# ProbeGen: minimal probe for cross-generation IR instability. Do not treat as a normal feature test.

# Translate the same source with two compiler generations, then diff the emitted IR per module
# (module file name = source SHA1, so both sides are comparable).

#   Gen 1: TransPyV\output\TransPyV.exe --project Test\ProbeGen\project.vpj --clean --run --build-dir Test\ProbeGen\.tpv_build_g1
#   Gen 2: TransPyV\.tpv_build\output\TransPyV.exe --project Test\ProbeGen\project.vpj --clean --run --build-dir Test\ProbeGen\.tpv_build_g2

# WARNING [P6] breaks compilation from generation 2 onward; comment out [P6] to get Gen-2 IR for P1..P5.
import t
from stdint import *
import w32.win32console as w32console


# [P1] Nested union parameter: VOIDPTR (typedef of t.CPtr) unioned with t.CPtr gives i8** on one side, i8* on the other.
# Declared but never called, so no link reference is produced.
extern def ProbeNestedUnion(Context: VOIDPTR*) -> BOOL


# [P2] Struct by-value parameter: COORD without | t.CPtr gives %COORD on one side, %COORD* on the other.
extern def ProbeCoordByVal(dwSize: w32console.COORD) -> BOOL


# [P5] Sink for the local uint8 = 1 literal: store it into a global so the code is not dead-code eliminated.
U8Sink: uint8 = 0


# [P3] char -> int promotion: param char, int return. One side must emit zext i8 to i32, not ret i8.
def ProbeOrd(s: char) -> int:
    return s


# [P4] double comparison: params/return double. One side must emit fcmp olt double, not icmp slt double.
def ProbeMin(a: double, b: double) -> double:
    if a < b:
        return a
    return b


# [P5] Local uint8 = 1 assignment: literal typing must emit store i8 1, not store i32 1 or trunc+store.
def ProbeU8Literal() -> uint8:
    global U8Sink
    result: uint8 = 1
    U8Sink = result
    return result


# [P6] Class field union + subscript write: field is char | t.CPtr, must null-check before indexed write.
# Generations 2+ fail here with "SyntaxError: subscript ptr is None".
class Box:
    p: char*

    def __init__(self):
        self.p = None

    def Clear(self):
        if self.p != None:
            self.p[0] = 0
        pass


# Entry: keep main minimal, referencing each construct above so it is really translated; return 0.
# P1/P2 are extern declarations and are not called, so their difference shows in this module's declares.
@t.CExport
def main() -> int:
    Ch: char = 'A'
    BoxInst: Box = Box()
    BoxInst.Clear()
    ProbeOrd(Ch)
    ProbeMin(1.0, 2.0)
    ProbeU8Literal()
    return 0