Fix casting from the same size of integer

reid-llvm-lib/src/lib.rs

@@ -629,14 +629,17 @@ impl Type {
             }
             (I32 | U32, I16 | U16 | I8 | U8) => Some(Instr::Trunc(value, other.clone())),
             (I16 | U16, I8 | U8) => Some(Instr::Trunc(value, other.clone())),
-            (U8 | I8, U16 | I16 | U32 | I32 | U64 | I64 | U128 | I128) => {
+            (U8 | I8, U8 | I8 | U16 | I16 | U32 | I32 | U64 | I64 | U128 | I128) => {
                 Some(Instr::ZExt(value, other.clone()))
             }
-            (U16 | I16, U32 | I32 | U64 | I64 | U128 | I128) => {
+            (U16 | I16, U16 | I16 | U32 | I32 | U64 | I64 | U128 | I128) => {
                 Some(Instr::ZExt(value, other.clone()))
             }
-            (U32 | I32, U64 | I64 | U128 | I128) => Some(Instr::ZExt(value, other.clone())),
-            (U64 | I64, U128 | I128) => Some(Instr::ZExt(value, other.clone())),
+            (U32 | I32, U32 | I32 | U64 | I64 | U128 | I128) => {
+                Some(Instr::ZExt(value, other.clone()))
+            }
+            (U64 | I64, U64 | I64 | U128 | I128) => Some(Instr::ZExt(value, other.clone())),
+            (U128 | I128, U128 | I128) => Some(Instr::ZExt(value, other.clone())),
             (U8 | U16 | U32 | U64 | U128, F16 | F32 | F32B | F64 | F80 | F128 | F128PPC) => {
                 Some(Instr::UIToFP(value, other.clone()))
             }

reid/src/ast/parse.rs

@@ -224,7 +224,7 @@ impl Parse for PrimaryExpression {
                     stream.expect(Token::BracketClose)?;
                     Expression(Kind::Array(expressions), stream.get_range().unwrap())
                 }
-                _ => Err(stream.expected_err("expression")?)?,
+                _ => Err(stream.expected_err("expression inner")?)?,
             }
         } else {
             Err(stream.expected_err("expression")?)?
@@ -662,14 +662,11 @@ impl Parse for BlockLevelStatement {
                 if let Ok(SetStatement(ident, expr, range)) = stream.parse() {
                     Stmt::Set(ident, expr, range)
                 } else {
-                    if let Ok(e) = stream.parse() {
-                        if stream.expect(Token::Semi).is_ok() {
-                            Stmt::Expression(e)
-                        } else {
-                            Stmt::Return(ReturnType::Soft, e)
-                        }
+                    let e = stream.parse()?;
+                    if stream.expect(Token::Semi).is_ok() {
+                        Stmt::Expression(e)
                     } else {
-                        Err(stream.expecting_err("expression")?)?
+                        Stmt::Return(ReturnType::Soft, e)
                     }
                 }
             }

reid/src/codegen.rs

@@ -1085,7 +1085,8 @@ impl mir::Expression {
                         },
                         (TypeKind::UserPtr(_), TypeKind::UserPtr(_))
                         | (TypeKind::Char, TypeKind::U8)
-                        | (TypeKind::U8, TypeKind::Char) => Some(StackValue(
+                        | (TypeKind::U8, TypeKind::Char)
+                        | (TypeKind::U8, TypeKind::I8) => Some(StackValue(
                             val.0.derive(
                                 scope
                                     .block