loop {
  ^****^

Parameters: v0: core::integer::u8
blk0 (root):
Statements:
  (v1: ()) <- struct_construct()
  (v2: core::bool) <- bool::True(v1)
End:
  Match(match_enum(v2) {
    bool::False(v5) => blk2,
    bool::True(v3) => blk1,
  })

blk1:
Statements:
  (v4: core::integer::u8) <- 0u
End:
  Goto(blk3, {v4 -> v7})

blk2:
Statements:
  (v6: core::integer::u8) <- 0u
End:
  Goto(blk3, {v6 -> v7})

blk3:
Statements:
  (v8: core::integer::u8, v9: @core::integer::u8) <- snapshot(v7)
  (v10: core::integer::u8) <- 0u
  (v11: core::integer::u8, v12: @core::integer::u8) <- snapshot(v10)
  (v13: core::bool) <- core::integer::U8PartialEq::eq(v9, v12)
End:
  Match(match_enum(v13) {
    bool::False(v16) => blk5,
    bool::True(v14) => blk4,
  })

blk4:
Statements:
  (v15: ()) <- struct_construct()
End:
  Return(v8, v15)

blk5:
Statements:
End:
  Goto(blk6, {})

blk6:
Statements:
  (v18: core::integer::u8, v17: ()) <- test::foo[expr24](v8)
End:
  Return(v18, v17)