gas: Generate code for if statement

If statements are now working, the only exception is for the comparators
|| and && that will be addressed in a further commit. Checks tested:

  fn main(): i32 {
    let n: i32 = 11;

    if (n == 11) {
      if n != 12 {
        if n < 12 {
          if n <= 11 {
            if n > 10 {
              if n >= 11 {
                return 42;
              }
            }
          }
        }
      }
    }

    return n;
  }

To compile the && and || a precedence issue must be addressed: they must
have the highest precedence, witch is not working now:

  1 == 2 || 3 != 2

The or should be the higher level of the tree in the example above.

Signed-off-by: Carlos Maniero <carlos@maniero.me>

1 files changed, 1 insertions, 0 deletions

diff --git a/test/integration_test.c b/test/integration_test.c
index 4178b42..985e574 100644
--- a/test/integration_test.c
+++ b/test/integration_test.c
@@ -43,6 +43,7 @@ test_examples(const MunitParameter params[], void *user_data_or_fixture)
   assert_exit_status("../examples/main.pipa", 69);
   assert_exit_status("../examples/arithmetics.pipa", 13);
   assert_exit_status("../examples/variables.pipa", 28);
+  assert_exit_status("../examples/if.pipa", 42);
 
   return MUNIT_OK;
 }