Fixing struct type size struct Person to 5
Fixing struct type size struct Person to 5
Fixing struct type size struct Person to 5
Fixing struct type SIZE_OF struct Person to 5
Fixing struct type SIZE_OF struct Person to 5
Fixing pointer increment (struct Person*) main::person ← ++ (struct Person*) main::person
Replacing struct member reference *((struct Person*) print_person::person).id with member unwinding reference *((byte*~) print_person::$1)
Replacing struct member reference *((struct Person*) print_person::person).initials with member unwinding reference (byte*~) print_person::$2
Replacing struct member reference *((struct Person*) print_person::person).initials with member unwinding reference (byte*~) print_person::$3
Replacing struct member reference *((struct Person*) print_person::person).initials with member unwinding reference (byte*~) print_person::$4

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  to:@1

(void()) main()
main: scope:[main]  from @2
  (byte) idx#18 ← phi( @2/(byte) idx#19 )
  (struct Person*) main::person#0 ← (const struct Person*) persons
  (struct Person*) print_person::person#0 ← (struct Person*) main::person#0
  call print_person 
  to:main::@1
main::@1: scope:[main]  from main
  (struct Person*) main::person#2 ← phi( main/(struct Person*) main::person#0 )
  (byte) idx#12 ← phi( main/(byte) idx#10 )
  (byte) idx#0 ← (byte) idx#12
  (struct Person*) main::person#1 ← (struct Person*) main::person#2 + (const byte) SIZEOF_STRUCT_PERSON
  (struct Person*) print_person::person#1 ← (struct Person*) main::person#1
  call print_person 
  to:main::@2
main::@2: scope:[main]  from main::@1
  (byte) idx#13 ← phi( main::@1/(byte) idx#10 )
  (byte) idx#1 ← (byte) idx#13
  to:main::@return
main::@return: scope:[main]  from main::@2
  (byte) idx#14 ← phi( main::@2/(byte) idx#1 )
  (byte) idx#2 ← (byte) idx#14
  return 
  to:@return
@1: scope:[]  from @begin
  (byte) idx#3 ← (byte) 0
  to:@2

(void()) print_person((struct Person*) print_person::person)
print_person: scope:[print_person]  from main main::@1
  (byte) idx#15 ← phi( main/(byte) idx#18 main::@1/(byte) idx#0 )
  (struct Person*) print_person::person#2 ← phi( main/(struct Person*) print_person::person#0 main::@1/(struct Person*) print_person::person#1 )
  (byte*~) print_person::$1 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_ID
  (byte~) print_person::$0 ← (byte) '0' + *((byte*~) print_person::$1)
  *((const byte*) SCREEN + (byte) idx#15) ← (byte~) print_person::$0
  (byte) idx#4 ← ++ (byte) idx#15
  *((const byte*) SCREEN + (byte) idx#4) ← (byte) ' '
  (byte) idx#5 ← ++ (byte) idx#4
  (byte*~) print_person::$2 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS
  *((const byte*) SCREEN + (byte) idx#5) ← *((byte*~) print_person::$2 + (number) 0)
  (byte) idx#6 ← ++ (byte) idx#5
  (byte*~) print_person::$3 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS
  *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (number) 1)
  (byte) idx#7 ← ++ (byte) idx#6
  (byte*~) print_person::$4 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS
  *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (number) 2)
  (byte) idx#8 ← ++ (byte) idx#7
  *((const byte*) SCREEN + (byte) idx#8) ← (byte) ' '
  (byte) idx#9 ← ++ (byte) idx#8
  to:print_person::@return
print_person::@return: scope:[print_person]  from print_person
  (byte) idx#16 ← phi( print_person/(byte) idx#9 )
  (byte) idx#10 ← (byte) idx#16
  return 
  to:@return
@2: scope:[]  from @1
  (byte) idx#19 ← phi( @1/(byte) idx#3 )
  call main 
  to:@3
@3: scope:[]  from @2
  (byte) idx#17 ← phi( @2/(byte) idx#2 )
  (byte) idx#11 ← (byte) idx#17
  to:@end
@end: scope:[]  from @3

SYMBOL TABLE SSA
(label) @1
(label) @2
(label) @3
(label) @begin
(label) @end
(const byte) OFFSET_STRUCT_PERSON_ID = (byte) 0
(const byte) OFFSET_STRUCT_PERSON_INITIALS = (byte) 1
(byte) Person::id
(const byte*) Person::initials[(number) 4]  = { fill( 4, 0) }
(const byte*) SCREEN = (byte*)(number) $400
(const byte) SIZEOF_STRUCT_PERSON = (byte) 5
(byte) idx
(byte) idx#0
(byte) idx#1
(byte) idx#10
(byte) idx#11
(byte) idx#12
(byte) idx#13
(byte) idx#14
(byte) idx#15
(byte) idx#16
(byte) idx#17
(byte) idx#18
(byte) idx#19
(byte) idx#2
(byte) idx#3
(byte) idx#4
(byte) idx#5
(byte) idx#6
(byte) idx#7
(byte) idx#8
(byte) idx#9
(void()) main()
(label) main::@1
(label) main::@2
(label) main::@return
(struct Person*) main::person
(struct Person*) main::person#0
(struct Person*) main::person#1
(struct Person*) main::person#2
(const struct Person*) persons[]  = { { id: (byte) 1, initials: (string) "jgr" }, { id: (byte) 8, initials: (string) "hbg" } }
(void()) print_person((struct Person*) print_person::person)
(byte~) print_person::$0
(byte*~) print_person::$1
(byte*~) print_person::$2
(byte*~) print_person::$3
(byte*~) print_person::$4
(label) print_person::@return
(struct Person*) print_person::person
(struct Person*) print_person::person#0
(struct Person*) print_person::person#1
(struct Person*) print_person::person#2

Adding number conversion cast (unumber) 0 in *((const byte*) SCREEN + (byte) idx#5) ← *((byte*~) print_person::$2 + (number) 0)
Adding number conversion cast (unumber) 1 in *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (number) 1)
Adding number conversion cast (unumber) 2 in *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (number) 2)
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 0
Simplifying constant integer cast 1
Simplifying constant integer cast 2
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) 1
Finalized unsigned number type (byte) 2
Successful SSA optimization PassNFinalizeNumberTypeConversions
Alias (struct Person*) main::person#0 = (struct Person*) main::person#2 
Alias (byte) idx#0 = (byte) idx#12 
Alias (byte) idx#1 = (byte) idx#13 (byte) idx#14 (byte) idx#2 
Alias (byte) idx#10 = (byte) idx#16 (byte) idx#9 
Alias (byte) idx#19 = (byte) idx#3 
Alias (byte) idx#11 = (byte) idx#17 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values (byte) idx#18 (byte) idx#19
Identical Phi Values (byte) idx#0 (byte) idx#10
Identical Phi Values (byte) idx#1 (byte) idx#10
Identical Phi Values (byte) idx#11 (byte) idx#1
Successful SSA optimization Pass2IdenticalPhiElimination
Constant (const struct Person*) main::person#0 = persons
Constant (const byte) idx#19 = 0
Successful SSA optimization Pass2ConstantIdentification
Constant (const struct Person*) print_person::person#0 = main::person#0
Successful SSA optimization Pass2ConstantIdentification
Converting *(pointer+n) to pointer[n] [17] (byte~) print_person::$0 ← (byte) '0' + *((byte*~) print_person::$1)  -- *((byte*)print_person::person#2 + OFFSET_STRUCT_PERSON_ID)
Successful SSA optimization Pass2InlineDerefIdx
Simplifying expression containing zero (byte*)print_person::person#2 in [16] (byte*~) print_person::$1 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_ID
Simplifying expression containing zero (byte*)print_person::person#2 in [17] (byte~) print_person::$0 ← (byte) '0' + *((byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_ID)
Simplifying expression containing zero print_person::$2 in [23] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*~) print_person::$2 + (byte) 0)
Successful SSA optimization PassNSimplifyExpressionWithZero
Eliminating unused variable (byte*~) print_person::$1 and assignment [6] (byte*~) print_person::$1 ← (byte*)(struct Person*) print_person::person#2
Eliminating unused constant (const byte) OFFSET_STRUCT_PERSON_ID
Successful SSA optimization PassNEliminateUnusedVars
Constant right-side identified [1] (struct Person*) main::person#1 ← (const struct Person*) main::person#0 + (const byte) SIZEOF_STRUCT_PERSON
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant (const struct Person*) main::person#1 = main::person#0+SIZEOF_STRUCT_PERSON
Successful SSA optimization Pass2ConstantIdentification
Constant (const struct Person*) print_person::person#1 = main::person#1
Successful SSA optimization Pass2ConstantIdentification
Converting *(pointer+n) to pointer[n] [12] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*~) print_person::$2)  -- *((byte*)print_person::person#2 + OFFSET_STRUCT_PERSON_INITIALS)
Successful SSA optimization Pass2InlineDerefIdx
Eliminating unused variable (byte*~) print_person::$2 and assignment [9] (byte*~) print_person::$2 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS
Successful SSA optimization PassNEliminateUnusedVars
Inlining constant with different constant siblings (const struct Person*) main::person#0
Inlining constant with var siblings (const struct Person*) print_person::person#0
Inlining constant with var siblings (const struct Person*) print_person::person#1
Inlining constant with var siblings (const byte) idx#19
Constant inlined idx#19 = (byte) 0
Constant inlined print_person::person#0 = (const struct Person*) persons
Constant inlined main::person#0 = (const struct Person*) persons
Constant inlined print_person::person#1 = (const struct Person*) main::person#1
Successful SSA optimization Pass2ConstantInlining
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @1
Adding NOP phi() at start of @2
Adding NOP phi() at start of @3
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
Adding NOP phi() at start of main::@2
CALL GRAPH
Calls in [] to main:3 
Calls in [main] to print_person:7 print_person:9 

Created 2 initial phi equivalence classes
Coalesced [8] idx#20 ← idx#10
Coalesced down to 2 phi equivalence classes
Culled Empty Block (label) @1
Culled Empty Block (label) @3
Culled Empty Block (label) main::@2
Renumbering block @2 to @1
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @1
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
Adding NOP phi() at start of main::@1

FINAL CONTROL FLOW GRAPH
@begin: scope:[]  from
  [0] phi()
  to:@1
@1: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @1
  [3] phi()

(void()) main()
main: scope:[main]  from @1
  [4] phi()
  [5] call print_person 
  to:main::@1
main::@1: scope:[main]  from main
  [6] phi()
  [7] call print_person 
  to:main::@return
main::@return: scope:[main]  from main::@1
  [8] return 
  to:@return

(void()) print_person((struct Person*) print_person::person)
print_person: scope:[print_person]  from main main::@1
  [9] (byte) idx#15 ← phi( main/(byte) 0 main::@1/(byte) idx#10 )
  [9] (struct Person*) print_person::person#2 ← phi( main/(const struct Person*) persons main::@1/(const struct Person*) main::person#1 )
  [10] (byte~) print_person::$0 ← (byte) '0' + *((byte*)(struct Person*) print_person::person#2)
  [11] *((const byte*) SCREEN + (byte) idx#15) ← (byte~) print_person::$0
  [12] (byte) idx#4 ← ++ (byte) idx#15
  [13] *((const byte*) SCREEN + (byte) idx#4) ← (byte) ' '
  [14] (byte) idx#5 ← ++ (byte) idx#4
  [15] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS)
  [16] (byte) idx#6 ← ++ (byte) idx#5
  [17] (byte*~) print_person::$3 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS
  [18] *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (byte) 1)
  [19] (byte) idx#7 ← ++ (byte) idx#6
  [20] (byte*~) print_person::$4 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS
  [21] *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (byte) 2)
  [22] (byte) idx#8 ← ++ (byte) idx#7
  [23] *((const byte*) SCREEN + (byte) idx#8) ← (byte) ' '
  [24] (byte) idx#10 ← ++ (byte) idx#8
  to:print_person::@return
print_person::@return: scope:[print_person]  from print_person
  [25] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(byte) Person::id
(byte) idx
(byte) idx#10 1.0
(byte) idx#15 2.0
(byte) idx#4 3.0
(byte) idx#5 3.0
(byte) idx#6 2.0
(byte) idx#7 2.0
(byte) idx#8 3.0
(void()) main()
(struct Person*) main::person
(void()) print_person((struct Person*) print_person::person)
(byte~) print_person::$0 4.0
(byte*~) print_person::$3 4.0
(byte*~) print_person::$4 4.0
(struct Person*) print_person::person
(struct Person*) print_person::person#2

Initial phi equivalence classes
[ print_person::person#2 ]
[ idx#15 idx#10 ]
Added variable print_person::$0 to live range equivalence class [ print_person::$0 ]
Added variable idx#4 to live range equivalence class [ idx#4 ]
Added variable idx#5 to live range equivalence class [ idx#5 ]
Added variable idx#6 to live range equivalence class [ idx#6 ]
Added variable print_person::$3 to live range equivalence class [ print_person::$3 ]
Added variable idx#7 to live range equivalence class [ idx#7 ]
Added variable print_person::$4 to live range equivalence class [ print_person::$4 ]
Added variable idx#8 to live range equivalence class [ idx#8 ]
Complete equivalence classes
[ print_person::person#2 ]
[ idx#15 idx#10 ]
[ print_person::$0 ]
[ idx#4 ]
[ idx#5 ]
[ idx#6 ]
[ print_person::$3 ]
[ idx#7 ]
[ print_person::$4 ]
[ idx#8 ]
Allocated zp[2]:2 [ print_person::person#2 ]
Allocated zp[1]:4 [ idx#15 idx#10 ]
Allocated zp[1]:5 [ print_person::$0 ]
Allocated zp[1]:6 [ idx#4 ]
Allocated zp[1]:7 [ idx#5 ]
Allocated zp[1]:8 [ idx#6 ]
Allocated zp[2]:9 [ print_person::$3 ]
Allocated zp[1]:11 [ idx#7 ]
Allocated zp[2]:12 [ print_person::$4 ]
Allocated zp[1]:14 [ idx#8 ]

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Example of a struct containing an array
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .const SIZEOF_STRUCT_PERSON = 5
  .const OFFSET_STRUCT_PERSON_INITIALS = 1
  .label idx = 6
  .label idx_1 = 7
  .label idx_2 = 8
  .label idx_3 = $b
  .label idx_4 = $e
  .label idx_5 = 4
  // @begin
__bbegin:
  // [1] phi from @begin to @1 [phi:@begin->@1]
__b1_from___bbegin:
  jmp __b1
  // @1
__b1:
  // [2] call main 
  // [4] phi from @1 to main [phi:@1->main]
main_from___b1:
  jsr main
  // [3] phi from @1 to @end [phi:@1->@end]
__bend_from___b1:
  jmp __bend
  // @end
__bend:
  // main
main: {
    .label person = persons+SIZEOF_STRUCT_PERSON
    // [5] call print_person 
    // [9] phi from main to print_person [phi:main->print_person]
  print_person_from_main:
    // [9] phi (byte) idx#15 = (byte) 0 [phi:main->print_person#0] -- vbuz1=vbuc1 
    lda #0
    sta.z idx_5
    // [9] phi (struct Person*) print_person::person#2 = (const struct Person*) persons [phi:main->print_person#1] -- pssz1=pssc1 
    lda #<persons
    sta.z print_person.person
    lda #>persons
    sta.z print_person.person+1
    jsr print_person
    // [6] phi from main to main::@1 [phi:main->main::@1]
  __b1_from_main:
    jmp __b1
    // main::@1
  __b1:
    // [7] call print_person 
    // [9] phi from main::@1 to print_person [phi:main::@1->print_person]
  print_person_from___b1:
    // [9] phi (byte) idx#15 = (byte) idx#10 [phi:main::@1->print_person#0] -- register_copy 
    // [9] phi (struct Person*) print_person::person#2 = (const struct Person*) main::person#1 [phi:main::@1->print_person#1] -- pssz1=pssc1 
    lda #<person
    sta.z print_person.person
    lda #>person
    sta.z print_person.person+1
    jsr print_person
    jmp __breturn
    // main::@return
  __breturn:
    // [8] return 
    rts
}
  // print_person
// print_person(struct Person* zp(2) person)
print_person: {
    .label __0 = 5
    .label __3 = 9
    .label __4 = $c
    .label person = 2
    // [10] (byte~) print_person::$0 ← (byte) '0' + *((byte*)(struct Person*) print_person::person#2) -- vbuz1=vbuc1_plus__deref_pbuz2 
    lda #'0'
    clc
    ldy #0
    adc (person),y
    sta.z __0
    // [11] *((const byte*) SCREEN + (byte) idx#15) ← (byte~) print_person::$0 -- pbuc1_derefidx_vbuz1=vbuz2 
    lda.z __0
    ldy.z idx_5
    sta SCREEN,y
    // [12] (byte) idx#4 ← ++ (byte) idx#15 -- vbuz1=_inc_vbuz2 
    ldy.z idx_5
    iny
    sty.z idx
    // [13] *((const byte*) SCREEN + (byte) idx#4) ← (byte) ' ' -- pbuc1_derefidx_vbuz1=vbuc2 
    lda #' '
    ldy.z idx
    sta SCREEN,y
    // [14] (byte) idx#5 ← ++ (byte) idx#4 -- vbuz1=_inc_vbuz2 
    ldy.z idx
    iny
    sty.z idx_1
    // [15] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS) -- pbuc1_derefidx_vbuz1=pbuz2_derefidx_vbuc2 
    ldx.z idx_1
    ldy #OFFSET_STRUCT_PERSON_INITIALS
    lda (person),y
    sta SCREEN,x
    // [16] (byte) idx#6 ← ++ (byte) idx#5 -- vbuz1=_inc_vbuz2 
    ldy.z idx_1
    iny
    sty.z idx_2
    // [17] (byte*~) print_person::$3 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS -- pbuz1=pbuz2_plus_vbuc1 
    lda #OFFSET_STRUCT_PERSON_INITIALS
    clc
    adc.z person
    sta.z __3
    lda #0
    adc.z person+1
    sta.z __3+1
    // [18] *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (byte) 1) -- pbuc1_derefidx_vbuz1=pbuz2_derefidx_vbuc2 
    ldx.z idx_2
    ldy #1
    lda (__3),y
    sta SCREEN,x
    // [19] (byte) idx#7 ← ++ (byte) idx#6 -- vbuz1=_inc_vbuz2 
    ldy.z idx_2
    iny
    sty.z idx_3
    // [20] (byte*~) print_person::$4 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS -- pbuz1=pbuz2_plus_vbuc1 
    lda #OFFSET_STRUCT_PERSON_INITIALS
    clc
    adc.z person
    sta.z __4
    lda #0
    adc.z person+1
    sta.z __4+1
    // [21] *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (byte) 2) -- pbuc1_derefidx_vbuz1=pbuz2_derefidx_vbuc2 
    ldx.z idx_3
    ldy #2
    lda (__4),y
    sta SCREEN,x
    // [22] (byte) idx#8 ← ++ (byte) idx#7 -- vbuz1=_inc_vbuz2 
    ldy.z idx_3
    iny
    sty.z idx_4
    // [23] *((const byte*) SCREEN + (byte) idx#8) ← (byte) ' ' -- pbuc1_derefidx_vbuz1=vbuc2 
    lda #' '
    ldy.z idx_4
    sta SCREEN,y
    // [24] (byte) idx#10 ← ++ (byte) idx#8 -- vbuz1=_inc_vbuz2 
    ldy.z idx_4
    iny
    sty.z idx_5
    jmp __breturn
    // print_person::@return
  __breturn:
    // [25] return 
    rts
}
  // File Data
  persons: .byte 1
  .text "jgr"
  .byte 0, 8
  .text "hbg"
  .byte 0

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [10] (byte~) print_person::$0 ← (byte) '0' + *((byte*)(struct Person*) print_person::person#2) [ print_person::person#2 idx#15 print_person::$0 ] ( main:2::print_person:5 [ print_person::person#2 idx#15 print_person::$0 ] main:2::print_person:7 [ print_person::person#2 idx#15 print_person::$0 ] ) always clobbers reg byte a reg byte y 
Removing always clobbered register reg byte a as potential for zp[1]:4 [ idx#15 idx#10 ]
Removing always clobbered register reg byte y as potential for zp[1]:4 [ idx#15 idx#10 ]
Statement [13] *((const byte*) SCREEN + (byte) idx#4) ← (byte) ' ' [ print_person::person#2 idx#4 ] ( main:2::print_person:5 [ print_person::person#2 idx#4 ] main:2::print_person:7 [ print_person::person#2 idx#4 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp[1]:6 [ idx#4 ]
Statement [15] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS) [ print_person::person#2 idx#5 ] ( main:2::print_person:5 [ print_person::person#2 idx#5 ] main:2::print_person:7 [ print_person::person#2 idx#5 ] ) always clobbers reg byte a reg byte y 
Removing always clobbered register reg byte a as potential for zp[1]:7 [ idx#5 ]
Removing always clobbered register reg byte y as potential for zp[1]:7 [ idx#5 ]
Statement [17] (byte*~) print_person::$3 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS [ print_person::person#2 idx#6 print_person::$3 ] ( main:2::print_person:5 [ print_person::person#2 idx#6 print_person::$3 ] main:2::print_person:7 [ print_person::person#2 idx#6 print_person::$3 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp[1]:8 [ idx#6 ]
Statement [18] *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (byte) 1) [ print_person::person#2 idx#6 ] ( main:2::print_person:5 [ print_person::person#2 idx#6 ] main:2::print_person:7 [ print_person::person#2 idx#6 ] ) always clobbers reg byte a reg byte y 
Removing always clobbered register reg byte y as potential for zp[1]:8 [ idx#6 ]
Statement [20] (byte*~) print_person::$4 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS [ idx#7 print_person::$4 ] ( main:2::print_person:5 [ idx#7 print_person::$4 ] main:2::print_person:7 [ idx#7 print_person::$4 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp[1]:11 [ idx#7 ]
Statement [21] *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (byte) 2) [ idx#7 ] ( main:2::print_person:5 [ idx#7 ] main:2::print_person:7 [ idx#7 ] ) always clobbers reg byte a reg byte y 
Removing always clobbered register reg byte y as potential for zp[1]:11 [ idx#7 ]
Statement [23] *((const byte*) SCREEN + (byte) idx#8) ← (byte) ' ' [ idx#8 ] ( main:2::print_person:5 [ idx#8 ] main:2::print_person:7 [ idx#8 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp[1]:14 [ idx#8 ]
Statement [10] (byte~) print_person::$0 ← (byte) '0' + *((byte*)(struct Person*) print_person::person#2) [ print_person::person#2 idx#15 print_person::$0 ] ( main:2::print_person:5 [ print_person::person#2 idx#15 print_person::$0 ] main:2::print_person:7 [ print_person::person#2 idx#15 print_person::$0 ] ) always clobbers reg byte a reg byte y 
Statement [13] *((const byte*) SCREEN + (byte) idx#4) ← (byte) ' ' [ print_person::person#2 idx#4 ] ( main:2::print_person:5 [ print_person::person#2 idx#4 ] main:2::print_person:7 [ print_person::person#2 idx#4 ] ) always clobbers reg byte a 
Statement [15] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS) [ print_person::person#2 idx#5 ] ( main:2::print_person:5 [ print_person::person#2 idx#5 ] main:2::print_person:7 [ print_person::person#2 idx#5 ] ) always clobbers reg byte a reg byte y 
Statement [17] (byte*~) print_person::$3 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS [ print_person::person#2 idx#6 print_person::$3 ] ( main:2::print_person:5 [ print_person::person#2 idx#6 print_person::$3 ] main:2::print_person:7 [ print_person::person#2 idx#6 print_person::$3 ] ) always clobbers reg byte a 
Statement [18] *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (byte) 1) [ print_person::person#2 idx#6 ] ( main:2::print_person:5 [ print_person::person#2 idx#6 ] main:2::print_person:7 [ print_person::person#2 idx#6 ] ) always clobbers reg byte a reg byte y 
Statement [20] (byte*~) print_person::$4 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS [ idx#7 print_person::$4 ] ( main:2::print_person:5 [ idx#7 print_person::$4 ] main:2::print_person:7 [ idx#7 print_person::$4 ] ) always clobbers reg byte a 
Statement [21] *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (byte) 2) [ idx#7 ] ( main:2::print_person:5 [ idx#7 ] main:2::print_person:7 [ idx#7 ] ) always clobbers reg byte a reg byte y 
Statement [23] *((const byte*) SCREEN + (byte) idx#8) ← (byte) ' ' [ idx#8 ] ( main:2::print_person:5 [ idx#8 ] main:2::print_person:7 [ idx#8 ] ) always clobbers reg byte a 
Potential registers zp[2]:2 [ print_person::person#2 ] : zp[2]:2 , 
Potential registers zp[1]:4 [ idx#15 idx#10 ] : zp[1]:4 , reg byte x , 
Potential registers zp[1]:5 [ print_person::$0 ] : zp[1]:5 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:6 [ idx#4 ] : zp[1]:6 , reg byte x , reg byte y , 
Potential registers zp[1]:7 [ idx#5 ] : zp[1]:7 , reg byte x , 
Potential registers zp[1]:8 [ idx#6 ] : zp[1]:8 , reg byte x , 
Potential registers zp[2]:9 [ print_person::$3 ] : zp[2]:9 , 
Potential registers zp[1]:11 [ idx#7 ] : zp[1]:11 , reg byte x , 
Potential registers zp[2]:12 [ print_person::$4 ] : zp[2]:12 , 
Potential registers zp[1]:14 [ idx#8 ] : zp[1]:14 , reg byte x , reg byte y , 

REGISTER UPLIFT SCOPES
Uplift Scope [] 3: zp[1]:4 [ idx#15 idx#10 ] 3: zp[1]:6 [ idx#4 ] 3: zp[1]:7 [ idx#5 ] 3: zp[1]:14 [ idx#8 ] 2: zp[1]:8 [ idx#6 ] 2: zp[1]:11 [ idx#7 ] 
Uplift Scope [print_person] 4: zp[1]:5 [ print_person::$0 ] 4: zp[2]:9 [ print_person::$3 ] 4: zp[2]:12 [ print_person::$4 ] 0: zp[2]:2 [ print_person::person#2 ] 
Uplift Scope [Person] 
Uplift Scope [main] 

Uplifting [] best 196 combination reg byte x [ idx#15 idx#10 ] reg byte x [ idx#4 ] reg byte x [ idx#5 ] reg byte x [ idx#8 ] reg byte x [ idx#6 ] zp[1]:11 [ idx#7 ] 
Limited combination testing to 100 combinations of 144 possible.
Uplifting [print_person] best 190 combination reg byte a [ print_person::$0 ] zp[2]:9 [ print_person::$3 ] zp[2]:12 [ print_person::$4 ] zp[2]:2 [ print_person::person#2 ] 
Uplifting [Person] best 190 combination 
Uplifting [main] best 190 combination 
Attempting to uplift remaining variables inzp[1]:11 [ idx#7 ]
Uplifting [] best 181 combination reg byte x [ idx#7 ] 
Coalescing zero page register [ zp[2]:2 [ print_person::person#2 ] ] with [ zp[2]:12 [ print_person::$4 ] ] - score: 1
Allocated (was zp[2]:9) zp[2]:4 [ print_person::$3 ]

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Example of a struct containing an array
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .const SIZEOF_STRUCT_PERSON = 5
  .const OFFSET_STRUCT_PERSON_INITIALS = 1
  // @begin
__bbegin:
  // [1] phi from @begin to @1 [phi:@begin->@1]
__b1_from___bbegin:
  jmp __b1
  // @1
__b1:
  // [2] call main 
  // [4] phi from @1 to main [phi:@1->main]
main_from___b1:
  jsr main
  // [3] phi from @1 to @end [phi:@1->@end]
__bend_from___b1:
  jmp __bend
  // @end
__bend:
  // main
main: {
    .label person = persons+SIZEOF_STRUCT_PERSON
    // [5] call print_person 
    // [9] phi from main to print_person [phi:main->print_person]
  print_person_from_main:
    // [9] phi (byte) idx#15 = (byte) 0 [phi:main->print_person#0] -- vbuxx=vbuc1 
    ldx #0
    // [9] phi (struct Person*) print_person::person#2 = (const struct Person*) persons [phi:main->print_person#1] -- pssz1=pssc1 
    lda #<persons
    sta.z print_person.person
    lda #>persons
    sta.z print_person.person+1
    jsr print_person
    // [6] phi from main to main::@1 [phi:main->main::@1]
  __b1_from_main:
    jmp __b1
    // main::@1
  __b1:
    // [7] call print_person 
    // [9] phi from main::@1 to print_person [phi:main::@1->print_person]
  print_person_from___b1:
    // [9] phi (byte) idx#15 = (byte) idx#10 [phi:main::@1->print_person#0] -- register_copy 
    // [9] phi (struct Person*) print_person::person#2 = (const struct Person*) main::person#1 [phi:main::@1->print_person#1] -- pssz1=pssc1 
    lda #<person
    sta.z print_person.person
    lda #>person
    sta.z print_person.person+1
    jsr print_person
    jmp __breturn
    // main::@return
  __breturn:
    // [8] return 
    rts
}
  // print_person
// print_person(struct Person* zp(2) person)
print_person: {
    .label __3 = 4
    .label __4 = 2
    .label person = 2
    // [10] (byte~) print_person::$0 ← (byte) '0' + *((byte*)(struct Person*) print_person::person#2) -- vbuaa=vbuc1_plus__deref_pbuz1 
    lda #'0'
    clc
    ldy #0
    adc (person),y
    // [11] *((const byte*) SCREEN + (byte) idx#15) ← (byte~) print_person::$0 -- pbuc1_derefidx_vbuxx=vbuaa 
    sta SCREEN,x
    // [12] (byte) idx#4 ← ++ (byte) idx#15 -- vbuxx=_inc_vbuxx 
    inx
    // [13] *((const byte*) SCREEN + (byte) idx#4) ← (byte) ' ' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #' '
    sta SCREEN,x
    // [14] (byte) idx#5 ← ++ (byte) idx#4 -- vbuxx=_inc_vbuxx 
    inx
    // [15] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS) -- pbuc1_derefidx_vbuxx=pbuz1_derefidx_vbuc2 
    ldy #OFFSET_STRUCT_PERSON_INITIALS
    lda (person),y
    sta SCREEN,x
    // [16] (byte) idx#6 ← ++ (byte) idx#5 -- vbuxx=_inc_vbuxx 
    inx
    // [17] (byte*~) print_person::$3 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS -- pbuz1=pbuz2_plus_vbuc1 
    lda #OFFSET_STRUCT_PERSON_INITIALS
    clc
    adc.z person
    sta.z __3
    lda #0
    adc.z person+1
    sta.z __3+1
    // [18] *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (byte) 1) -- pbuc1_derefidx_vbuxx=pbuz1_derefidx_vbuc2 
    ldy #1
    lda (__3),y
    sta SCREEN,x
    // [19] (byte) idx#7 ← ++ (byte) idx#6 -- vbuxx=_inc_vbuxx 
    inx
    // [20] (byte*~) print_person::$4 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS -- pbuz1=pbuz1_plus_vbuc1 
    lda #OFFSET_STRUCT_PERSON_INITIALS
    clc
    adc.z __4
    sta.z __4
    bcc !+
    inc.z __4+1
  !:
    // [21] *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (byte) 2) -- pbuc1_derefidx_vbuxx=pbuz1_derefidx_vbuc2 
    ldy #2
    lda (__4),y
    sta SCREEN,x
    // [22] (byte) idx#8 ← ++ (byte) idx#7 -- vbuxx=_inc_vbuxx 
    inx
    // [23] *((const byte*) SCREEN + (byte) idx#8) ← (byte) ' ' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #' '
    sta SCREEN,x
    // [24] (byte) idx#10 ← ++ (byte) idx#8 -- vbuxx=_inc_vbuxx 
    inx
    jmp __breturn
    // print_person::@return
  __breturn:
    // [25] return 
    rts
}
  // File Data
  persons: .byte 1
  .text "jgr"
  .byte 0, 8
  .text "hbg"
  .byte 0

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp __b1
Removing instruction jmp __bend
Removing instruction jmp __b1
Removing instruction jmp __breturn
Removing instruction jmp __breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing instruction lda #OFFSET_STRUCT_PERSON_INITIALS with TYA
Replacing label __bbegin with __b1
Removing instruction __bbegin:
Removing instruction __b1_from___bbegin:
Removing instruction main_from___b1:
Removing instruction __bend_from___b1:
Removing instruction __b1_from_main:
Removing instruction print_person_from___b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction __bend:
Removing instruction print_person_from_main:
Removing instruction __b1:
Removing instruction __breturn:
Removing instruction __breturn:
Succesful ASM optimization Pass5UnusedLabelElimination
Updating BasicUpstart to call main directly
Removing instruction jsr main
Succesful ASM optimization Pass5SkipBegin
Removing instruction __b1:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(const byte) OFFSET_STRUCT_PERSON_INITIALS = (byte) 1
(byte) Person::id
(const byte*) Person::initials[(number) 4]  = { fill( 4, 0) }
(const byte*) SCREEN = (byte*) 1024
(const byte) SIZEOF_STRUCT_PERSON = (byte) 5
(byte) idx
(byte) idx#10 reg byte x 1.0
(byte) idx#15 reg byte x 2.0
(byte) idx#4 reg byte x 3.0
(byte) idx#5 reg byte x 3.0
(byte) idx#6 reg byte x 2.0
(byte) idx#7 reg byte x 2.0
(byte) idx#8 reg byte x 3.0
(void()) main()
(label) main::@1
(label) main::@return
(struct Person*) main::person
(const struct Person*) main::person#1 person = (const struct Person*) persons+(const byte) SIZEOF_STRUCT_PERSON
(const struct Person*) persons[]  = { { id: (byte) 1, initials: (string) "jgr" }, { id: (byte) 8, initials: (string) "hbg" } }
(void()) print_person((struct Person*) print_person::person)
(byte~) print_person::$0 reg byte a 4.0
(byte*~) print_person::$3 zp[2]:4 4.0
(byte*~) print_person::$4 zp[2]:2 4.0
(label) print_person::@return
(struct Person*) print_person::person
(struct Person*) print_person::person#2 person zp[2]:2

zp[2]:2 [ print_person::person#2 print_person::$4 ]
reg byte x [ idx#15 idx#10 ]
reg byte a [ print_person::$0 ]
reg byte x [ idx#4 ]
reg byte x [ idx#5 ]
reg byte x [ idx#6 ]
zp[2]:4 [ print_person::$3 ]
reg byte x [ idx#7 ]
reg byte x [ idx#8 ]


FINAL ASSEMBLER
Score: 159

  // File Comments
// Example of a struct containing an array
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .const SIZEOF_STRUCT_PERSON = 5
  .const OFFSET_STRUCT_PERSON_INITIALS = 1
  // @begin
  // [1] phi from @begin to @1 [phi:@begin->@1]
  // @1
  // [2] call main 
  // [4] phi from @1 to main [phi:@1->main]
  // [3] phi from @1 to @end [phi:@1->@end]
  // @end
  // main
main: {
    .label person = persons+SIZEOF_STRUCT_PERSON
    // print_person(person)
    // [5] call print_person 
    // [9] phi from main to print_person [phi:main->print_person]
    // [9] phi (byte) idx#15 = (byte) 0 [phi:main->print_person#0] -- vbuxx=vbuc1 
    ldx #0
    // [9] phi (struct Person*) print_person::person#2 = (const struct Person*) persons [phi:main->print_person#1] -- pssz1=pssc1 
    lda #<persons
    sta.z print_person.person
    lda #>persons
    sta.z print_person.person+1
    jsr print_person
    // [6] phi from main to main::@1 [phi:main->main::@1]
    // main::@1
    // print_person(person)
    // [7] call print_person 
    // [9] phi from main::@1 to print_person [phi:main::@1->print_person]
    // [9] phi (byte) idx#15 = (byte) idx#10 [phi:main::@1->print_person#0] -- register_copy 
    // [9] phi (struct Person*) print_person::person#2 = (const struct Person*) main::person#1 [phi:main::@1->print_person#1] -- pssz1=pssc1 
    lda #<person
    sta.z print_person.person
    lda #>person
    sta.z print_person.person+1
    jsr print_person
    // main::@return
    // }
    // [8] return 
    rts
}
  // print_person
// print_person(struct Person* zp(2) person)
print_person: {
    .label __3 = 4
    .label __4 = 2
    .label person = 2
    // '0'+person->id
    // [10] (byte~) print_person::$0 ← (byte) '0' + *((byte*)(struct Person*) print_person::person#2) -- vbuaa=vbuc1_plus__deref_pbuz1 
    lda #'0'
    clc
    ldy #0
    adc (person),y
    // SCREEN[idx++] = '0'+person->id
    // [11] *((const byte*) SCREEN + (byte) idx#15) ← (byte~) print_person::$0 -- pbuc1_derefidx_vbuxx=vbuaa 
    sta SCREEN,x
    // SCREEN[idx++] = '0'+person->id;
    // [12] (byte) idx#4 ← ++ (byte) idx#15 -- vbuxx=_inc_vbuxx 
    inx
    // SCREEN[idx++] = ' '
    // [13] *((const byte*) SCREEN + (byte) idx#4) ← (byte) ' ' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #' '
    sta SCREEN,x
    // SCREEN[idx++] = ' ';
    // [14] (byte) idx#5 ← ++ (byte) idx#4 -- vbuxx=_inc_vbuxx 
    inx
    // SCREEN[idx++] = person->initials[0]
    // [15] *((const byte*) SCREEN + (byte) idx#5) ← *((byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS) -- pbuc1_derefidx_vbuxx=pbuz1_derefidx_vbuc2 
    ldy #OFFSET_STRUCT_PERSON_INITIALS
    lda (person),y
    sta SCREEN,x
    // SCREEN[idx++] = person->initials[0];
    // [16] (byte) idx#6 ← ++ (byte) idx#5 -- vbuxx=_inc_vbuxx 
    inx
    // SCREEN[idx++] = person->initials[1]
    // [17] (byte*~) print_person::$3 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS -- pbuz1=pbuz2_plus_vbuc1 
    tya
    clc
    adc.z person
    sta.z __3
    lda #0
    adc.z person+1
    sta.z __3+1
    // [18] *((const byte*) SCREEN + (byte) idx#6) ← *((byte*~) print_person::$3 + (byte) 1) -- pbuc1_derefidx_vbuxx=pbuz1_derefidx_vbuc2 
    ldy #1
    lda (__3),y
    sta SCREEN,x
    // SCREEN[idx++] = person->initials[1];
    // [19] (byte) idx#7 ← ++ (byte) idx#6 -- vbuxx=_inc_vbuxx 
    inx
    // SCREEN[idx++] = person->initials[2]
    // [20] (byte*~) print_person::$4 ← (byte*)(struct Person*) print_person::person#2 + (const byte) OFFSET_STRUCT_PERSON_INITIALS -- pbuz1=pbuz1_plus_vbuc1 
    lda #OFFSET_STRUCT_PERSON_INITIALS
    clc
    adc.z __4
    sta.z __4
    bcc !+
    inc.z __4+1
  !:
    // [21] *((const byte*) SCREEN + (byte) idx#7) ← *((byte*~) print_person::$4 + (byte) 2) -- pbuc1_derefidx_vbuxx=pbuz1_derefidx_vbuc2 
    ldy #2
    lda (__4),y
    sta SCREEN,x
    // SCREEN[idx++] = person->initials[2];
    // [22] (byte) idx#8 ← ++ (byte) idx#7 -- vbuxx=_inc_vbuxx 
    inx
    // SCREEN[idx++] = ' '
    // [23] *((const byte*) SCREEN + (byte) idx#8) ← (byte) ' ' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #' '
    sta SCREEN,x
    // SCREEN[idx++] = ' ';
    // [24] (byte) idx#10 ← ++ (byte) idx#8 -- vbuxx=_inc_vbuxx 
    inx
    // print_person::@return
    // }
    // [25] return 
    rts
}
  // File Data
  persons: .byte 1
  .text "jgr"
  .byte 0, 8
  .text "hbg"
  .byte 0

