Identified constant variable (byte*) RASTER
Identified constant variable (byte*) SCREEN
Identified constant variable (byte) RATE
Culled Empty Block (label) main::@2
Culled Empty Block (label) main::@12
Culled Empty Block (label) main::@3
Culled Empty Block (label) main::@13
Culled Empty Block (label) main::@5
Culled Empty Block (label) main::@7
Culled Empty Block (label) main::@8
Culled Empty Block (label) main::@9
Culled Empty Block (label) main::@11
Culled Empty Block (label) main::@14

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  (byte*) RASTER#0 ← ((byte*)) (number) $d012
  (byte*) SCREEN#0 ← ((byte*)) (number) $400
  (byte) ypos#0 ← (number) 0
  (byte) RATE#0 ← (number) $32
  (byte) counter#0 ← (byte) RATE#0
  to:@1
main: scope:[main]  from @1
  (byte) ypos#10 ← phi( @1/(byte) ypos#9 )
  (byte) counter#11 ← phi( @1/(byte) counter#10 )
  to:main::@1
main::@1: scope:[main]  from main main::@10 main::@6
  (byte) ypos#8 ← phi( main/(byte) ypos#10 main::@10/(byte) ypos#1 main::@6/(byte) ypos#7 )
  (byte) counter#9 ← phi( main/(byte) counter#11 main::@10/(byte) counter#2 main::@6/(byte) counter#1 )
  if(true) goto main::@4
  to:main::@return
main::@4: scope:[main]  from main::@1 main::@4
  (byte) ypos#11 ← phi( main::@1/(byte) ypos#8 main::@4/(byte) ypos#11 )
  (byte) counter#8 ← phi( main::@1/(byte) counter#9 main::@4/(byte) counter#8 )
  (bool~) main::$0 ← *((byte*) RASTER#0) != (number) $ff
  if((bool~) main::$0) goto main::@4
  to:main::@6
main::@6: scope:[main]  from main::@4
  (byte) ypos#7 ← phi( main::@4/(byte) ypos#11 )
  (byte) counter#5 ← phi( main::@4/(byte) counter#8 )
  (byte) counter#1 ← -- (byte) counter#5
  (bool~) main::$1 ← (byte) counter#1 == (number) 0
  (bool~) main::$2 ← ! (bool~) main::$1
  if((bool~) main::$2) goto main::@1
  to:main::@10
main::@10: scope:[main]  from main::@6
  (byte) ypos#4 ← phi( main::@6/(byte) ypos#7 )
  (byte) counter#2 ← (byte) RATE#0
  (byte) ypos#1 ← ++ (byte) ypos#4
  *((byte*) SCREEN#0) ← (byte) ypos#1
  to:main::@1
main::@return: scope:[main]  from main::@1
  (byte) ypos#5 ← phi( main::@1/(byte) ypos#8 )
  (byte) counter#6 ← phi( main::@1/(byte) counter#9 )
  (byte) counter#3 ← (byte) counter#6
  (byte) ypos#2 ← (byte) ypos#5
  return 
  to:@return
@1: scope:[]  from @begin
  (byte) ypos#9 ← phi( @begin/(byte) ypos#0 )
  (byte) counter#10 ← phi( @begin/(byte) counter#0 )
  call main 
  to:@2
@2: scope:[]  from @1
  (byte) ypos#6 ← phi( @1/(byte) ypos#2 )
  (byte) counter#7 ← phi( @1/(byte) counter#3 )
  (byte) counter#4 ← (byte) counter#7
  (byte) ypos#3 ← (byte) ypos#6
  to:@end
@end: scope:[]  from @2

SYMBOL TABLE SSA
(label) @1
(label) @2
(label) @begin
(label) @end
(byte*) RASTER
(byte*) RASTER#0
(byte) RATE
(byte) RATE#0
(byte*) SCREEN
(byte*) SCREEN#0
(byte) counter
(byte) counter#0
(byte) counter#1
(byte) counter#10
(byte) counter#11
(byte) counter#2
(byte) counter#3
(byte) counter#4
(byte) counter#5
(byte) counter#6
(byte) counter#7
(byte) counter#8
(byte) counter#9
(void()) main()
(bool~) main::$0
(bool~) main::$1
(bool~) main::$2
(label) main::@1
(label) main::@10
(label) main::@4
(label) main::@6
(label) main::@return
(byte) ypos
(byte) ypos#0
(byte) ypos#1
(byte) ypos#10
(byte) ypos#11
(byte) ypos#2
(byte) ypos#3
(byte) ypos#4
(byte) ypos#5
(byte) ypos#6
(byte) ypos#7
(byte) ypos#8
(byte) ypos#9

Adding number conversion cast (unumber) 0 in (byte) ypos#0 ← (number) 0
Adding number conversion cast (unumber) $32 in (byte) RATE#0 ← (number) $32
Adding number conversion cast (unumber) $ff in (bool~) main::$0 ← *((byte*) RASTER#0) != (number) $ff
Adding number conversion cast (unumber) 0 in (bool~) main::$1 ← (byte) counter#1 == (number) 0
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte*) RASTER#0 ← (byte*)(number) $d012
Inlining cast (byte*) SCREEN#0 ← (byte*)(number) $400
Inlining cast (byte) ypos#0 ← (unumber)(number) 0
Inlining cast (byte) RATE#0 ← (unumber)(number) $32
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 53266
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 0
Simplifying constant integer cast $32
Simplifying constant integer cast $ff
Simplifying constant integer cast 0
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) $32
Finalized unsigned number type (byte) $ff
Finalized unsigned number type (byte) 0
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inversing boolean not [14] (bool~) main::$2 ← (byte) counter#1 != (byte) 0 from [13] (bool~) main::$1 ← (byte) counter#1 == (byte) 0
Successful SSA optimization Pass2UnaryNotSimplification
Alias (byte) RATE#0 = (byte) counter#0 (byte) counter#10 
Alias (byte) counter#5 = (byte) counter#8 
Alias (byte) ypos#11 = (byte) ypos#7 (byte) ypos#4 
Alias (byte) counter#3 = (byte) counter#6 (byte) counter#9 
Alias (byte) ypos#2 = (byte) ypos#5 (byte) ypos#8 
Alias (byte) ypos#0 = (byte) ypos#9 
Alias (byte) counter#4 = (byte) counter#7 
Alias (byte) ypos#3 = (byte) ypos#6 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values (byte) counter#11 (byte) RATE#0
Identical Phi Values (byte) ypos#10 (byte) ypos#0
Identical Phi Values (byte) counter#5 (byte) counter#3
Identical Phi Values (byte) ypos#11 (byte) ypos#2
Identical Phi Values (byte) counter#4 (byte) counter#3
Identical Phi Values (byte) ypos#3 (byte) ypos#2
Successful SSA optimization Pass2IdenticalPhiElimination
Simple Condition (bool~) main::$0 [10] if(*((byte*) RASTER#0)!=(byte) $ff) goto main::@4
Simple Condition (bool~) main::$2 [15] if((byte) counter#1!=(byte) 0) goto main::@1
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant (const byte*) RASTER#0 = (byte*) 53266
Constant (const byte*) SCREEN#0 = (byte*) 1024
Constant (const byte) ypos#0 = 0
Constant (const byte) RATE#0 = $32
Successful SSA optimization Pass2ConstantIdentification
Constant (const byte) counter#2 = RATE#0
Successful SSA optimization Pass2ConstantIdentification
if() condition always true - replacing block destination [7] if(true) goto main::@4
Successful SSA optimization Pass2ConstantIfs
Removing unused block main::@return
Successful SSA optimization Pass2EliminateUnusedBlocks
Inlining constant with var siblings (const byte) ypos#0
Inlining constant with var siblings (const byte) counter#2
Constant inlined ypos#0 = (byte) 0
Constant inlined counter#2 = (const byte) RATE#0
Successful SSA optimization Pass2ConstantInlining
Added new block during phi lifting main::@15(between main::@6 and main::@1)
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 @end
Adding NOP phi() at start of main
CALL GRAPH
Calls in [] to main:2 

Created 2 initial phi equivalence classes
Coalesced [12] ypos#12 ← ypos#1
Coalesced [13] counter#12 ← counter#1
Coalesced (already) [14] ypos#13 ← ypos#2
Coalesced down to 2 phi equivalence classes
Culled Empty Block (label) @2
Culled Empty Block (label) main::@15
Renumbering block main::@4 to main::@2
Renumbering block main::@6 to main::@3
Renumbering block main::@10 to main::@4
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 main::@4
  [5] (byte) ypos#2 ← phi( main/(byte) 0 main::@4/(byte) ypos#1 main::@3/(byte) ypos#2 )
  [5] (byte) counter#3 ← phi( main/(const byte) RATE#0 main::@4/(const byte) RATE#0 main::@3/(byte) counter#1 )
  to:main::@2
main::@2: scope:[main]  from main::@1 main::@2
  [6] if(*((const byte*) RASTER#0)!=(byte) $ff) goto main::@2
  to:main::@3
main::@3: scope:[main]  from main::@2
  [7] (byte) counter#1 ← -- (byte) counter#3
  [8] if((byte) counter#1!=(byte) 0) goto main::@1
  to:main::@4
main::@4: scope:[main]  from main::@3
  [9] (byte) ypos#1 ← ++ (byte) ypos#2
  [10] *((const byte*) SCREEN#0) ← (byte) ypos#1
  to:main::@1


VARIABLE REGISTER WEIGHTS
(byte*) RASTER
(byte) RATE
(byte*) SCREEN
(byte) counter
(byte) counter#1 151.5
(byte) counter#3 101.0
(void()) main()
(byte) ypos
(byte) ypos#1 16.5
(byte) ypos#2 56.0

Initial phi equivalence classes
[ counter#3 counter#1 ]
[ ypos#2 ypos#1 ]
Complete equivalence classes
[ counter#3 counter#1 ]
[ ypos#2 ypos#1 ]
Allocated zp ZP_BYTE:2 [ counter#3 counter#1 ]
Allocated zp ZP_BYTE:3 [ ypos#2 ypos#1 ]

INITIAL ASM
Target platform is c64basic
  // File Comments
// NullPointerException using current_movedown_rate in the main loop
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label RASTER = $d012
  .label SCREEN = $400
  .const RATE = $32
  .label counter = 2
  .label ypos = 3
  // @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: {
    // [5] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
    // [5] phi (byte) ypos#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1 
    lda #0
    sta.z ypos
    // [5] phi (byte) counter#3 = (const byte) RATE#0 [phi:main->main::@1#1] -- vbuz1=vbuc1 
    lda #RATE
    sta.z counter
    jmp b1
    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
  b1_from_b3:
    // [5] phi (byte) ypos#2 = (byte) ypos#2 [phi:main::@3->main::@1#0] -- register_copy 
    // [5] phi (byte) counter#3 = (byte) counter#1 [phi:main::@3->main::@1#1] -- register_copy 
    jmp b1
    // main::@1
  b1:
    jmp b2
    // main::@2
  b2:
    // [6] if(*((const byte*) RASTER#0)!=(byte) $ff) goto main::@2 -- _deref_pbuc1_neq_vbuc2_then_la1 
    lda #$ff
    cmp RASTER
    bne b2
    jmp b3
    // main::@3
  b3:
    // [7] (byte) counter#1 ← -- (byte) counter#3 -- vbuz1=_dec_vbuz1 
    dec.z counter
    // [8] if((byte) counter#1!=(byte) 0) goto main::@1 -- vbuz1_neq_0_then_la1 
    lda.z counter
    cmp #0
    bne b1_from_b3
    jmp b4
    // main::@4
  b4:
    // [9] (byte) ypos#1 ← ++ (byte) ypos#2 -- vbuz1=_inc_vbuz1 
    inc.z ypos
    // [10] *((const byte*) SCREEN#0) ← (byte) ypos#1 -- _deref_pbuc1=vbuz1 
    lda.z ypos
    sta SCREEN
    // [5] phi from main::@4 to main::@1 [phi:main::@4->main::@1]
  b1_from_b4:
    // [5] phi (byte) ypos#2 = (byte) ypos#1 [phi:main::@4->main::@1#0] -- register_copy 
    // [5] phi (byte) counter#3 = (const byte) RATE#0 [phi:main::@4->main::@1#1] -- vbuz1=vbuc1 
    lda #RATE
    sta.z counter
    jmp b1
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [6] if(*((const byte*) RASTER#0)!=(byte) $ff) goto main::@2 [ counter#3 ypos#2 ] ( main:2 [ counter#3 ypos#2 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ counter#3 counter#1 ]
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:3 [ ypos#2 ypos#1 ]
Statement [6] if(*((const byte*) RASTER#0)!=(byte) $ff) goto main::@2 [ counter#3 ypos#2 ] ( main:2 [ counter#3 ypos#2 ] ) always clobbers reg byte a 
Potential registers zp ZP_BYTE:2 [ counter#3 counter#1 ] : zp ZP_BYTE:2 , reg byte x , reg byte y , 
Potential registers zp ZP_BYTE:3 [ ypos#2 ypos#1 ] : zp ZP_BYTE:3 , reg byte x , reg byte y , 

REGISTER UPLIFT SCOPES
Uplift Scope [] 252.5: zp ZP_BYTE:2 [ counter#3 counter#1 ] 72.5: zp ZP_BYTE:3 [ ypos#2 ypos#1 ] 
Uplift Scope [main] 

Uplifting [] best 14052 combination reg byte y [ counter#3 counter#1 ] reg byte x [ ypos#2 ypos#1 ] 
Uplifting [main] best 14052 combination 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// NullPointerException using current_movedown_rate in the main loop
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label RASTER = $d012
  .label SCREEN = $400
  .const RATE = $32
  // @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: {
    // [5] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
    // [5] phi (byte) ypos#2 = (byte) 0 [phi:main->main::@1#0] -- vbuxx=vbuc1 
    ldx #0
    // [5] phi (byte) counter#3 = (const byte) RATE#0 [phi:main->main::@1#1] -- vbuyy=vbuc1 
    ldy #RATE
    jmp b1
    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
  b1_from_b3:
    // [5] phi (byte) ypos#2 = (byte) ypos#2 [phi:main::@3->main::@1#0] -- register_copy 
    // [5] phi (byte) counter#3 = (byte) counter#1 [phi:main::@3->main::@1#1] -- register_copy 
    jmp b1
    // main::@1
  b1:
    jmp b2
    // main::@2
  b2:
    // [6] if(*((const byte*) RASTER#0)!=(byte) $ff) goto main::@2 -- _deref_pbuc1_neq_vbuc2_then_la1 
    lda #$ff
    cmp RASTER
    bne b2
    jmp b3
    // main::@3
  b3:
    // [7] (byte) counter#1 ← -- (byte) counter#3 -- vbuyy=_dec_vbuyy 
    dey
    // [8] if((byte) counter#1!=(byte) 0) goto main::@1 -- vbuyy_neq_0_then_la1 
    cpy #0
    bne b1_from_b3
    jmp b4
    // main::@4
  b4:
    // [9] (byte) ypos#1 ← ++ (byte) ypos#2 -- vbuxx=_inc_vbuxx 
    inx
    // [10] *((const byte*) SCREEN#0) ← (byte) ypos#1 -- _deref_pbuc1=vbuxx 
    stx SCREEN
    // [5] phi from main::@4 to main::@1 [phi:main::@4->main::@1]
  b1_from_b4:
    // [5] phi (byte) ypos#2 = (byte) ypos#1 [phi:main::@4->main::@1#0] -- register_copy 
    // [5] phi (byte) counter#3 = (const byte) RATE#0 [phi:main::@4->main::@1#1] -- vbuyy=vbuc1 
    ldy #RATE
    jmp b1
}
  // 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 b4
Succesful ASM optimization Pass5NextJumpElimination
Replacing label b1 with b2
Replacing label b1_from_b3 with b2
Replacing label b1 with b2
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction main_from_b1:
Removing instruction bend_from_b1:
Removing instruction b1_from_b3:
Removing instruction b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction b1_from_main:
Removing instruction b3:
Removing instruction b4:
Removing instruction b1_from_b4:
Succesful ASM optimization Pass5UnusedLabelElimination
Updating BasicUpstart to call main directly
Removing instruction jsr main
Succesful ASM optimization Pass5SkipBegin
Removing instruction jmp b2
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction bbegin:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(byte*) RASTER
(const byte*) RASTER#0 RASTER = (byte*) 53266
(byte) RATE
(const byte) RATE#0 RATE = (byte) $32
(byte*) SCREEN
(const byte*) SCREEN#0 SCREEN = (byte*) 1024
(byte) counter
(byte) counter#1 reg byte y 151.5
(byte) counter#3 reg byte y 101.0
(void()) main()
(label) main::@1
(label) main::@2
(label) main::@3
(label) main::@4
(byte) ypos
(byte) ypos#1 reg byte x 16.5
(byte) ypos#2 reg byte x 56.0

reg byte y [ counter#3 counter#1 ]
reg byte x [ ypos#2 ypos#1 ]


FINAL ASSEMBLER
Score: 10110

  // File Comments
// NullPointerException using current_movedown_rate in the main loop
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label RASTER = $d012
  .label SCREEN = $400
  .const RATE = $32
  // @begin
  // [1] phi from @begin to @1 [phi:@begin->@1]
  // @1
  // [2] call main 
  // [4] phi from @1 to main [phi:@1->main]
  // [3] phi from @1 to @end [phi:@1->@end]
  // @end
  // main
main: {
    // [5] phi from main to main::@1 [phi:main->main::@1]
    // [5] phi (byte) ypos#2 = (byte) 0 [phi:main->main::@1#0] -- vbuxx=vbuc1 
    ldx #0
    // [5] phi (byte) counter#3 = (const byte) RATE#0 [phi:main->main::@1#1] -- vbuyy=vbuc1 
    ldy #RATE
    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
    // [5] phi (byte) ypos#2 = (byte) ypos#2 [phi:main::@3->main::@1#0] -- register_copy 
    // [5] phi (byte) counter#3 = (byte) counter#1 [phi:main::@3->main::@1#1] -- register_copy 
    // main::@1
    // main::@2
  b2:
    // while(*RASTER!=$ff)
    // [6] if(*((const byte*) RASTER#0)!=(byte) $ff) goto main::@2 -- _deref_pbuc1_neq_vbuc2_then_la1 
    lda #$ff
    cmp RASTER
    bne b2
    // main::@3
    // if(--counter==0)
    // [7] (byte) counter#1 ← -- (byte) counter#3 -- vbuyy=_dec_vbuyy 
    dey
    // [8] if((byte) counter#1!=(byte) 0) goto main::@1 -- vbuyy_neq_0_then_la1 
    cpy #0
    bne b2
    // main::@4
    // ypos++;
    // [9] (byte) ypos#1 ← ++ (byte) ypos#2 -- vbuxx=_inc_vbuxx 
    inx
    // *SCREEN = ypos
    // [10] *((const byte*) SCREEN#0) ← (byte) ypos#1 -- _deref_pbuc1=vbuxx 
    stx SCREEN
    // [5] phi from main::@4 to main::@1 [phi:main::@4->main::@1]
    // [5] phi (byte) ypos#2 = (byte) ypos#1 [phi:main::@4->main::@1#0] -- register_copy 
    // [5] phi (byte) counter#3 = (const byte) RATE#0 [phi:main::@4->main::@1#1] -- vbuyy=vbuc1 
    ldy #RATE
    jmp b2
}
  // File Data

