Add test for jump optimization

Author: boriel

tests/functional/opt3_gogogoto.asm

@@ -0,0 +1,38 @@
+	org 32768
+__START_PROGRAM:
+	di
+	push ix
+	push iy
+	exx
+	push hl
+	exx
+	ld hl, 0
+	add hl, sp
+	ld (__CALL_BACK__), hl
+	ei
+	jp __LABEL__10
+__END_PROGRAM:
+	di
+	ld hl, (__CALL_BACK__)
+	ld sp, hl
+	exx
+	pop hl
+	pop iy
+	pop ix
+	exx
+	ei
+	ret
+__CALL_BACK__:
+	DEFW 0
+__LABEL__10:
+__LABEL__20:
+	jp __LABEL__10
+__LABEL__30:
+	jp __LABEL__10
+
+ZXBASIC_USER_DATA:
+	; Defines DATA END --> HEAP size is 0
+ZXBASIC_USER_DATA_END EQU ZXBASIC_MEM_HEAP
+	; Defines USER DATA Length in bytes
+ZXBASIC_USER_DATA_LEN EQU ZXBASIC_USER_DATA_END - ZXBASIC_USER_DATA
+	END

tests/functional/opt3_gogogoto.bas

@@ -0,0 +1,10 @@
+
+
+GOTO 10
+END
+10 GOTO 20
+END
+20 GOTO 10
+END
+30 GOTO 20
+