Identified constant variable (byte*) SCREEN
Identified constant variable (byte*) SCREEN2
Culled Empty Block (label) main::@2
Culled Empty Block (label) @1
Culled Empty Block (label) sum::@1
Culled Empty Block (label) @2
Culled Empty Block (label) sum2::@1

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  (byte*) SCREEN#0 ← ((byte*)) (number) $400
  (byte*) SCREEN2#0 ← ((byte*)) (number) $400+(number) $28
  to:@3
main: scope:[main]  from @3
  (byte) main::i#0 ← (byte) 0
  to:main::@1
main::@1: scope:[main]  from main main::@4
  (byte) main::i#2 ← phi( main/(byte) main::i#0 main::@4/(byte) main::i#1 )
  (number~) main::$0 ← (byte) main::i#2 + (number) 1
  (number~) main::$1 ← (byte) main::i#2 + (number) 2
  (byte) sum::a#0 ← (byte) main::i#2
  (byte) sum::b#0 ← (number~) main::$0
  (byte) sum::c#0 ← (number~) main::$1
  call sum 
  (byte) sum::return#0 ← (byte) sum::return#2
  to:main::@3
main::@3: scope:[main]  from main::@1
  (byte) main::i#3 ← phi( main::@1/(byte) main::i#2 )
  (byte) sum::return#3 ← phi( main::@1/(byte) sum::return#0 )
  (byte~) main::$2 ← (byte) sum::return#3
  *((byte*) SCREEN#0 + (byte) main::i#3) ← (byte~) main::$2
  (number~) main::$3 ← (byte) main::i#3 + (number) 1
  (number~) main::$4 ← (byte) main::i#3 + (number) 2
  (byte) sum2::a#0 ← (byte) main::i#3
  (byte) sum2::b#0 ← (number~) main::$3
  (byte) sum2::c#0 ← (number~) main::$4
  call sum2 
  (byte) sum2::return#0 ← (byte) sum2::return#2
  to:main::@4
main::@4: scope:[main]  from main::@3
  (byte) main::i#4 ← phi( main::@3/(byte) main::i#3 )
  (byte) sum2::return#3 ← phi( main::@3/(byte) sum2::return#0 )
  (byte~) main::$5 ← (byte) sum2::return#3
  *((byte*) SCREEN2#0 + (byte) main::i#4) ← (byte~) main::$5
  (byte) main::i#1 ← (byte) main::i#4 + rangenext(0,$a)
  (bool~) main::$6 ← (byte) main::i#1 != rangelast(0,$a)
  if((bool~) main::$6) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@4
  return 
  to:@return
sum: scope:[sum]  from main::@1
  (byte) sum::c#1 ← phi( main::@1/(byte) sum::c#0 )
  (byte) sum::b#1 ← phi( main::@1/(byte) sum::b#0 )
  (byte) sum::a#1 ← phi( main::@1/(byte) sum::a#0 )
  (byte~) sum::$0 ← (byte) sum::a#1 + (byte) sum::b#1
  (byte~) sum::$1 ← (byte~) sum::$0 + (byte) sum::c#1
  (byte) sum::return#1 ← (byte~) sum::$1
  to:sum::@return
sum::@return: scope:[sum]  from sum
  (byte) sum::return#4 ← phi( sum/(byte) sum::return#1 )
  (byte) sum::return#2 ← (byte) sum::return#4
  return 
  to:@return
sum2: scope:[sum2]  from main::@3
  (byte) sum2::c#1 ← phi( main::@3/(byte) sum2::c#0 )
  (byte) sum2::b#1 ← phi( main::@3/(byte) sum2::b#0 )
  (byte) sum2::a#1 ← phi( main::@3/(byte) sum2::a#0 )
  (byte~) sum2::$0 ← (byte) sum2::a#1 + (byte) sum2::b#1
  (byte~) sum2::$1 ← (byte~) sum2::$0 + (byte) sum2::c#1
  (byte) sum2::return#1 ← (byte~) sum2::$1
  to:sum2::@return
sum2::@return: scope:[sum2]  from sum2
  (byte) sum2::return#4 ← phi( sum2/(byte) sum2::return#1 )
  (byte) sum2::return#2 ← (byte) sum2::return#4
  return 
  to:@return
@3: scope:[]  from @begin
  call main 
  to:@4
@4: scope:[]  from @3
  to:@end
@end: scope:[]  from @4

SYMBOL TABLE SSA
(label) @3
(label) @4
(label) @begin
(label) @end
(byte*) SCREEN
(byte*) SCREEN#0
(byte*) SCREEN2
(byte*) SCREEN2#0
(void()) main()
(number~) main::$0
(number~) main::$1
(byte~) main::$2
(number~) main::$3
(number~) main::$4
(byte~) main::$5
(bool~) main::$6
(label) main::@1
(label) main::@3
(label) main::@4
(label) main::@return
(byte) main::i
(byte) main::i#0
(byte) main::i#1
(byte) main::i#2
(byte) main::i#3
(byte) main::i#4
(byte()) sum((byte) sum::a , (byte) sum::b , (byte) sum::c)
(byte~) sum::$0
(byte~) sum::$1
(label) sum::@return
(byte) sum::a
(byte) sum::a#0
(byte) sum::a#1
(byte) sum::b
(byte) sum::b#0
(byte) sum::b#1
(byte) sum::c
(byte) sum::c#0
(byte) sum::c#1
(byte) sum::return
(byte) sum::return#0
(byte) sum::return#1
(byte) sum::return#2
(byte) sum::return#3
(byte) sum::return#4
(byte()) sum2((byte) sum2::a , (byte) sum2::b , (byte) sum2::c)
(byte~) sum2::$0
(byte~) sum2::$1
(label) sum2::@return
(byte) sum2::a
(byte) sum2::a#0
(byte) sum2::a#1
(byte) sum2::b
(byte) sum2::b#0
(byte) sum2::b#1
(byte) sum2::c
(byte) sum2::c#0
(byte) sum2::c#1
(byte) sum2::return
(byte) sum2::return#0
(byte) sum2::return#1
(byte) sum2::return#2
(byte) sum2::return#3
(byte) sum2::return#4

Adding number conversion cast (unumber) 1 in (number~) main::$0 ← (byte) main::i#2 + (number) 1
Adding number conversion cast (unumber) main::$0 in (number~) main::$0 ← (byte) main::i#2 + (unumber)(number) 1
Adding number conversion cast (unumber) 2 in (number~) main::$1 ← (byte) main::i#2 + (number) 2
Adding number conversion cast (unumber) main::$1 in (number~) main::$1 ← (byte) main::i#2 + (unumber)(number) 2
Adding number conversion cast (unumber) 1 in (number~) main::$3 ← (byte) main::i#3 + (number) 1
Adding number conversion cast (unumber) main::$3 in (number~) main::$3 ← (byte) main::i#3 + (unumber)(number) 1
Adding number conversion cast (unumber) 2 in (number~) main::$4 ← (byte) main::i#3 + (number) 2
Adding number conversion cast (unumber) main::$4 in (number~) main::$4 ← (byte) main::i#3 + (unumber)(number) 2
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte*) SCREEN#0 ← (byte*)(number) $400
Inlining cast (byte*) SCREEN2#0 ← (byte*)(number) $400+(number) $28
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 1
Simplifying constant integer cast 2
Simplifying constant integer cast 1
Simplifying constant integer cast 2
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 1
Finalized unsigned number type (byte) 2
Finalized unsigned number type (byte) 1
Finalized unsigned number type (byte) 2
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inferred type updated to byte in (unumber~) main::$0 ← (byte) main::i#2 + (byte) 1
Inferred type updated to byte in (unumber~) main::$1 ← (byte) main::i#2 + (byte) 2
Inferred type updated to byte in (unumber~) main::$3 ← (byte) main::i#3 + (byte) 1
Inferred type updated to byte in (unumber~) main::$4 ← (byte) main::i#3 + (byte) 2
Alias (byte) sum::b#0 = (byte~) main::$0 
Alias (byte) sum::c#0 = (byte~) main::$1 
Alias (byte) sum::return#0 = (byte) sum::return#3 
Alias (byte) main::i#2 = (byte) main::i#3 (byte) main::i#4 
Alias (byte) sum2::b#0 = (byte~) main::$3 
Alias (byte) sum2::c#0 = (byte~) main::$4 
Alias (byte) sum2::return#0 = (byte) sum2::return#3 
Alias (byte) sum::return#1 = (byte~) sum::$1 (byte) sum::return#4 (byte) sum::return#2 
Alias (byte) sum2::return#1 = (byte~) sum2::$1 (byte) sum2::return#4 (byte) sum2::return#2 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values (byte) sum::a#1 (byte) sum::a#0
Identical Phi Values (byte) sum::b#1 (byte) sum::b#0
Identical Phi Values (byte) sum::c#1 (byte) sum::c#0
Identical Phi Values (byte) sum2::a#1 (byte) sum2::a#0
Identical Phi Values (byte) sum2::b#1 (byte) sum2::b#0
Identical Phi Values (byte) sum2::c#1 (byte) sum2::c#0
Successful SSA optimization Pass2IdenticalPhiElimination
Simple Condition (bool~) main::$6 [26] if((byte) main::i#1!=rangelast(0,$a)) goto main::@1
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant right-side identified [1] (byte*) SCREEN2#0 ← (byte*)(number) $400+(number) $28
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant (const byte*) SCREEN#0 = (byte*) 1024
Constant (const byte*) SCREEN2#0 = (byte*)$400+$28
Constant (const byte) main::i#0 = 0
Successful SSA optimization Pass2ConstantIdentification
Resolved ranged next value [24] main::i#1 ← ++ main::i#2 to ++
Resolved ranged comparison value [26] if(main::i#1!=rangelast(0,$a)) goto main::@1 to (number) $b
Adding number conversion cast (unumber) $b in if((byte) main::i#1!=(number) $b) goto main::@1
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast $b
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) $b
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inlining constant with var siblings (const byte) main::i#0
Constant inlined main::i#0 = (byte) 0
Successful SSA optimization Pass2ConstantInlining
Added new block during phi lifting main::@5(between main::@4 and main::@1)
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @3
Adding NOP phi() at start of @4
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
CALL GRAPH
Calls in [] to main:2 
Calls in [main] to sum:10 sum2:17 

Created 1 initial phi equivalence classes
Coalesced [24] main::i#5 ← main::i#1
Coalesced down to 1 phi equivalence classes
Culled Empty Block (label) @4
Culled Empty Block (label) main::@5
Renumbering block @3 to @1
Renumbering block main::@3 to main::@2
Renumbering block main::@4 to main::@3
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

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()
main: scope:[main]  from @1
  [4] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@3
  [5] (byte) main::i#2 ← phi( main/(byte) 0 main::@3/(byte) main::i#1 )
  [6] (byte) sum::b#0 ← (byte) main::i#2 + (byte) 1
  [7] (byte) sum::c#0 ← (byte) main::i#2 + (byte) 2
  [8] (byte) sum::a#0 ← (byte) main::i#2
  [9] call sum 
  [10] (byte) sum::return#0 ← (byte) sum::return#1
  to:main::@2
main::@2: scope:[main]  from main::@1
  [11] (byte~) main::$2 ← (byte) sum::return#0
  [12] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte~) main::$2
  [13] (byte) sum2::b#0 ← (byte) main::i#2 + (byte) 1
  [14] (byte) sum2::c#0 ← (byte) main::i#2 + (byte) 2
  [15] (byte) sum2::a#0 ← (byte) main::i#2
  [16] call sum2 
  [17] (byte) sum2::return#0 ← (byte) sum2::return#1
  to:main::@3
main::@3: scope:[main]  from main::@2
  [18] (byte~) main::$5 ← (byte) sum2::return#0
  [19] *((const byte*) SCREEN2#0 + (byte) main::i#2) ← (byte~) main::$5
  [20] (byte) main::i#1 ← ++ (byte) main::i#2
  [21] if((byte) main::i#1!=(byte) $b) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@3
  [22] return 
  to:@return
sum2: scope:[sum2]  from main::@2
  [23] (byte~) sum2::$0 ← (byte) sum2::a#0 + (byte) sum2::b#0
  [24] (byte) sum2::return#1 ← (byte~) sum2::$0 + (byte) sum2::c#0
  to:sum2::@return
sum2::@return: scope:[sum2]  from sum2
  [25] return 
  to:@return
sum: scope:[sum]  from main::@1
  [26] (byte~) sum::$0 ← (byte) sum::a#0 + (byte) sum::b#0
  [27] (byte) sum::return#1 ← (byte~) sum::$0 + (byte) sum::c#0
  to:sum::@return
sum::@return: scope:[sum]  from sum
  [28] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(byte*) SCREEN
(byte*) SCREEN2
(void()) main()
(byte~) main::$2 22.0
(byte~) main::$5 22.0
(byte) main::i
(byte) main::i#1 16.5
(byte) main::i#2 7.333333333333333
(byte()) sum((byte) sum::a , (byte) sum::b , (byte) sum::c)
(byte~) sum::$0 4.0
(byte) sum::a
(byte) sum::a#0 13.0
(byte) sum::b
(byte) sum::b#0 4.333333333333333
(byte) sum::c
(byte) sum::c#0 4.333333333333333
(byte) sum::return
(byte) sum::return#0 22.0
(byte) sum::return#1 4.333333333333333
(byte()) sum2((byte) sum2::a , (byte) sum2::b , (byte) sum2::c)
(byte~) sum2::$0 4.0
(byte) sum2::a
(byte) sum2::a#0 13.0
(byte) sum2::b
(byte) sum2::b#0 4.333333333333333
(byte) sum2::c
(byte) sum2::c#0 4.333333333333333
(byte) sum2::return
(byte) sum2::return#0 22.0
(byte) sum2::return#1 4.333333333333333

Initial phi equivalence classes
[ main::i#2 main::i#1 ]
Added variable sum::b#0 to zero page equivalence class [ sum::b#0 ]
Added variable sum::c#0 to zero page equivalence class [ sum::c#0 ]
Added variable sum::a#0 to zero page equivalence class [ sum::a#0 ]
Added variable sum::return#0 to zero page equivalence class [ sum::return#0 ]
Added variable main::$2 to zero page equivalence class [ main::$2 ]
Added variable sum2::b#0 to zero page equivalence class [ sum2::b#0 ]
Added variable sum2::c#0 to zero page equivalence class [ sum2::c#0 ]
Added variable sum2::a#0 to zero page equivalence class [ sum2::a#0 ]
Added variable sum2::return#0 to zero page equivalence class [ sum2::return#0 ]
Added variable main::$5 to zero page equivalence class [ main::$5 ]
Added variable sum2::$0 to zero page equivalence class [ sum2::$0 ]
Added variable sum2::return#1 to zero page equivalence class [ sum2::return#1 ]
Added variable sum::$0 to zero page equivalence class [ sum::$0 ]
Added variable sum::return#1 to zero page equivalence class [ sum::return#1 ]
Complete equivalence classes
[ main::i#2 main::i#1 ]
[ sum::b#0 ]
[ sum::c#0 ]
[ sum::a#0 ]
[ sum::return#0 ]
[ main::$2 ]
[ sum2::b#0 ]
[ sum2::c#0 ]
[ sum2::a#0 ]
[ sum2::return#0 ]
[ main::$5 ]
[ sum2::$0 ]
[ sum2::return#1 ]
[ sum::$0 ]
[ sum::return#1 ]
Allocated zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Allocated zp ZP_BYTE:3 [ sum::b#0 ]
Allocated zp ZP_BYTE:4 [ sum::c#0 ]
Allocated zp ZP_BYTE:5 [ sum::a#0 ]
Allocated zp ZP_BYTE:6 [ sum::return#0 ]
Allocated zp ZP_BYTE:7 [ main::$2 ]
Allocated zp ZP_BYTE:8 [ sum2::b#0 ]
Allocated zp ZP_BYTE:9 [ sum2::c#0 ]
Allocated zp ZP_BYTE:10 [ sum2::a#0 ]
Allocated zp ZP_BYTE:11 [ sum2::return#0 ]
Allocated zp ZP_BYTE:12 [ main::$5 ]
Allocated zp ZP_BYTE:13 [ sum2::$0 ]
Allocated zp ZP_BYTE:14 [ sum2::return#1 ]
Allocated zp ZP_BYTE:15 [ sum::$0 ]
Allocated zp ZP_BYTE:16 [ sum::return#1 ]

INITIAL ASM
Target platform is c64basic
  // File Comments
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .label SCREEN2 = $400+$28
  // @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 _2 = 7
    .label _5 = $c
    .label i = 2
    // [5] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
    // [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1 
    lda #0
    sta.z i
    jmp b1
    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
  b1_from_b3:
    // [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@3->main::@1#0] -- register_copy 
    jmp b1
    // main::@1
  b1:
    // [6] (byte) sum::b#0 ← (byte) main::i#2 + (byte) 1 -- vbuz1=vbuz2_plus_1 
    ldy.z i
    iny
    sty.z sum.b
    // [7] (byte) sum::c#0 ← (byte) main::i#2 + (byte) 2 -- vbuz1=vbuz2_plus_2 
    lda.z i
    clc
    adc #2
    sta.z sum.c
    // [8] (byte) sum::a#0 ← (byte) main::i#2 -- vbuz1=vbuz2 
    lda.z i
    sta.z sum.a
    // [9] call sum 
    jsr sum
    // [10] (byte) sum::return#0 ← (byte) sum::return#1 -- vbuz1=vbuz2 
    lda.z sum.return_1
    sta.z sum.return
    jmp b2
    // main::@2
  b2:
    // [11] (byte~) main::$2 ← (byte) sum::return#0 -- vbuz1=vbuz2 
    lda.z sum.return
    sta.z _2
    // [12] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte~) main::$2 -- pbuc1_derefidx_vbuz1=vbuz2 
    lda.z _2
    ldy.z i
    sta SCREEN,y
    // [13] (byte) sum2::b#0 ← (byte) main::i#2 + (byte) 1 -- vbuz1=vbuz2_plus_1 
    ldy.z i
    iny
    sty.z sum2.b
    // [14] (byte) sum2::c#0 ← (byte) main::i#2 + (byte) 2 -- vbuz1=vbuz2_plus_2 
    lda.z i
    clc
    adc #2
    sta.z sum2.c
    // [15] (byte) sum2::a#0 ← (byte) main::i#2 -- vbuz1=vbuz2 
    lda.z i
    sta.z sum2.a
    // [16] call sum2 
    jsr sum2
    // [17] (byte) sum2::return#0 ← (byte) sum2::return#1 -- vbuz1=vbuz2 
    lda.z sum2.return_1
    sta.z sum2.return
    jmp b3
    // main::@3
  b3:
    // [18] (byte~) main::$5 ← (byte) sum2::return#0 -- vbuz1=vbuz2 
    lda.z sum2.return
    sta.z _5
    // [19] *((const byte*) SCREEN2#0 + (byte) main::i#2) ← (byte~) main::$5 -- pbuc1_derefidx_vbuz1=vbuz2 
    lda.z _5
    ldy.z i
    sta SCREEN2,y
    // [20] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuz1=_inc_vbuz1 
    inc.z i
    // [21] if((byte) main::i#1!=(byte) $b) goto main::@1 -- vbuz1_neq_vbuc1_then_la1 
    lda #$b
    cmp.z i
    bne b1_from_b3
    jmp breturn
    // main::@return
  breturn:
    // [22] return 
    rts
}
  // sum2
// sum2(byte zeropage($a) a, byte zeropage(8) b, byte zeropage(9) c)
sum2: {
    .label _0 = $d
    .label a = $a
    .label b = 8
    .label c = 9
    .label return = $b
    .label return_1 = $e
    // [23] (byte~) sum2::$0 ← (byte) sum2::a#0 + (byte) sum2::b#0 -- vbuz1=vbuz2_plus_vbuz3 
    lda.z a
    clc
    adc.z b
    sta.z _0
    // [24] (byte) sum2::return#1 ← (byte~) sum2::$0 + (byte) sum2::c#0 -- vbuz1=vbuz2_plus_vbuz3 
    lda.z _0
    clc
    adc.z c
    sta.z return_1
    jmp breturn
    // sum2::@return
  breturn:
    // [25] return 
    rts
}
  // sum
// sum(byte zeropage(5) a, byte zeropage(3) b, byte zeropage(4) c)
sum: {
    .label _0 = $f
    .label a = 5
    .label b = 3
    .label c = 4
    .label return = 6
    .label return_1 = $10
    // [26] (byte~) sum::$0 ← (byte) sum::a#0 + (byte) sum::b#0 -- vbuz1=vbuz2_plus_vbuz3 
    lda.z a
    clc
    adc.z b
    sta.z _0
    // [27] (byte) sum::return#1 ← (byte~) sum::$0 + (byte) sum::c#0 -- vbuz1=vbuz2_plus_vbuz3 
    lda.z _0
    clc
    adc.z c
    sta.z return_1
    jmp breturn
    // sum::@return
  breturn:
    // [28] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [23] (byte~) sum2::$0 ← (byte) sum2::a#0 + (byte) sum2::b#0 [ sum2::c#0 sum2::$0 ] ( main:2::sum2:16 [ main::i#2 sum2::c#0 sum2::$0 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:9 [ sum2::c#0 ]
Statement [24] (byte) sum2::return#1 ← (byte~) sum2::$0 + (byte) sum2::c#0 [ sum2::return#1 ] ( main:2::sum2:16 [ main::i#2 sum2::return#1 ] ) always clobbers reg byte a 
Statement [26] (byte~) sum::$0 ← (byte) sum::a#0 + (byte) sum::b#0 [ sum::c#0 sum::$0 ] ( main:2::sum:9 [ main::i#2 sum::c#0 sum::$0 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:4 [ sum::c#0 ]
Statement [27] (byte) sum::return#1 ← (byte~) sum::$0 + (byte) sum::c#0 [ sum::return#1 ] ( main:2::sum:9 [ main::i#2 sum::return#1 ] ) always clobbers reg byte a 
Statement [23] (byte~) sum2::$0 ← (byte) sum2::a#0 + (byte) sum2::b#0 [ sum2::c#0 sum2::$0 ] ( main:2::sum2:16 [ main::i#2 sum2::c#0 sum2::$0 ] ) always clobbers reg byte a 
Statement [24] (byte) sum2::return#1 ← (byte~) sum2::$0 + (byte) sum2::c#0 [ sum2::return#1 ] ( main:2::sum2:16 [ main::i#2 sum2::return#1 ] ) always clobbers reg byte a 
Statement [26] (byte~) sum::$0 ← (byte) sum::a#0 + (byte) sum::b#0 [ sum::c#0 sum::$0 ] ( main:2::sum:9 [ main::i#2 sum::c#0 sum::$0 ] ) always clobbers reg byte a 
Statement [27] (byte) sum::return#1 ← (byte~) sum::$0 + (byte) sum::c#0 [ sum::return#1 ] ( main:2::sum:9 [ main::i#2 sum::return#1 ] ) always clobbers reg byte a 
Potential registers zp ZP_BYTE:2 [ main::i#2 main::i#1 ] : zp ZP_BYTE:2 , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:3 [ sum::b#0 ] : zp ZP_BYTE:3 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:4 [ sum::c#0 ] : zp ZP_BYTE:4 , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:5 [ sum::a#0 ] : zp ZP_BYTE:5 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:6 [ sum::return#0 ] : zp ZP_BYTE:6 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:7 [ main::$2 ] : zp ZP_BYTE:7 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:8 [ sum2::b#0 ] : zp ZP_BYTE:8 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:9 [ sum2::c#0 ] : zp ZP_BYTE:9 , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:10 [ sum2::a#0 ] : zp ZP_BYTE:10 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:11 [ sum2::return#0 ] : zp ZP_BYTE:11 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:12 [ main::$5 ] : zp ZP_BYTE:12 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:13 [ sum2::$0 ] : zp ZP_BYTE:13 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:14 [ sum2::return#1 ] : zp ZP_BYTE:14 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:15 [ sum::$0 ] : zp ZP_BYTE:15 , reg byte a , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:16 [ sum::return#1 ] : zp ZP_BYTE:16 , reg byte a , reg byte x , reg byte y , 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 23.83: zp ZP_BYTE:2 [ main::i#2 main::i#1 ] 22: zp ZP_BYTE:7 [ main::$2 ] 22: zp ZP_BYTE:12 [ main::$5 ] 
Uplift Scope [sum] 22: zp ZP_BYTE:6 [ sum::return#0 ] 13: zp ZP_BYTE:5 [ sum::a#0 ] 4.33: zp ZP_BYTE:3 [ sum::b#0 ] 4.33: zp ZP_BYTE:4 [ sum::c#0 ] 4.33: zp ZP_BYTE:16 [ sum::return#1 ] 4: zp ZP_BYTE:15 [ sum::$0 ] 
Uplift Scope [sum2] 22: zp ZP_BYTE:11 [ sum2::return#0 ] 13: zp ZP_BYTE:10 [ sum2::a#0 ] 4.33: zp ZP_BYTE:8 [ sum2::b#0 ] 4.33: zp ZP_BYTE:9 [ sum2::c#0 ] 4.33: zp ZP_BYTE:14 [ sum2::return#1 ] 4: zp ZP_BYTE:13 [ sum2::$0 ] 
Uplift Scope [] 

Uplifting [main] best 1345 combination zp ZP_BYTE:2 [ main::i#2 main::i#1 ] reg byte a [ main::$2 ] reg byte a [ main::$5 ] 
Uplifting [sum] best 1214 combination reg byte a [ sum::return#0 ] reg byte y [ sum::a#0 ] reg byte a [ sum::b#0 ] reg byte x [ sum::c#0 ] zp ZP_BYTE:16 [ sum::return#1 ] zp ZP_BYTE:15 [ sum::$0 ] 
Limited combination testing to 100 combinations of 3072 possible.
Uplifting [sum2] best 1083 combination reg byte a [ sum2::return#0 ] reg byte y [ sum2::a#0 ] reg byte a [ sum2::b#0 ] reg byte x [ sum2::c#0 ] zp ZP_BYTE:14 [ sum2::return#1 ] zp ZP_BYTE:13 [ sum2::$0 ] 
Limited combination testing to 100 combinations of 3072 possible.
Uplifting [] best 1083 combination 
Attempting to uplift remaining variables inzp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Uplifting [main] best 1083 combination zp ZP_BYTE:2 [ main::i#2 main::i#1 ] 
Attempting to uplift remaining variables inzp ZP_BYTE:14 [ sum2::return#1 ]
Uplifting [sum2] best 1050 combination reg byte a [ sum2::return#1 ] 
Attempting to uplift remaining variables inzp ZP_BYTE:16 [ sum::return#1 ]
Uplifting [sum] best 1017 combination reg byte a [ sum::return#1 ] 
Attempting to uplift remaining variables inzp ZP_BYTE:13 [ sum2::$0 ]
Uplifting [sum2] best 1015 combination reg byte a [ sum2::$0 ] 
Attempting to uplift remaining variables inzp ZP_BYTE:15 [ sum::$0 ]
Uplifting [sum] best 1013 combination reg byte a [ sum::$0 ] 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .label SCREEN2 = $400+$28
  // @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 i = 2
    // [5] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
    // [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1 
    lda #0
    sta.z i
    jmp b1
    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
  b1_from_b3:
    // [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@3->main::@1#0] -- register_copy 
    jmp b1
    // main::@1
  b1:
    // [6] (byte) sum::b#0 ← (byte) main::i#2 + (byte) 1 -- vbuaa=vbuz1_plus_1 
    lda.z i
    clc
    adc #1
    // [7] (byte) sum::c#0 ← (byte) main::i#2 + (byte) 2 -- vbuxx=vbuz1_plus_2 
    ldx.z i
    inx
    inx
    // [8] (byte) sum::a#0 ← (byte) main::i#2 -- vbuyy=vbuz1 
    ldy.z i
    // [9] call sum 
    jsr sum
    // [10] (byte) sum::return#0 ← (byte) sum::return#1
    jmp b2
    // main::@2
  b2:
    // [11] (byte~) main::$2 ← (byte) sum::return#0
    // [12] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte~) main::$2 -- pbuc1_derefidx_vbuz1=vbuaa 
    ldy.z i
    sta SCREEN,y
    // [13] (byte) sum2::b#0 ← (byte) main::i#2 + (byte) 1 -- vbuaa=vbuz1_plus_1 
    lda.z i
    clc
    adc #1
    // [14] (byte) sum2::c#0 ← (byte) main::i#2 + (byte) 2 -- vbuxx=vbuz1_plus_2 
    ldx.z i
    inx
    inx
    // [15] (byte) sum2::a#0 ← (byte) main::i#2 -- vbuyy=vbuz1 
    ldy.z i
    // [16] call sum2 
    jsr sum2
    // [17] (byte) sum2::return#0 ← (byte) sum2::return#1
    jmp b3
    // main::@3
  b3:
    // [18] (byte~) main::$5 ← (byte) sum2::return#0
    // [19] *((const byte*) SCREEN2#0 + (byte) main::i#2) ← (byte~) main::$5 -- pbuc1_derefidx_vbuz1=vbuaa 
    ldy.z i
    sta SCREEN2,y
    // [20] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuz1=_inc_vbuz1 
    inc.z i
    // [21] if((byte) main::i#1!=(byte) $b) goto main::@1 -- vbuz1_neq_vbuc1_then_la1 
    lda #$b
    cmp.z i
    bne b1_from_b3
    jmp breturn
    // main::@return
  breturn:
    // [22] return 
    rts
}
  // sum2
// sum2(byte register(Y) a, byte register(A) b, byte register(X) c)
sum2: {
    // [23] (byte~) sum2::$0 ← (byte) sum2::a#0 + (byte) sum2::b#0 -- vbuaa=vbuyy_plus_vbuaa 
    sty.z $ff
    clc
    adc.z $ff
    // [24] (byte) sum2::return#1 ← (byte~) sum2::$0 + (byte) sum2::c#0 -- vbuaa=vbuaa_plus_vbuxx 
    stx.z $ff
    clc
    adc.z $ff
    jmp breturn
    // sum2::@return
  breturn:
    // [25] return 
    rts
}
  // sum
// sum(byte register(Y) a, byte register(A) b, byte register(X) c)
sum: {
    // [26] (byte~) sum::$0 ← (byte) sum::a#0 + (byte) sum::b#0 -- vbuaa=vbuyy_plus_vbuaa 
    sty.z $ff
    clc
    adc.z $ff
    // [27] (byte) sum::return#1 ← (byte~) sum::$0 + (byte) sum::c#0 -- vbuaa=vbuaa_plus_vbuxx 
    stx.z $ff
    clc
    adc.z $ff
    jmp breturn
    // sum::@return
  breturn:
    // [28] return 
    rts
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp b1
Removing instruction jmp bend
Removing instruction jmp b1
Removing instruction jmp b2
Removing instruction jmp b3
Removing instruction jmp breturn
Removing instruction jmp breturn
Removing instruction jmp breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing instruction lda.z i with TYA
Removing instruction ldy.z i
Succesful ASM optimization Pass5UnnecesaryLoadElimination
Replacing label b1_from_b3 with b1
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction main_from_b1:
Removing instruction bend_from_b1:
Removing instruction b1_from_b3:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction b1_from_main:
Removing instruction b2:
Removing instruction b3:
Removing instruction breturn:
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 jmp b1
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction bbegin:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(byte*) SCREEN
(const byte*) SCREEN#0 SCREEN = (byte*) 1024
(byte*) SCREEN2
(const byte*) SCREEN2#0 SCREEN2 = (byte*)(number) $400+(number) $28
(void()) main()
(byte~) main::$2 reg byte a 22.0
(byte~) main::$5 reg byte a 22.0
(label) main::@1
(label) main::@2
(label) main::@3
(label) main::@return
(byte) main::i
(byte) main::i#1 i zp ZP_BYTE:2 16.5
(byte) main::i#2 i zp ZP_BYTE:2 7.333333333333333
(byte()) sum((byte) sum::a , (byte) sum::b , (byte) sum::c)
(byte~) sum::$0 reg byte a 4.0
(label) sum::@return
(byte) sum::a
(byte) sum::a#0 reg byte y 13.0
(byte) sum::b
(byte) sum::b#0 reg byte a 4.333333333333333
(byte) sum::c
(byte) sum::c#0 reg byte x 4.333333333333333
(byte) sum::return
(byte) sum::return#0 reg byte a 22.0
(byte) sum::return#1 reg byte a 4.333333333333333
(byte()) sum2((byte) sum2::a , (byte) sum2::b , (byte) sum2::c)
(byte~) sum2::$0 reg byte a 4.0
(label) sum2::@return
(byte) sum2::a
(byte) sum2::a#0 reg byte y 13.0
(byte) sum2::b
(byte) sum2::b#0 reg byte a 4.333333333333333
(byte) sum2::c
(byte) sum2::c#0 reg byte x 4.333333333333333
(byte) sum2::return
(byte) sum2::return#0 reg byte a 22.0
(byte) sum2::return#1 reg byte a 4.333333333333333

zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
reg byte a [ sum::b#0 ]
reg byte x [ sum::c#0 ]
reg byte y [ sum::a#0 ]
reg byte a [ sum::return#0 ]
reg byte a [ main::$2 ]
reg byte a [ sum2::b#0 ]
reg byte x [ sum2::c#0 ]
reg byte y [ sum2::a#0 ]
reg byte a [ sum2::return#0 ]
reg byte a [ main::$5 ]
reg byte a [ sum2::$0 ]
reg byte a [ sum2::return#1 ]
reg byte a [ sum::$0 ]
reg byte a [ sum::return#1 ]


FINAL ASSEMBLER
Score: 805

  // File Comments
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .label SCREEN2 = $400+$28
  // @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 i = 2
    // [5] phi from main to main::@1 [phi:main->main::@1]
    // [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1 
    lda #0
    sta.z i
    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
    // [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@3->main::@1#0] -- register_copy 
    // main::@1
  b1:
    // sum(i,i+1,i+2)
    // [6] (byte) sum::b#0 ← (byte) main::i#2 + (byte) 1 -- vbuaa=vbuz1_plus_1 
    lda.z i
    clc
    adc #1
    // [7] (byte) sum::c#0 ← (byte) main::i#2 + (byte) 2 -- vbuxx=vbuz1_plus_2 
    ldx.z i
    inx
    inx
    // [8] (byte) sum::a#0 ← (byte) main::i#2 -- vbuyy=vbuz1 
    ldy.z i
    // [9] call sum 
    jsr sum
    // [10] (byte) sum::return#0 ← (byte) sum::return#1
    // main::@2
    // [11] (byte~) main::$2 ← (byte) sum::return#0
    // SCREEN[i] = sum(i,i+1,i+2)
    // [12] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte~) main::$2 -- pbuc1_derefidx_vbuz1=vbuaa 
    ldy.z i
    sta SCREEN,y
    // sum2(i,i+1,i+2)
    // [13] (byte) sum2::b#0 ← (byte) main::i#2 + (byte) 1 -- vbuaa=vbuz1_plus_1 
    tya
    clc
    adc #1
    // [14] (byte) sum2::c#0 ← (byte) main::i#2 + (byte) 2 -- vbuxx=vbuz1_plus_2 
    ldx.z i
    inx
    inx
    // [15] (byte) sum2::a#0 ← (byte) main::i#2 -- vbuyy=vbuz1 
    // [16] call sum2 
    jsr sum2
    // [17] (byte) sum2::return#0 ← (byte) sum2::return#1
    // main::@3
    // [18] (byte~) main::$5 ← (byte) sum2::return#0
    // SCREEN2[i] = sum2(i,i+1,i+2)
    // [19] *((const byte*) SCREEN2#0 + (byte) main::i#2) ← (byte~) main::$5 -- pbuc1_derefidx_vbuz1=vbuaa 
    ldy.z i
    sta SCREEN2,y
    // for(byte i : 0..10)
    // [20] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuz1=_inc_vbuz1 
    inc.z i
    // [21] if((byte) main::i#1!=(byte) $b) goto main::@1 -- vbuz1_neq_vbuc1_then_la1 
    lda #$b
    cmp.z i
    bne b1
    // main::@return
    // }
    // [22] return 
    rts
}
  // sum2
// sum2(byte register(Y) a, byte register(A) b, byte register(X) c)
sum2: {
    // a+b
    // [23] (byte~) sum2::$0 ← (byte) sum2::a#0 + (byte) sum2::b#0 -- vbuaa=vbuyy_plus_vbuaa 
    sty.z $ff
    clc
    adc.z $ff
    // a+b+c
    // [24] (byte) sum2::return#1 ← (byte~) sum2::$0 + (byte) sum2::c#0 -- vbuaa=vbuaa_plus_vbuxx 
    stx.z $ff
    clc
    adc.z $ff
    // sum2::@return
    // }
    // [25] return 
    rts
}
  // sum
// sum(byte register(Y) a, byte register(A) b, byte register(X) c)
sum: {
    // a+b
    // [26] (byte~) sum::$0 ← (byte) sum::a#0 + (byte) sum::b#0 -- vbuaa=vbuyy_plus_vbuaa 
    sty.z $ff
    clc
    adc.z $ff
    // a+b+c
    // [27] (byte) sum::return#1 ← (byte~) sum::$0 + (byte) sum::c#0 -- vbuaa=vbuaa_plus_vbuxx 
    stx.z $ff
    clc
    adc.z $ff
    // sum::@return
    // }
    // [28] return 
    rts
}
  // File Data

