CONTROL FLOW GRAPH SSA

void main()
main: scope:[main]  from __start
  main::screen#0 = (char *)$400
  main::txt#0 = Text
  main::i#0 = 0
  to:main::@1
main::@1: scope:[main]  from main main::@5
  main::screen#7 = phi( main/main::screen#0, main::@5/main::screen#2 )
  main::txt#4 = phi( main/main::txt#0, main::@5/main::txt#1 )
  main::i#2 = phi( main/main::i#0, main::@5/main::i#1 )
  main::$0 = sizeof  Text
  main::$1 = main::$0 / SIZEOF_STRUCT_$0
  main::$2 = main::i#2 < main::$1
  if(main::$2) goto main::@2
  to:main::@return
main::@2: scope:[main]  from main::@1
  main::i#5 = phi( main::@1/main::i#2 )
  main::screen#6 = phi( main::@1/main::screen#7 )
  main::txt#2 = phi( main::@1/main::txt#4 )
  main::$4 = (char **)main::txt#2
  main::$3 = main::$4 + OFFSET_STRUCT_$0_MSG
  main::msg#0 = *main::$3
  to:main::@3
main::@3: scope:[main]  from main::@2 main::@4
  main::txt#5 = phi( main::@2/main::txt#2, main::@4/main::txt#6 )
  main::i#4 = phi( main::@2/main::i#5, main::@4/main::i#6 )
  main::screen#5 = phi( main::@2/main::screen#6, main::@4/main::screen#1 )
  main::msg#2 = phi( main::@2/main::msg#0, main::@4/main::msg#1 )
  main::$5 = 0 != *main::msg#2
  if(main::$5) goto main::@4
  to:main::@5
main::@4: scope:[main]  from main::@3
  main::txt#6 = phi( main::@3/main::txt#5 )
  main::i#6 = phi( main::@3/main::i#4 )
  main::screen#3 = phi( main::@3/main::screen#5 )
  main::msg#3 = phi( main::@3/main::msg#2 )
  *main::screen#3 = *main::msg#3
  main::screen#1 = ++ main::screen#3
  main::msg#1 = ++ main::msg#3
  to:main::@3
main::@5: scope:[main]  from main::@3
  main::txt#3 = phi( main::@3/main::txt#5 )
  main::i#3 = phi( main::@3/main::i#4 )
  main::screen#4 = phi( main::@3/main::screen#5 )
  *main::screen#4 = ' '
  main::screen#2 = ++ main::screen#4
  main::i#1 = ++ main::i#3
  main::txt#1 = main::txt#3 + SIZEOF_STRUCT_$0
  to:main::@1
main::@return: scope:[main]  from main::@1
  return 
  to:@return

void __start()
__start: scope:[__start]  from
  call main
  to:__start::@1
__start::@1: scope:[__start]  from __start
  to:__start::@return
__start::@return: scope:[__start]  from __start::@1
  return 
  to:@return

SYMBOL TABLE SSA
__constant char $0_msg[$18] = "Wolfgang Amadeus Mozart"
__constant char $0_msg1[$19] = ""Eine kleine Nachtmusik""
__constant char $0_msg10[$16] = "Ullrich von Bassewitz"
__constant char $0_msg11[$19] = "Press any key to quit..."
__constant char $0_msg2[9] = "(KV 525)"
__constant char $0_msg3[$1d] = "Ported to the SID in 1987 by"
__constant char $0_msg4[$16] = "Joachim von Bassewitz"
__constant char $0_msg5[$1b] = "(joachim@von-bassewitz.de)"
__constant char $0_msg6[4] = "and"
__constant char $0_msg7[$16] = "Ullrich von Bassewitz"
__constant char $0_msg8[$1b] = "(ullrich@von-bassewitz.de)"
__constant char $0_msg9[$14] = "C Implementation by"
__constant char OFFSET_STRUCT_$0_MSG = 1
__constant char SIZEOF_STRUCT_$0 = 3
__constant struct $0 Text[] = { { Y: 2, Msg: $0_msg }, { Y: 4, Msg: $0_msg1 }, { Y: 5, Msg: $0_msg2 }, { Y: 9, Msg: $0_msg3 }, { Y: $b, Msg: $0_msg4 }, { Y: $c, Msg: $0_msg5 }, { Y: $d, Msg: $0_msg6 }, { Y: $e, Msg: $0_msg7 }, { Y: $f, Msg: $0_msg8 }, { Y: $12, Msg: $0_msg9 }, { Y: $13, Msg: $0_msg10 }, { Y: $17, Msg: $0_msg11 } }
void __start()
void main()
unsigned int main::$0
unsigned int main::$1
bool main::$2
char **main::$3
char **main::$4
bool main::$5
char main::i
char main::i#0
char main::i#1
char main::i#2
char main::i#3
char main::i#4
char main::i#5
char main::i#6
char *main::msg
char *main::msg#0
char *main::msg#1
char *main::msg#2
char *main::msg#3
char *main::screen
char *main::screen#0
char *main::screen#1
char *main::screen#2
char *main::screen#3
char *main::screen#4
char *main::screen#5
char *main::screen#6
char *main::screen#7
struct $0 *main::txt
struct $0 *main::txt#0
struct $0 *main::txt#1
struct $0 *main::txt#2
struct $0 *main::txt#3
struct $0 *main::txt#4
struct $0 *main::txt#5
struct $0 *main::txt#6

Adding number conversion cast (unumber) 0 in main::$5 = 0 != *main::msg#2
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant pointer cast (char *) 1024
Simplifying constant integer cast 0
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (char) 0
Successful SSA optimization PassNFinalizeNumberTypeConversions
Alias main::txt#2 = main::txt#4 
Alias main::screen#6 = main::screen#7 
Alias main::i#2 = main::i#5 
Alias main::msg#2 = main::msg#3 
Alias main::screen#3 = main::screen#5 main::screen#4 
Alias main::i#3 = main::i#6 main::i#4 
Alias main::txt#3 = main::txt#6 main::txt#5 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values main::i#3 main::i#2
Identical Phi Values main::txt#3 main::txt#2
Successful SSA optimization Pass2IdenticalPhiElimination
Simple Condition main::$2 [7] if(main::i#2<main::$1) goto main::@2
Simple Condition main::$5 [13] if(0!=*main::msg#2) goto main::@4
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant right-side identified [4] main::$0 = sizeof  Text
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant main::screen#0 = (char *) 1024
Constant main::txt#0 = Text
Constant main::i#0 = 0
Constant main::$0 = sizeof Text
Successful SSA optimization Pass2ConstantIdentification
Consolidated constant strings into $0_msg7
Successful SSA optimization Pass2ConstantStringConsolidation
Converting *(pointer+n) to pointer[n] [10] main::msg#0 = *main::$3  -- main::$4[OFFSET_STRUCT_$0_MSG]
Successful SSA optimization Pass2InlineDerefIdx
Eliminating unused variable main::$3 and assignment [4] main::$3 = main::$4 + OFFSET_STRUCT_$0_MSG
Successful SSA optimization PassNEliminateUnusedVars
Removing unused procedure __start
Removing unused procedure block __start
Removing unused procedure block __start::@1
Removing unused procedure block __start::@return
Successful SSA optimization PassNEliminateEmptyStart
Resolving array sizeof() sizeof Text
Successful SSA optimization PassNSizeOfSimplification
Constant right-side identified [1] main::$1 = main::$0 / SIZEOF_STRUCT_$0
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant main::$1 = main::$0/SIZEOF_STRUCT_$0
Successful SSA optimization Pass2ConstantIdentification
Adding number conversion cast (unumber) $c in 
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast $c
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (char) $c
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inlining Noop Cast [2] main::$4 = (char **)main::txt#2 keeping main::txt#2
Successful SSA optimization Pass2NopCastInlining
Inlining constant with var siblings main::screen#0
Inlining constant with var siblings main::txt#0
Inlining constant with var siblings main::i#0
Constant inlined main::txt#0 = Text
Constant inlined main::screen#0 = (char *) 1024
Constant inlined main::$1 = $c*3/3
Constant inlined main::$0 = $c*3
Constant inlined SIZEOF_STRUCT_$0 = 3
Constant inlined main::i#0 = 0
Constant inlined OFFSET_STRUCT_$0_MSG = 1
Constant inlined $0_msg7 = $0_msg10
Successful SSA optimization Pass2ConstantInlining
Adding NOP phi() at start of main
CALL GRAPH

Created 5 initial phi equivalence classes
Coalesced [5] main::msg#4 = main::msg#0
Coalesced [6] main::screen#9 = main::screen#6
Coalesced [13] main::i#7 = main::i#1
Coalesced [14] main::txt#7 = main::txt#1
Coalesced [15] main::screen#8 = main::screen#2
Coalesced [19] main::msg#5 = main::msg#1
Coalesced [20] main::screen#10 = main::screen#1
Coalesced down to 4 phi equivalence classes
Adding NOP phi() at start of main

FINAL CONTROL FLOW GRAPH

void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@5
  [1] main::screen#6 = phi( main/(char *) 1024, main::@5/main::screen#2 )
  [1] main::txt#2 = phi( main/Text, main::@5/main::txt#1 )
  [1] main::i#2 = phi( main/0, main::@5/main::i#1 )
  [2] if(main::i#2<$c*3/3) goto main::@2
  to:main::@return
main::@return: scope:[main]  from main::@1
  [3] return 
  to:@return
main::@2: scope:[main]  from main::@1
  [4] main::msg#0 = ((char **)main::txt#2)[1]
  to:main::@3
main::@3: scope:[main]  from main::@2 main::@4
  [5] main::screen#3 = phi( main::@2/main::screen#6, main::@4/main::screen#1 )
  [5] main::msg#2 = phi( main::@2/main::msg#0, main::@4/main::msg#1 )
  [6] if(0!=*main::msg#2) goto main::@4
  to:main::@5
main::@5: scope:[main]  from main::@3
  [7] *main::screen#3 = ' '
  [8] main::screen#2 = ++ main::screen#3
  [9] main::i#1 = ++ main::i#2
  [10] main::txt#1 = main::txt#2 + 3
  to:main::@1
main::@4: scope:[main]  from main::@3
  [11] *main::screen#3 = *main::msg#2
  [12] main::screen#1 = ++ main::screen#3
  [13] main::msg#1 = ++ main::msg#2
  to:main::@3


VARIABLE REGISTER WEIGHTS
void main()
char main::i
char main::i#1 // 11.0
char main::i#2 // 3.3000000000000003
char *main::msg
char *main::msg#0 // 22.0
char *main::msg#1 // 202.0
char *main::msg#2 // 103.75
char *main::screen
char *main::screen#1 // 101.0
char *main::screen#2 // 7.333333333333333
char *main::screen#3 // 84.0
char *main::screen#6 // 7.333333333333333
struct $0 *main::txt
struct $0 *main::txt#1 // 22.0
struct $0 *main::txt#2 // 2.0

Initial phi equivalence classes
[ main::i#2 main::i#1 ]
[ main::txt#2 main::txt#1 ]
[ main::msg#2 main::msg#0 main::msg#1 ]
[ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ]
Complete equivalence classes
[ main::i#2 main::i#1 ]
[ main::txt#2 main::txt#1 ]
[ main::msg#2 main::msg#0 main::msg#1 ]
[ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ]
Allocated zp[1]:2 [ main::i#2 main::i#1 ]
Allocated zp[2]:3 [ main::txt#2 main::txt#1 ]
Allocated zp[2]:5 [ main::msg#2 main::msg#0 main::msg#1 ]
Allocated zp[2]:7 [ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ]
REGISTER UPLIFT POTENTIAL REGISTERS
Statement [4] main::msg#0 = ((char **)main::txt#2)[1] [ main::i#2 main::txt#2 main::screen#6 main::msg#0 ] (  [ main::i#2 main::txt#2 main::screen#6 main::msg#0 ] { }  ) always clobbers reg byte a reg byte y 
Removing always clobbered register reg byte a as potential for zp[1]:2 [ main::i#2 main::i#1 ]
Removing always clobbered register reg byte y as potential for zp[1]:2 [ main::i#2 main::i#1 ]
Statement [6] if(0!=*main::msg#2) goto main::@4 [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] (  [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] { }  ) always clobbers reg byte a reg byte y 
Statement [7] *main::screen#3 = ' ' [ main::i#2 main::txt#2 main::screen#3 ] (  [ main::i#2 main::txt#2 main::screen#3 ] { }  ) always clobbers reg byte a reg byte y 
Statement [10] main::txt#1 = main::txt#2 + 3 [ main::i#1 main::txt#1 main::screen#2 ] (  [ main::i#1 main::txt#1 main::screen#2 ] { }  ) always clobbers reg byte a 
Statement [11] *main::screen#3 = *main::msg#2 [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] (  [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] { }  ) always clobbers reg byte a reg byte y 
Statement [4] main::msg#0 = ((char **)main::txt#2)[1] [ main::i#2 main::txt#2 main::screen#6 main::msg#0 ] (  [ main::i#2 main::txt#2 main::screen#6 main::msg#0 ] { }  ) always clobbers reg byte a reg byte y 
Statement [6] if(0!=*main::msg#2) goto main::@4 [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] (  [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] { }  ) always clobbers reg byte a reg byte y 
Statement [7] *main::screen#3 = ' ' [ main::i#2 main::txt#2 main::screen#3 ] (  [ main::i#2 main::txt#2 main::screen#3 ] { }  ) always clobbers reg byte a reg byte y 
Statement [10] main::txt#1 = main::txt#2 + 3 [ main::i#1 main::txt#1 main::screen#2 ] (  [ main::i#1 main::txt#1 main::screen#2 ] { }  ) always clobbers reg byte a 
Statement [11] *main::screen#3 = *main::msg#2 [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] (  [ main::i#2 main::txt#2 main::msg#2 main::screen#3 ] { }  ) always clobbers reg byte a reg byte y 
Potential registers zp[1]:2 [ main::i#2 main::i#1 ] : zp[1]:2 , reg byte x , 
Potential registers zp[2]:3 [ main::txt#2 main::txt#1 ] : zp[2]:3 , 
Potential registers zp[2]:5 [ main::msg#2 main::msg#0 main::msg#1 ] : zp[2]:5 , 
Potential registers zp[2]:7 [ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ] : zp[2]:7 , 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 327.75: zp[2]:5 [ main::msg#2 main::msg#0 main::msg#1 ] 199.67: zp[2]:7 [ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ] 24: zp[2]:3 [ main::txt#2 main::txt#1 ] 14.3: zp[1]:2 [ main::i#2 main::i#1 ] 
Uplift Scope [$0] 
Uplift Scope [] 

Uplifting [main] best 7141 combination zp[2]:5 [ main::msg#2 main::msg#0 main::msg#1 ] zp[2]:7 [ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ] zp[2]:3 [ main::txt#2 main::txt#1 ] reg byte x [ main::i#2 main::i#1 ] 
Uplifting [$0] best 7141 combination 
Uplifting [] best 7141 combination 
Allocated (was zp[2]:3) zp[2]:2 [ main::txt#2 main::txt#1 ]
Allocated (was zp[2]:5) zp[2]:4 [ main::msg#2 main::msg#0 main::msg#1 ]
Allocated (was zp[2]:7) zp[2]:6 [ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ]

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Structs with char* pointer members
// https://gitlab.com/camelot/kickc/-/issues/397
  // Upstart
  // Commodore 64 PRG executable file
.file [name="struct-49.prg", type="prg", segments="Program"]
.segmentdef Program [segments="Basic, Code, Data"]
.segmentdef Basic [start=$0801]
.segmentdef Code [start=$80d]
.segmentdef Data [startAfter="Code"]
.segment Basic
:BasicUpstart(main)
  // Global Constants & labels
.segment Code
  // main
main: {
    .label msg = 4
    .label screen = 6
    .label txt = 2
    // [1] phi from main to main::@1 [phi:main->main::@1]
  __b1_from_main:
    // [1] phi main::screen#6 = (char *) 1024 [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<$400
    sta.z screen
    lda #>$400
    sta.z screen+1
    // [1] phi main::txt#2 = Text [phi:main->main::@1#1] -- pssz1=pssc1 
    lda #<Text
    sta.z txt
    lda #>Text
    sta.z txt+1
    // [1] phi main::i#2 = 0 [phi:main->main::@1#2] -- vbuxx=vbuc1 
    ldx #0
    jmp __b1
    // main::@1
  __b1:
    // [2] if(main::i#2<$c*3/3) goto main::@2 -- vbuxx_lt_vbuc1_then_la1 
    cpx #$c*3/3
    bcc __b2
    jmp __breturn
    // main::@return
  __breturn:
    // [3] return 
    rts
    // main::@2
  __b2:
    // [4] main::msg#0 = ((char **)main::txt#2)[1] -- pbuz1=qbuz2_derefidx_vbuc1 
    ldy #1
    lda (txt),y
    sta.z msg
    iny
    lda (txt),y
    sta.z msg+1
    // [5] phi from main::@2 main::@4 to main::@3 [phi:main::@2/main::@4->main::@3]
  __b3_from___b2:
  __b3_from___b4:
    // [5] phi main::screen#3 = main::screen#6 [phi:main::@2/main::@4->main::@3#0] -- register_copy 
    // [5] phi main::msg#2 = main::msg#0 [phi:main::@2/main::@4->main::@3#1] -- register_copy 
    jmp __b3
    // main::@3
  __b3:
    // [6] if(0!=*main::msg#2) goto main::@4 -- 0_neq__deref_pbuz1_then_la1 
    ldy #0
    lda (msg),y
    cmp #0
    bne __b4
    jmp __b5
    // main::@5
  __b5:
    // [7] *main::screen#3 = ' ' -- _deref_pbuz1=vbuc1 
    lda #' '
    ldy #0
    sta (screen),y
    // [8] main::screen#2 = ++ main::screen#3 -- pbuz1=_inc_pbuz1 
    inc.z screen
    bne !+
    inc.z screen+1
  !:
    // [9] main::i#1 = ++ main::i#2 -- vbuxx=_inc_vbuxx 
    inx
    // [10] main::txt#1 = main::txt#2 + 3 -- pssz1=pssz1_plus_vbuc1 
    lda #3
    clc
    adc.z txt
    sta.z txt
    bcc !+
    inc.z txt+1
  !:
    // [1] phi from main::@5 to main::@1 [phi:main::@5->main::@1]
  __b1_from___b5:
    // [1] phi main::screen#6 = main::screen#2 [phi:main::@5->main::@1#0] -- register_copy 
    // [1] phi main::txt#2 = main::txt#1 [phi:main::@5->main::@1#1] -- register_copy 
    // [1] phi main::i#2 = main::i#1 [phi:main::@5->main::@1#2] -- register_copy 
    jmp __b1
    // main::@4
  __b4:
    // [11] *main::screen#3 = *main::msg#2 -- _deref_pbuz1=_deref_pbuz2 
    ldy #0
    lda (msg),y
    ldy #0
    sta (screen),y
    // [12] main::screen#1 = ++ main::screen#3 -- pbuz1=_inc_pbuz1 
    inc.z screen
    bne !+
    inc.z screen+1
  !:
    // [13] main::msg#1 = ++ main::msg#2 -- pbuz1=_inc_pbuz1 
    inc.z msg
    bne !+
    inc.z msg+1
  !:
    jmp __b3_from___b4
}
  // File Data
.segment Data
  Text: .byte 2
  .word __0_msg
  .byte 4
  .word __0_msg1
  .byte 5
  .word __0_msg2
  .byte 9
  .word __0_msg3
  .byte $b
  .word __0_msg4
  .byte $c
  .word __0_msg5
  .byte $d
  .word __0_msg6
  .byte $e
  .word __0_msg10
  .byte $f
  .word __0_msg8
  .byte $12
  .word __0_msg9
  .byte $13
  .word __0_msg10
  .byte $17
  .word __0_msg11
  __0_msg: .text "Wolfgang Amadeus Mozart"
  .byte 0
  __0_msg1: .text @"\"Eine kleine Nachtmusik\""
  .byte 0
  __0_msg2: .text "(KV 525)"
  .byte 0
  __0_msg3: .text "Ported to the SID in 1987 by"
  .byte 0
  __0_msg4: .text "Joachim von Bassewitz"
  .byte 0
  __0_msg5: .text "(joachim@von-bassewitz.de)"
  .byte 0
  __0_msg6: .text "and"
  .byte 0
  __0_msg8: .text "(ullrich@von-bassewitz.de)"
  .byte 0
  __0_msg9: .text "C Implementation by"
  .byte 0
  __0_msg10: .text "Ullrich von Bassewitz"
  .byte 0
  __0_msg11: .text "Press any key to quit..."
  .byte 0

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp __b1
Removing instruction jmp __breturn
Removing instruction jmp __b3
Removing instruction jmp __b5
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction ldy #0
Succesful ASM optimization Pass5UnnecesaryLoadElimination
Replacing label __b3_from___b4 with __b3
Removing instruction __b3_from___b2:
Removing instruction __b3_from___b4:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction __b1_from_main:
Removing instruction __breturn:
Removing instruction __b5:
Removing instruction __b1_from___b5:
Succesful ASM optimization Pass5UnusedLabelElimination
Removing instruction ldy #0
Succesful ASM optimization Pass5UnnecesaryLoadElimination

FINAL SYMBOL TABLE
__constant char $0_msg[$18] = "Wolfgang Amadeus Mozart"
__constant char $0_msg1[$19] = ""Eine kleine Nachtmusik""
__constant char $0_msg10[$16] = "Ullrich von Bassewitz"
__constant char $0_msg11[$19] = "Press any key to quit..."
__constant char $0_msg2[9] = "(KV 525)"
__constant char $0_msg3[$1d] = "Ported to the SID in 1987 by"
__constant char $0_msg4[$16] = "Joachim von Bassewitz"
__constant char $0_msg5[$1b] = "(joachim@von-bassewitz.de)"
__constant char $0_msg6[4] = "and"
__constant char $0_msg8[$1b] = "(ullrich@von-bassewitz.de)"
__constant char $0_msg9[$14] = "C Implementation by"
__constant struct $0 Text[] = { { Y: 2, Msg: $0_msg }, { Y: 4, Msg: $0_msg1 }, { Y: 5, Msg: $0_msg2 }, { Y: 9, Msg: $0_msg3 }, { Y: $b, Msg: $0_msg4 }, { Y: $c, Msg: $0_msg5 }, { Y: $d, Msg: $0_msg6 }, { Y: $e, Msg: $0_msg10 }, { Y: $f, Msg: $0_msg8 }, { Y: $12, Msg: $0_msg9 }, { Y: $13, Msg: $0_msg10 }, { Y: $17, Msg: $0_msg11 } }
void main()
char main::i
char main::i#1 // reg byte x 11.0
char main::i#2 // reg byte x 3.3000000000000003
char *main::msg
char *main::msg#0 // msg zp[2]:4 22.0
char *main::msg#1 // msg zp[2]:4 202.0
char *main::msg#2 // msg zp[2]:4 103.75
char *main::screen
char *main::screen#1 // screen zp[2]:6 101.0
char *main::screen#2 // screen zp[2]:6 7.333333333333333
char *main::screen#3 // screen zp[2]:6 84.0
char *main::screen#6 // screen zp[2]:6 7.333333333333333
struct $0 *main::txt
struct $0 *main::txt#1 // txt zp[2]:2 22.0
struct $0 *main::txt#2 // txt zp[2]:2 2.0

reg byte x [ main::i#2 main::i#1 ]
zp[2]:2 [ main::txt#2 main::txt#1 ]
zp[2]:4 [ main::msg#2 main::msg#0 main::msg#1 ]
zp[2]:6 [ main::screen#3 main::screen#6 main::screen#2 main::screen#1 ]


FINAL ASSEMBLER
Score: 6261

  // File Comments
// Structs with char* pointer members
// https://gitlab.com/camelot/kickc/-/issues/397
  // Upstart
  // Commodore 64 PRG executable file
.file [name="struct-49.prg", type="prg", segments="Program"]
.segmentdef Program [segments="Basic, Code, Data"]
.segmentdef Basic [start=$0801]
.segmentdef Code [start=$80d]
.segmentdef Data [startAfter="Code"]
.segment Basic
:BasicUpstart(main)
  // Global Constants & labels
.segment Code
  // main
main: {
    .label msg = 4
    .label screen = 6
    .label txt = 2
    // [1] phi from main to main::@1 [phi:main->main::@1]
    // [1] phi main::screen#6 = (char *) 1024 [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<$400
    sta.z screen
    lda #>$400
    sta.z screen+1
    // [1] phi main::txt#2 = Text [phi:main->main::@1#1] -- pssz1=pssc1 
    lda #<Text
    sta.z txt
    lda #>Text
    sta.z txt+1
    // [1] phi main::i#2 = 0 [phi:main->main::@1#2] -- vbuxx=vbuc1 
    ldx #0
    // main::@1
  __b1:
    // for(char i=0;i<sizeof(Text)/sizeof(TextDesc); i++, txt++)
    // [2] if(main::i#2<$c*3/3) goto main::@2 -- vbuxx_lt_vbuc1_then_la1 
    cpx #$c*3/3
    bcc __b2
    // main::@return
    // }
    // [3] return 
    rts
    // main::@2
  __b2:
    // char* msg = txt->Msg
    // [4] main::msg#0 = ((char **)main::txt#2)[1] -- pbuz1=qbuz2_derefidx_vbuc1 
    ldy #1
    lda (txt),y
    sta.z msg
    iny
    lda (txt),y
    sta.z msg+1
    // [5] phi from main::@2 main::@4 to main::@3 [phi:main::@2/main::@4->main::@3]
    // [5] phi main::screen#3 = main::screen#6 [phi:main::@2/main::@4->main::@3#0] -- register_copy 
    // [5] phi main::msg#2 = main::msg#0 [phi:main::@2/main::@4->main::@3#1] -- register_copy 
    // main::@3
  __b3:
    // for(char* msg = txt->Msg; *msg; msg++)
    // [6] if(0!=*main::msg#2) goto main::@4 -- 0_neq__deref_pbuz1_then_la1 
    ldy #0
    lda (msg),y
    cmp #0
    bne __b4
    // main::@5
    // *(screen++) = ' '
    // [7] *main::screen#3 = ' ' -- _deref_pbuz1=vbuc1 
    lda #' '
    sta (screen),y
    // *(screen++) = ' ';
    // [8] main::screen#2 = ++ main::screen#3 -- pbuz1=_inc_pbuz1 
    inc.z screen
    bne !+
    inc.z screen+1
  !:
    // for(char i=0;i<sizeof(Text)/sizeof(TextDesc); i++, txt++)
    // [9] main::i#1 = ++ main::i#2 -- vbuxx=_inc_vbuxx 
    inx
    // [10] main::txt#1 = main::txt#2 + 3 -- pssz1=pssz1_plus_vbuc1 
    lda #3
    clc
    adc.z txt
    sta.z txt
    bcc !+
    inc.z txt+1
  !:
    // [1] phi from main::@5 to main::@1 [phi:main::@5->main::@1]
    // [1] phi main::screen#6 = main::screen#2 [phi:main::@5->main::@1#0] -- register_copy 
    // [1] phi main::txt#2 = main::txt#1 [phi:main::@5->main::@1#1] -- register_copy 
    // [1] phi main::i#2 = main::i#1 [phi:main::@5->main::@1#2] -- register_copy 
    jmp __b1
    // main::@4
  __b4:
    // *(screen++) = *msg
    // [11] *main::screen#3 = *main::msg#2 -- _deref_pbuz1=_deref_pbuz2 
    ldy #0
    lda (msg),y
    sta (screen),y
    // *(screen++) = *msg;
    // [12] main::screen#1 = ++ main::screen#3 -- pbuz1=_inc_pbuz1 
    inc.z screen
    bne !+
    inc.z screen+1
  !:
    // for(char* msg = txt->Msg; *msg; msg++)
    // [13] main::msg#1 = ++ main::msg#2 -- pbuz1=_inc_pbuz1 
    inc.z msg
    bne !+
    inc.z msg+1
  !:
    jmp __b3
}
  // File Data
.segment Data
  Text: .byte 2
  .word __0_msg
  .byte 4
  .word __0_msg1
  .byte 5
  .word __0_msg2
  .byte 9
  .word __0_msg3
  .byte $b
  .word __0_msg4
  .byte $c
  .word __0_msg5
  .byte $d
  .word __0_msg6
  .byte $e
  .word __0_msg10
  .byte $f
  .word __0_msg8
  .byte $12
  .word __0_msg9
  .byte $13
  .word __0_msg10
  .byte $17
  .word __0_msg11
  __0_msg: .text "Wolfgang Amadeus Mozart"
  .byte 0
  __0_msg1: .text @"\"Eine kleine Nachtmusik\""
  .byte 0
  __0_msg2: .text "(KV 525)"
  .byte 0
  __0_msg3: .text "Ported to the SID in 1987 by"
  .byte 0
  __0_msg4: .text "Joachim von Bassewitz"
  .byte 0
  __0_msg5: .text "(joachim@von-bassewitz.de)"
  .byte 0
  __0_msg6: .text "and"
  .byte 0
  __0_msg8: .text "(ullrich@von-bassewitz.de)"
  .byte 0
  __0_msg9: .text "C Implementation by"
  .byte 0
  __0_msg10: .text "Ullrich von Bassewitz"
  .byte 0
  __0_msg11: .text "Press any key to quit..."
  .byte 0