kickc/src/test/ref/bool-function.log

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

(void()) main()
main: scope:[main]  from @1
  (byte) main::i#0 ← (byte) 0
  to:main::@1
main::@1: scope:[main]  from main main::@3
  (byte) main::i#2 ← phi( main/(byte) main::i#0 main::@3/(byte) main::i#1 )
  (number~) main::$0 ← (byte) main::i#2 & (number) 1
  (bool~) main::$1 ← (number~) main::$0 == (number) 0
  (byte) isSet::i#0 ← (byte) main::i#2
  (bool) isSet::b#0 ← (bool~) main::$1
  call isSet 
  (bool) isSet::return#0 ← (bool) isSet::return#2
  to:main::@5
main::@5: scope:[main]  from main::@1
  (byte) main::i#6 ← phi( main::@1/(byte) main::i#2 )
  (bool) isSet::return#3 ← phi( main::@1/(bool) isSet::return#0 )
  (bool~) main::$2 ← (bool) isSet::return#3
  if((bool~) main::$2) goto main::@2
  to:main::@4
main::@2: scope:[main]  from main::@5
  (byte) main::i#3 ← phi( main::@5/(byte) main::i#6 )
  *((const byte*) main::screen + (byte) main::i#3) ← (byte) '*'
  to:main::@3
main::@4: scope:[main]  from main::@5
  (byte) main::i#4 ← phi( main::@5/(byte) main::i#6 )
  *((const byte*) main::screen + (byte) main::i#4) ← (byte) ' '
  to:main::@3
main::@3: scope:[main]  from main::@2 main::@4
  (byte) main::i#5 ← phi( main::@2/(byte) main::i#3 main::@4/(byte) main::i#4 )
  (byte) main::i#1 ← (byte) main::i#5 + rangenext(0,$64)
  (bool~) main::$3 ← (byte) main::i#1 != rangelast(0,$64)
  if((bool~) main::$3) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@3
  return 
  to:@return

(bool()) isSet((byte) isSet::i , (bool) isSet::b)
isSet: scope:[isSet]  from main::@1
  (bool) isSet::b#1 ← phi( main::@1/(bool) isSet::b#0 )
  (byte) isSet::i#1 ← phi( main::@1/(byte) isSet::i#0 )
  (number~) isSet::$0 ← (byte) isSet::i#1 & (number) 8
  (bool~) isSet::$1 ← (number~) isSet::$0 != (number) 0
  (bool~) isSet::$2 ← (bool) isSet::b#1 || (bool~) isSet::$1
  (bool) isSet::return#1 ← (bool~) isSet::$2
  to:isSet::@return
isSet::@return: scope:[isSet]  from isSet
  (bool) isSet::return#4 ← phi( isSet/(bool) isSet::return#1 )
  (bool) isSet::return#2 ← (bool) isSet::return#4
  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
(bool()) isSet((byte) isSet::i , (bool) isSet::b)
(number~) isSet::$0
(bool~) isSet::$1
(bool~) isSet::$2
(label) isSet::@return
(bool) isSet::b
(bool) isSet::b#0
(bool) isSet::b#1
(byte) isSet::i
(byte) isSet::i#0
(byte) isSet::i#1
(bool) isSet::return
(bool) isSet::return#0
(bool) isSet::return#1
(bool) isSet::return#2
(bool) isSet::return#3
(bool) isSet::return#4
(void()) main()
(number~) main::$0
(bool~) main::$1
(bool~) main::$2
(bool~) main::$3
(label) main::@1
(label) main::@2
(label) main::@3
(label) main::@4
(label) main::@5
(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) main::i#5
(byte) main::i#6
(const byte*) main::screen = (byte*)(number) $400

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) 0 in (bool~) main::$1 ← (unumber~) main::$0 == (number) 0
Adding number conversion cast (unumber) 8 in (number~) isSet::$0 ← (byte) isSet::i#1 & (number) 8
Adding number conversion cast (unumber) isSet::$0 in (number~) isSet::$0 ← (byte) isSet::i#1 & (unumber)(number) 8
Adding number conversion cast (unumber) 0 in (bool~) isSet::$1 ← (unumber~) isSet::$0 != (number) 0
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 1
Simplifying constant integer cast 0
Simplifying constant integer cast 8
Simplifying constant integer cast 0
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 1
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) 8
Finalized unsigned number type (byte) 0
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~) isSet::$0 ← (byte) isSet::i#1 & (byte) 8
Alias isSet::b#0 = main::$1 
Alias isSet::return#0 = isSet::return#3 
Alias main::i#2 = main::i#6 main::i#3 main::i#4 
Alias isSet::return#1 = isSet::$2 isSet::return#4 isSet::return#2 
Successful SSA optimization Pass2AliasElimination
Alias main::i#2 = main::i#5 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values (byte) isSet::i#1 (byte) isSet::i#0
Identical Phi Values (bool) isSet::b#1 (bool) isSet::b#0
Successful SSA optimization Pass2IdenticalPhiElimination
Simple Condition (bool~) main::$3 [13] if((byte) main::i#1!=rangelast(0,$64)) goto main::@1
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant (const byte) main::i#0 = 0
Successful SSA optimization Pass2ConstantIdentification
Resolved ranged next value [11] main::i#1 ← ++ main::i#2 to ++
Resolved ranged comparison value [13] if(main::i#1!=rangelast(0,$64)) goto main::@1 to (number) $65
Adding number conversion cast (unumber) $65 in if((byte) main::i#1!=(number) $65) goto main::@1
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast $65
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) $65
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::@6(between main::@3 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 
Calls in [main] to isSet:10 

Created 1 initial phi equivalence classes
Coalesced [18] main::i#7 ← main::i#1
Coalesced down to 1 phi equivalence classes
Culled Empty Block (label) @2
Culled Empty Block (label) main::@6
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()

(void()) main()
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~) main::$0 ← (byte) main::i#2 & (byte) 1
  [7] (bool) isSet::b#0 ← (byte~) main::$0 == (byte) 0
  [8] (byte) isSet::i#0 ← (byte) main::i#2
  [9] call isSet 
  [10] (bool) isSet::return#0 ← (bool) isSet::return#1
  to:main::@5
main::@5: scope:[main]  from main::@1
  [11] (bool~) main::$2 ← (bool) isSet::return#0
  [12] if((bool~) main::$2) goto main::@2
  to:main::@4
main::@4: scope:[main]  from main::@5
  [13] *((const byte*) main::screen + (byte) main::i#2) ← (byte) ' '
  to:main::@3
main::@3: scope:[main]  from main::@2 main::@4
  [14] (byte) main::i#1 ← ++ (byte) main::i#2
  [15] if((byte) main::i#1!=(byte) $65) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@3
  [16] return 
  to:@return
main::@2: scope:[main]  from main::@5
  [17] *((const byte*) main::screen + (byte) main::i#2) ← (byte) '*'
  to:main::@3

(bool()) isSet((byte) isSet::i , (bool) isSet::b)
isSet: scope:[isSet]  from main::@1
  [18] (byte~) isSet::$0 ← (byte) isSet::i#0 & (byte) 8
  [19] (bool~) isSet::$1 ← (byte~) isSet::$0 != (byte) 0
  [20] (bool) isSet::return#1 ← (bool) isSet::b#0 || (bool~) isSet::$1
  to:isSet::@return
isSet::@return: scope:[isSet]  from isSet
  [21] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(bool()) isSet((byte) isSet::i , (bool) isSet::b)
(byte~) isSet::$0 2002.0
(bool~) isSet::$1 2002.0
(bool) isSet::b
(bool) isSet::b#0 275.5
(byte) isSet::i
(byte) isSet::i#0 1102.0
(bool) isSet::return
(bool) isSet::return#0 202.0
(bool) isSet::return#1 367.33333333333337
(void()) main()
(byte~) main::$0 202.0
(bool~) main::$2 202.0
(byte) main::i
(byte) main::i#1 151.5
(byte) main::i#2 60.6

Initial phi equivalence classes
[ main::i#2 main::i#1 ]
Added variable main::$0 to live range equivalence class [ main::$0 ]
Added variable isSet::b#0 to live range equivalence class [ isSet::b#0 ]
Added variable isSet::i#0 to live range equivalence class [ isSet::i#0 ]
Added variable isSet::return#0 to live range equivalence class [ isSet::return#0 ]
Added variable main::$2 to live range equivalence class [ main::$2 ]
Added variable isSet::$0 to live range equivalence class [ isSet::$0 ]
Added variable isSet::$1 to live range equivalence class [ isSet::$1 ]
Added variable isSet::return#1 to live range equivalence class [ isSet::return#1 ]
Complete equivalence classes
[ main::i#2 main::i#1 ]
[ main::$0 ]
[ isSet::b#0 ]
[ isSet::i#0 ]
[ isSet::return#0 ]
[ main::$2 ]
[ isSet::$0 ]
[ isSet::$1 ]
[ isSet::return#1 ]
Allocated zp[1]:2 [ main::i#2 main::i#1 ]
Allocated zp[1]:3 [ main::$0 ]
Allocated zp[1]:4 [ isSet::b#0 ]
Allocated zp[1]:5 [ isSet::i#0 ]
Allocated zp[1]:6 [ isSet::return#0 ]
Allocated zp[1]:7 [ main::$2 ]
Allocated zp[1]:8 [ isSet::$0 ]
Allocated zp[1]:9 [ isSet::$1 ]
Allocated zp[1]:10 [ isSet::return#1 ]

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Test a function taking boolean parameter and returning boolean result
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  // @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 screen = $400
    .label __0 = 3
    .label __2 = 7
    .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~) main::$0 ← (byte) main::i#2 & (byte) 1 -- vbuz1=vbuz2_band_vbuc1 
    lda #1
    and.z i
    sta.z __0
    // [7] (bool) isSet::b#0 ← (byte~) main::$0 == (byte) 0 -- vboz1=vbuz2_eq_vbuc1 
    lda.z __0
    eor #0
    beq !+
    lda #1
  !:
    eor #1
    sta.z isSet.b
    // [8] (byte) isSet::i#0 ← (byte) main::i#2 -- vbuz1=vbuz2 
    lda.z i
    sta.z isSet.i
    // [9] call isSet 
    jsr isSet
    // [10] (bool) isSet::return#0 ← (bool) isSet::return#1 -- vboz1=vboz2 
    lda.z isSet.return_1
    sta.z isSet.return
    jmp __b5
    // main::@5
  __b5:
    // [11] (bool~) main::$2 ← (bool) isSet::return#0 -- vboz1=vboz2 
    lda.z isSet.return
    sta.z __2
    // [12] if((bool~) main::$2) goto main::@2 -- vboz1_then_la1 
    lda.z __2
    cmp #0
    bne __b2
    jmp __b4
    // main::@4
  __b4:
    // [13] *((const byte*) main::screen + (byte) main::i#2) ← (byte) ' ' -- pbuc1_derefidx_vbuz1=vbuc2 
    lda #' '
    ldy.z i
    sta screen,y
    jmp __b3
    // main::@3
  __b3:
    // [14] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuz1=_inc_vbuz1 
    inc.z i
    // [15] if((byte) main::i#1!=(byte) $65) goto main::@1 -- vbuz1_neq_vbuc1_then_la1 
    lda #$65
    cmp.z i
    bne __b1_from___b3
    jmp __breturn
    // main::@return
  __breturn:
    // [16] return 
    rts
    // main::@2
  __b2:
    // [17] *((const byte*) main::screen + (byte) main::i#2) ← (byte) '*' -- pbuc1_derefidx_vbuz1=vbuc2 
    lda #'*'
    ldy.z i
    sta screen,y
    jmp __b3
}
  // isSet
// Determine whether to set a char to '*.
// Returns true if i&8!=0 or b=true
// isSet(byte zp(5) i, bool zp(4) b)
isSet: {
    .label __0 = 8
    .label __1 = 9
    .label i = 5
    .label b = 4
    .label return = 6
    .label return_1 = $a
    // [18] (byte~) isSet::$0 ← (byte) isSet::i#0 & (byte) 8 -- vbuz1=vbuz2_band_vbuc1 
    lda #8
    and.z i
    sta.z __0
    // [19] (bool~) isSet::$1 ← (byte~) isSet::$0 != (byte) 0 -- vboz1=vbuz2_neq_vbuc1 
    lda.z __0
    eor #0
    beq !+
    lda #1
  !:
    sta.z __1
    // [20] (bool) isSet::return#1 ← (bool) isSet::b#0 || (bool~) isSet::$1 -- vboz1=vboz2_or_vboz3 
    lda.z b
    ora.z __1
    sta.z return_1
    jmp __breturn
    // isSet::@return
  __breturn:
    // [21] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [7] (bool) isSet::b#0 ← (byte~) main::$0 == (byte) 0 [ main::i#2 isSet::b#0 ] ( main:2 [ main::i#2 isSet::b#0 ] { { isSet::i#0 = main::i#2 } { isSet::return#0 = isSet::return#1 } }  ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp[1]:2 [ main::i#2 main::i#1 ]
Statement [13] *((const byte*) main::screen + (byte) main::i#2) ← (byte) ' ' [ main::i#2 ] ( main:2 [ main::i#2 ] { }  ) always clobbers reg byte a 
Statement [17] *((const byte*) main::screen + (byte) main::i#2) ← (byte) '*' [ main::i#2 ] ( main:2 [ main::i#2 ] { }  ) always clobbers reg byte a 
Statement [19] (bool~) isSet::$1 ← (byte~) isSet::$0 != (byte) 0 [ isSet::b#0 isSet::$1 ] ( main:2::isSet:9 [ main::i#2 isSet::b#0 isSet::$1 ] { { isSet::i#0 = main::i#2 } { isSet::return#0 = isSet::return#1 } }  ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp[1]:4 [ isSet::b#0 ]
Statement [20] (bool) isSet::return#1 ← (bool) isSet::b#0 || (bool~) isSet::$1 [ isSet::return#1 ] ( main:2::isSet:9 [ main::i#2 isSet::return#1 ] { { isSet::i#0 = main::i#2 } { isSet::return#0 = isSet::return#1 } }  ) always clobbers reg byte a 
Statement [6] (byte~) main::$0 ← (byte) main::i#2 & (byte) 1 [ main::i#2 main::$0 ] ( main:2 [ main::i#2 main::$0 ] { { isSet::i#0 = main::i#2 } { isSet::return#0 = isSet::return#1 } }  ) always clobbers reg byte a 
Statement [7] (bool) isSet::b#0 ← (byte~) main::$0 == (byte) 0 [ main::i#2 isSet::b#0 ] ( main:2 [ main::i#2 isSet::b#0 ] { { isSet::i#0 = main::i#2 } { isSet::return#0 = isSet::return#1 } }  ) always clobbers reg byte a 
Statement [13] *((const byte*) main::screen + (byte) main::i#2) ← (byte) ' ' [ main::i#2 ] ( main:2 [ main::i#2 ] { }  ) always clobbers reg byte a 
Statement [17] *((const byte*) main::screen + (byte) main::i#2) ← (byte) '*' [ main::i#2 ] ( main:2 [ main::i#2 ] { }  ) always clobbers reg byte a 
Statement [19] (bool~) isSet::$1 ← (byte~) isSet::$0 != (byte) 0 [ isSet::b#0 isSet::$1 ] ( main:2::isSet:9 [ main::i#2 isSet::b#0 isSet::$1 ] { { isSet::i#0 = main::i#2 } { isSet::return#0 = isSet::return#1 } }  ) always clobbers reg byte a 
Statement [20] (bool) isSet::return#1 ← (bool) isSet::b#0 || (bool~) isSet::$1 [ isSet::return#1 ] ( main:2::isSet:9 [ main::i#2 isSet::return#1 ] { { isSet::i#0 = main::i#2 } { isSet::return#0 = isSet::return#1 } }  ) always clobbers reg byte a 
Potential registers zp[1]:2 [ main::i#2 main::i#1 ] : zp[1]:2 , reg byte x , reg byte y , 
Potential registers zp[1]:3 [ main::$0 ] : zp[1]:3 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:4 [ isSet::b#0 ] : zp[1]:4 , reg byte x , reg byte y , 
Potential registers zp[1]:5 [ isSet::i#0 ] : zp[1]:5 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:6 [ isSet::return#0 ] : zp[1]:6 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:7 [ main::$2 ] : zp[1]:7 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:8 [ isSet::$0 ] : zp[1]:8 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:9 [ isSet::$1 ] : zp[1]:9 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:10 [ isSet::return#1 ] : zp[1]:10 , reg byte a , reg byte x , reg byte y , 

REGISTER UPLIFT SCOPES
Uplift Scope [isSet] 2,002: zp[1]:8 [ isSet::$0 ] 2,002: zp[1]:9 [ isSet::$1 ] 1,102: zp[1]:5 [ isSet::i#0 ] 367.33: zp[1]:10 [ isSet::return#1 ] 275.5: zp[1]:4 [ isSet::b#0 ] 202: zp[1]:6 [ isSet::return#0 ] 
Uplift Scope [main] 212.1: zp[1]:2 [ main::i#2 main::i#1 ] 202: zp[1]:3 [ main::$0 ] 202: zp[1]:7 [ main::$2 ] 
Uplift Scope [] 

Uplifting [isSet] best 1103 combination reg byte a [ isSet::$0 ] reg byte a [ isSet::$1 ] reg byte a [ isSet::i#0 ] reg byte a [ isSet::return#1 ] zp[1]:4 [ isSet::b#0 ] zp[1]:6 [ isSet::return#0 ] 
Limited combination testing to 100 combinations of 3072 possible.
Uplifting [main] best 813 combination reg byte x [ main::i#2 main::i#1 ] reg byte a [ main::$0 ] reg byte a [ main::$2 ] 
Uplifting [] best 813 combination 
Attempting to uplift remaining variables inzp[1]:4 [ isSet::b#0 ]
Uplifting [isSet] best 806 combination reg byte y [ isSet::b#0 ] 
Attempting to uplift remaining variables inzp[1]:6 [ isSet::return#0 ]
Uplifting [isSet] best 746 combination reg byte a [ isSet::return#0 ] 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Test a function taking boolean parameter and returning boolean result
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  // @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 screen = $400
    // [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] -- vbuxx=vbuc1 
    ldx #0
    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~) main::$0 ← (byte) main::i#2 & (byte) 1 -- vbuaa=vbuxx_band_vbuc1 
    txa
    and #1
    // [7] (bool) isSet::b#0 ← (byte~) main::$0 == (byte) 0 -- vboyy=vbuaa_eq_vbuc1 
    eor #0
    beq !+
    lda #1
  !:
    eor #1
    tay
    // [8] (byte) isSet::i#0 ← (byte) main::i#2 -- vbuaa=vbuxx 
    txa
    // [9] call isSet 
    jsr isSet
    // [10] (bool) isSet::return#0 ← (bool) isSet::return#1
    jmp __b5
    // main::@5
  __b5:
    // [11] (bool~) main::$2 ← (bool) isSet::return#0
    // [12] if((bool~) main::$2) goto main::@2 -- vboaa_then_la1 
    cmp #0
    bne __b2
    jmp __b4
    // main::@4
  __b4:
    // [13] *((const byte*) main::screen + (byte) main::i#2) ← (byte) ' ' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #' '
    sta screen,x
    jmp __b3
    // main::@3
  __b3:
    // [14] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuxx=_inc_vbuxx 
    inx
    // [15] if((byte) main::i#1!=(byte) $65) goto main::@1 -- vbuxx_neq_vbuc1_then_la1 
    cpx #$65
    bne __b1_from___b3
    jmp __breturn
    // main::@return
  __breturn:
    // [16] return 
    rts
    // main::@2
  __b2:
    // [17] *((const byte*) main::screen + (byte) main::i#2) ← (byte) '*' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #'*'
    sta screen,x
    jmp __b3
}
  // isSet
// Determine whether to set a char to '*.
// Returns true if i&8!=0 or b=true
// isSet(byte register(A) i, bool register(Y) b)
isSet: {
    // [18] (byte~) isSet::$0 ← (byte) isSet::i#0 & (byte) 8 -- vbuaa=vbuaa_band_vbuc1 
    and #8
    // [19] (bool~) isSet::$1 ← (byte~) isSet::$0 != (byte) 0 -- vboaa=vbuaa_neq_vbuc1 
    eor #0
    beq !+
    lda #1
  !:
    // [20] (bool) isSet::return#1 ← (bool) isSet::b#0 || (bool~) isSet::$1 -- vboaa=vboyy_or_vboaa 
    sty.z $ff
    ora.z $ff
    jmp __breturn
    // isSet::@return
  __breturn:
    // [21] return 
    rts
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp __b1
Removing instruction jmp __bend
Removing instruction jmp __b1
Removing instruction jmp __b5
Removing instruction jmp __b4
Removing instruction jmp __b3
Removing instruction jmp __breturn
Removing instruction jmp __breturn
Succesful ASM optimization Pass5NextJumpElimination
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 __bbegin:
Removing instruction __bend:
Removing instruction __b1_from_main:
Removing instruction __b5:
Removing instruction __b4:
Removing instruction __breturn:
Removing instruction __breturn:
Succesful ASM optimization Pass5UnusedLabelElimination
Removing instruction jsr main
Succesful ASM optimization Pass5SkipBegin
Removing instruction jmp __b1
Succesful ASM optimization Pass5NextJumpElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(bool()) isSet((byte) isSet::i , (bool) isSet::b)
(byte~) isSet::$0 reg byte a 2002.0
(bool~) isSet::$1 reg byte a 2002.0
(label) isSet::@return
(bool) isSet::b
(bool) isSet::b#0 reg byte y 275.5
(byte) isSet::i
(byte) isSet::i#0 reg byte a 1102.0
(bool) isSet::return
(bool) isSet::return#0 reg byte a 202.0
(bool) isSet::return#1 reg byte a 367.33333333333337
(void()) main()
(byte~) main::$0 reg byte a 202.0
(bool~) main::$2 reg byte a 202.0
(label) main::@1
(label) main::@2
(label) main::@3
(label) main::@4
(label) main::@5
(label) main::@return
(byte) main::i
(byte) main::i#1 reg byte x 151.5
(byte) main::i#2 reg byte x 60.6
(const byte*) main::screen = (byte*) 1024

reg byte x [ main::i#2 main::i#1 ]
reg byte a [ main::$0 ]
reg byte y [ isSet::b#0 ]
reg byte a [ isSet::i#0 ]
reg byte a [ isSet::return#0 ]
reg byte a [ main::$2 ]
reg byte a [ isSet::$0 ]
reg byte a [ isSet::$1 ]
reg byte a [ isSet::return#1 ]


FINAL ASSEMBLER
Score: 551

  // File Comments
// Test a function taking boolean parameter and returning boolean result
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  // @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 screen = $400
    // [5] phi from main to main::@1 [phi:main->main::@1]
    // [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuxx=vbuc1 
    ldx #0
    // [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:
    // i&1
    // [6] (byte~) main::$0 ← (byte) main::i#2 & (byte) 1 -- vbuaa=vbuxx_band_vbuc1 
    txa
    and #1
    // isSet(i, (i&1)==0)
    // [7] (bool) isSet::b#0 ← (byte~) main::$0 == (byte) 0 -- vboyy=vbuaa_eq_vbuc1 
    eor #0
    beq !+
    lda #1
  !:
    eor #1
    tay
    // [8] (byte) isSet::i#0 ← (byte) main::i#2 -- vbuaa=vbuxx 
    txa
    // [9] call isSet 
    jsr isSet
    // [10] (bool) isSet::return#0 ← (bool) isSet::return#1
    // main::@5
    // [11] (bool~) main::$2 ← (bool) isSet::return#0
    // if( isSet(i, (i&1)==0))
    // [12] if((bool~) main::$2) goto main::@2 -- vboaa_then_la1 
    cmp #0
    bne __b2
    // main::@4
    // screen[i] = ' '
    // [13] *((const byte*) main::screen + (byte) main::i#2) ← (byte) ' ' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #' '
    sta screen,x
    // main::@3
  __b3:
    // for(byte i: 0..100)
    // [14] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuxx=_inc_vbuxx 
    inx
    // [15] if((byte) main::i#1!=(byte) $65) goto main::@1 -- vbuxx_neq_vbuc1_then_la1 
    cpx #$65
    bne __b1
    // main::@return
    // }
    // [16] return 
    rts
    // main::@2
  __b2:
    // screen[i] = '*'
    // [17] *((const byte*) main::screen + (byte) main::i#2) ← (byte) '*' -- pbuc1_derefidx_vbuxx=vbuc2 
    lda #'*'
    sta screen,x
    jmp __b3
}
  // isSet
// Determine whether to set a char to '*.
// Returns true if i&8!=0 or b=true
// isSet(byte register(A) i, bool register(Y) b)
isSet: {
    // i&8
    // [18] (byte~) isSet::$0 ← (byte) isSet::i#0 & (byte) 8 -- vbuaa=vbuaa_band_vbuc1 
    and #8
    // (i&8)!=0
    // [19] (bool~) isSet::$1 ← (byte~) isSet::$0 != (byte) 0 -- vboaa=vbuaa_neq_vbuc1 
    eor #0
    beq !+
    lda #1
  !:
    // b || ((i&8)!=0)
    // [20] (bool) isSet::return#1 ← (bool) isSet::b#0 || (bool~) isSet::$1 -- vboaa=vboyy_or_vboaa 
    sty.z $ff
    ora.z $ff
    // isSet::@return
    // }
    // [21] return 
    rts
}
  // File Data