refact: remove unused code

Also add type "str" for internal usage.

Author: boriel

src/arch/z80/backend/common.py

@@ -7,7 +7,6 @@
 from src.api import global_, tmp_labels
 from src.api.config import OPTIONS, OptimizationStrategy
 from src.api.exception import TempAlreadyFreedError
-
 from .runtime import LABEL_REQUIRED_MODULES, NAMESPACE, RUNTIME_LABELS
 from .runtime import Labels as RuntimeLabel
 
@@ -34,6 +33,7 @@ class DataType(StrEnum):
     i32 = "i32"
     f16 = "f16"
     f = "f"
+    str = "str"
 
 
 # Handy constants, to not having to type long names :-)
@@ -46,7 +46,7 @@ class DataType(StrEnum):
 I32_t: Final[DataType] = DataType.i32
 F16_t: Final[DataType] = DataType.f16
 F_t: Final[DataType] = DataType.f
-
+STR_t: Final[DataType] = DataType.str
 
 # Internal data types definition, with its size in bytes, or -1 if it is variable (string)
 # Compound types are only arrays, and have the t
@@ -297,32 +297,6 @@ def get_bytes_size(elements: list[str]) -> int:
     return len(get_bytes(elements))
 
 
-def to_bool(stype: DataType) -> list[str]:
-    """Returns the instruction sequence for converting the number given number (in the stack)
-    to boolean (just 0 (False) or non-zero (True))."""
-
-    if stype in (U8_t, I8_t):
-        return []
-
-    if stype in (U16_t, I16_t):
-        return [
-            "ld a, h" "or l",
-        ]
-
-    if stype in (U32_t, I32_t, F16_t):
-        return ["ld a, h" "or l" "or d", "or e,"]
-
-    if stype == F_t:
-        return [
-            "or b",
-            "or c",
-            "or d",
-            "or e",
-        ]
-
-    raise NotImplementedError(f"type conversion from {stype} to bool is undefined")
-
-
 def normalize_boolean() -> list[str]:
     if OPTIONS.opt_strategy == OptimizationStrategy.Size:
         return [runtime_call(RuntimeLabel.NORMALIZE_BOOLEAN)]

src/arch/z80/backend/generic.py

@@ -7,11 +7,10 @@
 from src.api.config import OPTIONS
 from src.api.fp import immediate_float
 from src.api.tmp_labels import tmp_label
-
 from . import common, exception
-from ._8bit import Bits8
 from ._16bit import Bits16
 from ._32bit import Bits32
+from ._8bit import Bits8
 from ._f16 import Fixed16
 from ._float import Float
 from .common import (
@@ -24,7 +23,6 @@
     get_bytes_size,
     new_ASMID,
     runtime_call,
-    to_bool,
     to_byte,
     to_fixed,
     to_float,
@@ -365,8 +363,6 @@ def _cast(ins: Quad):
         output.extend(to_fixed(tA))
     elif tB == "f":
         output.extend(to_float(tA))
-    elif tB == "bool":
-        output.extend(to_bool(tA))
     else:
         raise exception.GenericError("Internal error: invalid typecast from %s to %s" % (tA, tB))
 

src/arch/z80/visitor/translator_inst_visitor.py

@@ -2,7 +2,7 @@
 from src.api.debug import __DEBUG__
 from src.arch.interface.quad import Quad
 from src.arch.z80.backend import Backend
-from src.arch.z80.backend.common import BOOL_t, F16_t, F_t, I8_t, I16_t, I32_t, U8_t, U16_t, U32_t
+from src.arch.z80.backend.common import BOOL_t, F16_t, F_t, I8_t, I16_t, I32_t, U8_t, U16_t, U32_t, STR_t
 from src.ast import NodeVisitor
 from src.symbols import sym as symbols
 
@@ -30,7 +30,7 @@ def TSUFFIX(type_: TYPE | symbols.TYPEREF | symbols.BASICTYPE) -> str:
             TYPE.ulong: U32_t,
             TYPE.fixed: F16_t,
             TYPE.float: F_t,
-            TYPE.string: "str",
+            TYPE.string: STR_t,
             TYPE.boolean: BOOL_t,
         }