Merge pull request RustPython#4278 from evilpie/jit-none

JIT: add internal support for None

Author: youknowone

jit/src/instructions.rs

@@ -25,6 +25,7 @@ enum JitValue {
     Int(Value),
     Float(Value),
     Bool(Value),
+    None,
 }
 
 impl JitValue {
@@ -41,12 +42,14 @@ impl JitValue {
             JitValue::Int(_) => Some(JitType::Int),
             JitValue::Float(_) => Some(JitType::Float),
             JitValue::Bool(_) => Some(JitType::Bool),
+            JitValue::None => None,
         }
     }
 
     fn into_value(self) -> Option<Value> {
         match self {
             JitValue::Int(val) | JitValue::Float(val) | JitValue::Bool(val) => Some(val),
+            JitValue::None => None,
         }
     }
 }
@@ -122,6 +125,7 @@ impl<'a, 'b> FunctionCompiler<'a, 'b> {
                 Ok(self.builder.ins().bint(types::I8, val))
             }
             JitValue::Bool(val) => Ok(val),
+            JitValue::None => Ok(self.builder.ins().iconst(types::I8, 0)),
         }
     }
 
@@ -193,6 +197,10 @@ impl<'a, 'b> FunctionCompiler<'a, 'b> {
                 self.stack.push(JitValue::Bool(val));
                 Ok(())
             }
+            BorrowedConstant::None => {
+                self.stack.push(JitValue::None);
+                Ok(())
+            }
             _ => Err(JitCompileError::NotSupported),
         }
     }

jit/tests/lib.rs

@@ -4,3 +4,4 @@ mod bool_tests;
 mod float_tests;
 mod int_tests;
 mod misc_tests;
+mod none_tests;

jit/tests/none_tests.rs

@@ -0,0 +1,24 @@
+#[test]
+fn test_not() {
+    let not_ = jit_function! { not_(x: i64) -> bool => r##"
+        def not_(x: int):
+            return not None
+    "## };
+
+    assert_eq!(not_(0), Ok(true));
+}
+
+#[test]
+fn test_if_not() {
+    let if_not = jit_function! { if_not(x: i64) -> i64 => r##"
+        def if_not(x: int):
+            if not None:
+                return 1
+            else:
+                return 0
+
+            return -1
+    "## };
+
+    assert_eq!(if_not(0), Ok(1));
+}