Identified constant variable (byte*) SCREEN
Culled Empty Block (label) main::@4

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  (byte*) SCREEN#0 ← ((byte*)) (number) $400
  to:@1
main: scope:[main]  from @1
  (byte) main::i#0 ← (number) 0
  to:main::@1
main::@1: scope:[main]  from main main::@2
  (byte) main::i#2 ← phi( main/(byte) main::i#0 main::@2/(byte) main::i#1 )
  (bool~) main::$0 ← (byte) main::i#2 < (number) $32
  (bool~) main::$1 ← ! (bool~) main::$0
  if((bool~) main::$1) goto main::@2
  to:main::@3
main::@2: scope:[main]  from main::@1 main::@3
  (byte) main::i#3 ← phi( main::@1/(byte) main::i#2 main::@3/(byte) main::i#4 )
  (byte) main::i#1 ← ++ (byte) main::i#3
  (bool~) main::$2 ← (byte) main::i#1 < (number) $64
  if((bool~) main::$2) goto main::@1
  to:main::@return
main::@3: scope:[main]  from main::@1
  (byte) main::i#4 ← phi( main::@1/(byte) main::i#2 )
  *((byte*) SCREEN#0) ← (byte) main::i#4
  to:main::@2
main::@return: scope:[main]  from main::@2
  return 
  to:@return
@1: scope:[]  from @begin
  call main 
  to:@2
@2: scope:[]  from @1
  to:@end
@end: scope:[]  from @2

SYMBOL TABLE SSA
(label) @1
(label) @2
(label) @begin
(label) @end
(byte*) SCREEN
(byte*) SCREEN#0
(void()) main()
(bool~) main::$0
(bool~) main::$1
(bool~) main::$2
(label) main::@1
(label) main::@2
(label) main::@3
(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

Adding number conversion cast (unumber) 0 in (byte) main::i#0 ← (number) 0
Adding number conversion cast (unumber) $32 in (bool~) main::$0 ← (byte) main::i#2 < (number) $32
Adding number conversion cast (unumber) $64 in (bool~) main::$2 ← (byte) main::i#1 < (number) $64
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte*) SCREEN#0 ← (byte*)(number) $400
Inlining cast (byte) main::i#0 ← (unumber)(number) 0
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 0
Simplifying constant integer cast $32
Simplifying constant integer cast $64
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) $32
Finalized unsigned number type (byte) $64
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inversing boolean not [4] (bool~) main::$1 ← (byte) main::i#2 >= (byte) $32 from [3] (bool~) main::$0 ← (byte) main::i#2 < (byte) $32
Successful SSA optimization Pass2UnaryNotSimplification
Alias (byte) main::i#2 = (byte) main::i#4 
Successful SSA optimization Pass2AliasElimination
Alias (byte) main::i#2 = (byte) main::i#3 
Successful SSA optimization Pass2AliasElimination
Simple Condition (bool~) main::$1 [5] if((byte) main::i#2>=(byte) $32) goto main::@2
Simple Condition (bool~) main::$2 [9] if((byte) main::i#1<(byte) $64) goto main::@1
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant (const byte*) SCREEN#0 = (byte*) 1024
Constant (const byte) main::i#0 = 0
Successful SSA optimization Pass2ConstantIdentification
Successful SSA optimization Pass2LoopHeadConstantIdentification
Alias (byte) main::i#1 = (byte) main::i#2 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values (byte) main::i#7 (const byte) main::i#0
Successful SSA optimization Pass2IdenticalPhiElimination
Removing PHI-reference to removed block (main::@1_1) in block main::@2
if() condition always false - eliminating [10] if((const byte) main::i#0>=(byte) $32) goto main::@2
Successful SSA optimization Pass2ConstantIfs
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::@1 and main::@2)
Added new block during phi lifting main::@6(between main::@1 and main::@3)
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
Adding NOP phi() at start of main::@1_1
CALL GRAPH
Calls in [] to main:2 

Created 2 initial phi equivalence classes
Coalesced [9] main::i#9 ← main::i#6
Coalesced [15] main::i#10 ← main::i#1
Coalesced (already) [16] main::i#8 ← main::i#1
Coalesced down to 1 phi equivalence classes
Culled Empty Block (label) @2
Culled Empty Block (label) main::@1_1
Culled Empty Block (label) main::@6
Culled Empty Block (label) main::@5
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::@3
main::@3: scope:[main]  from main main::@1
  [5] (byte) main::i#6 ← phi( main::@1/(byte) main::i#1 main/(byte) 0 )
  [6] *((const byte*) SCREEN#0) ← (byte) main::i#6
  to:main::@2
main::@2: scope:[main]  from main::@1 main::@3
  [7] (byte) main::i#5 ← phi( main::@1/(byte) main::i#1 main::@3/(byte) main::i#6 )
  [8] (byte) main::i#1 ← ++ (byte) main::i#5
  [9] if((byte) main::i#1<(byte) $64) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@2
  [10] return 
  to:@return
main::@1: scope:[main]  from main::@2
  [11] if((byte) main::i#1>=(byte) $32) goto main::@2
  to:main::@3


VARIABLE REGISTER WEIGHTS
(byte*) SCREEN
(void()) main()
(byte) main::i
(byte) main::i#1 168.33333333333331
(byte) main::i#5 213.0
(byte) main::i#6 61.5

Initial phi equivalence classes
[ main::i#5 main::i#6 main::i#1 ]
Complete equivalence classes
[ main::i#5 main::i#6 main::i#1 ]
Allocated zp ZP_BYTE:2 [ main::i#5 main::i#6 main::i#1 ]

INITIAL ASM
Target platform is c64basic
  // File Comments
// Minimal if() test
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  // @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::@3 [phi:main->main::@3]
  b3_from_main:
    // [5] phi (byte) main::i#6 = (byte) 0 [phi:main->main::@3#0] -- vbuz1=vbuc1 
    lda #0
    sta.z i
    jmp b3
    // main::@3
  b3:
    // [6] *((const byte*) SCREEN#0) ← (byte) main::i#6 -- _deref_pbuc1=vbuz1 
    lda.z i
    sta SCREEN
    // [7] phi from main::@1 main::@3 to main::@2 [phi:main::@1/main::@3->main::@2]
  b2_from_b1:
  b2_from_b3:
    // [7] phi (byte) main::i#5 = (byte) main::i#1 [phi:main::@1/main::@3->main::@2#0] -- register_copy 
    jmp b2
    // main::@2
  b2:
    // [8] (byte) main::i#1 ← ++ (byte) main::i#5 -- vbuz1=_inc_vbuz1 
    inc.z i
    // [9] if((byte) main::i#1<(byte) $64) goto main::@1 -- vbuz1_lt_vbuc1_then_la1 
    lda.z i
    cmp #$64
    bcc b1
    jmp breturn
    // main::@return
  breturn:
    // [10] return 
    rts
    // main::@1
  b1:
    // [11] if((byte) main::i#1>=(byte) $32) goto main::@2 -- vbuz1_ge_vbuc1_then_la1 
    lda.z i
    cmp #$32
    bcs b2_from_b1
    // [5] phi from main::@1 to main::@3 [phi:main::@1->main::@3]
  b3_from_b1:
    // [5] phi (byte) main::i#6 = (byte) main::i#1 [phi:main::@1->main::@3#0] -- register_copy 
    jmp b3
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Potential registers zp ZP_BYTE:2 [ main::i#5 main::i#6 main::i#1 ] : zp ZP_BYTE:2 , reg byte a , reg byte x , reg byte y , 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 442.83: zp ZP_BYTE:2 [ main::i#5 main::i#6 main::i#1 ] 
Uplift Scope [] 

Uplifting [main] best 1838 combination reg byte x [ main::i#5 main::i#6 main::i#1 ] 
Uplifting [] best 1838 combination 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Minimal if() test
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  // @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::@3 [phi:main->main::@3]
  b3_from_main:
    // [5] phi (byte) main::i#6 = (byte) 0 [phi:main->main::@3#0] -- vbuxx=vbuc1 
    ldx #0
    jmp b3
    // main::@3
  b3:
    // [6] *((const byte*) SCREEN#0) ← (byte) main::i#6 -- _deref_pbuc1=vbuxx 
    stx SCREEN
    // [7] phi from main::@1 main::@3 to main::@2 [phi:main::@1/main::@3->main::@2]
  b2_from_b1:
  b2_from_b3:
    // [7] phi (byte) main::i#5 = (byte) main::i#1 [phi:main::@1/main::@3->main::@2#0] -- register_copy 
    jmp b2
    // main::@2
  b2:
    // [8] (byte) main::i#1 ← ++ (byte) main::i#5 -- vbuxx=_inc_vbuxx 
    inx
    // [9] if((byte) main::i#1<(byte) $64) goto main::@1 -- vbuxx_lt_vbuc1_then_la1 
    cpx #$64
    bcc b1
    jmp breturn
    // main::@return
  breturn:
    // [10] return 
    rts
    // main::@1
  b1:
    // [11] if((byte) main::i#1>=(byte) $32) goto main::@2 -- vbuxx_ge_vbuc1_then_la1 
    cpx #$32
    bcs b2_from_b1
    // [5] phi from main::@1 to main::@3 [phi:main::@1->main::@3]
  b3_from_b1:
    // [5] phi (byte) main::i#6 = (byte) main::i#1 [phi:main::@1->main::@3#0] -- register_copy 
    jmp b3
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp b1
Removing instruction jmp bend
Removing instruction jmp b3
Removing instruction jmp b2
Removing instruction jmp breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing label b2_from_b1 with b2
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction main_from_b1:
Removing instruction bend_from_b1:
Removing instruction b2_from_b1:
Removing instruction b2_from_b3:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction b3_from_main:
Removing instruction breturn:
Removing instruction b3_from_b1:
Succesful ASM optimization Pass5UnusedLabelElimination
Updating BasicUpstart to call main directly
Removing instruction jsr main
Succesful ASM optimization Pass5SkipBegin
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
(void()) main()
(label) main::@1
(label) main::@2
(label) main::@3
(label) main::@return
(byte) main::i
(byte) main::i#1 reg byte x 168.33333333333331
(byte) main::i#5 reg byte x 213.0
(byte) main::i#6 reg byte x 61.5

reg byte x [ main::i#5 main::i#6 main::i#1 ]


FINAL ASSEMBLER
Score: 1196

  // File Comments
// Minimal if() test
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  // @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::@3 [phi:main->main::@3]
    // [5] phi (byte) main::i#6 = (byte) 0 [phi:main->main::@3#0] -- vbuxx=vbuc1 
    ldx #0
    // main::@3
  b3:
    // *SCREEN = i
    // [6] *((const byte*) SCREEN#0) ← (byte) main::i#6 -- _deref_pbuc1=vbuxx 
    stx SCREEN
    // [7] phi from main::@1 main::@3 to main::@2 [phi:main::@1/main::@3->main::@2]
    // [7] phi (byte) main::i#5 = (byte) main::i#1 [phi:main::@1/main::@3->main::@2#0] -- register_copy 
    // main::@2
  b2:
    // while(++i<100)
    // [8] (byte) main::i#1 ← ++ (byte) main::i#5 -- vbuxx=_inc_vbuxx 
    inx
    // [9] if((byte) main::i#1<(byte) $64) goto main::@1 -- vbuxx_lt_vbuc1_then_la1 
    cpx #$64
    bcc b1
    // main::@return
    // }
    // [10] return 
    rts
    // main::@1
  b1:
    // if(i<50)
    // [11] if((byte) main::i#1>=(byte) $32) goto main::@2 -- vbuxx_ge_vbuc1_then_la1 
    cpx #$32
    bcs b2
    // [5] phi from main::@1 to main::@3 [phi:main::@1->main::@3]
    // [5] phi (byte) main::i#6 = (byte) main::i#1 [phi:main::@1->main::@3#0] -- register_copy 
    jmp b3
}
  // File Data

