Culled Empty Block (label) main::@2

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

(void()) main()
main: scope:[main]  from @1
  (byte*) main::b#0 ← (const byte*) main::BITMAP+(number) $1fff
  to:main::@1
main::@1: scope:[main]  from main main::@1
  (byte*) main::b#2 ← phi( main/(byte*) main::b#0 main::@1/(byte*) main::b#1 )
  *((byte*) main::b#2) ← (number) $5a
  (byte*) main::b#1 ← (byte*) main::b#2 + rangenext(main::BITMAP+$1fff,main::BITMAP)
  (bool~) main::$0 ← (byte*) main::b#1 != rangelast(main::BITMAP+$1fff,main::BITMAP)
  if((bool~) main::$0) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@1
  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
(void()) main()
(bool~) main::$0
(label) main::@1
(label) main::@return
(const byte*) main::BITMAP = (byte*)(number) $2000
(byte*) main::b
(byte*) main::b#0
(byte*) main::b#1
(byte*) main::b#2

Adding number conversion cast (unumber) $1fff in (byte*) main::b#0 ← (const byte*) main::BITMAP+(number) $1fff
Adding number conversion cast (unumber) $5a in *((byte*) main::b#2) ← (number) $5a
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast *((byte*) main::b#2) ← (unumber)(number) $5a
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 8192
Simplifying constant integer cast $1fff
Simplifying constant integer cast $5a
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (word) $1fff
Finalized unsigned number type (byte) $5a
Successful SSA optimization PassNFinalizeNumberTypeConversions
Simple Condition (bool~) main::$0 [5] if((byte*) main::b#1!=rangelast(main::BITMAP+$1fff,main::BITMAP)) goto main::@1
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant (const byte*) main::b#0 = main::BITMAP+$1fff
Successful SSA optimization Pass2ConstantIdentification
Resolved ranged next value [3] main::b#1 ← -- main::b#2 to --
Resolved ranged comparison value [5] if(main::b#1!=rangelast(main::BITMAP+$1fff,main::BITMAP)) goto main::@1 to (byte*)(const byte*) main::BITMAP-(number) 1
Adding number conversion cast (unumber) 1 in if((byte*) main::b#1!=(byte*)(const byte*) main::BITMAP-(number) 1) goto main::@1
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast (const byte*) main::BITMAP-(unumber)(number) 1
Simplifying constant integer cast 1
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 1
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inlining constant with var siblings (const byte*) main::b#0
Constant inlined main::b#0 = (const byte*) main::BITMAP+(word) $1fff
Successful SSA optimization Pass2ConstantInlining
Added new block during phi lifting main::@3(between main::@1 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 1 initial phi equivalence classes
Coalesced [11] main::b#3 ← main::b#1
Coalesced down to 1 phi equivalence classes
Culled Empty Block (label) @2
Culled Empty Block (label) 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()

(void()) main()
main: scope:[main]  from @1
  [4] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@1
  [5] (byte*) main::b#2 ← phi( main/(const byte*) main::BITMAP+(word) $1fff main::@1/(byte*) main::b#1 )
  [6] *((byte*) main::b#2) ← (byte) $5a
  [7] (byte*) main::b#1 ← -- (byte*) main::b#2
  [8] if((byte*) main::b#1!=(const byte*) main::BITMAP-(byte) 1) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@1
  [9] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(void()) main()
(byte*) main::b
(byte*) main::b#1 16.5
(byte*) main::b#2 16.5

Initial phi equivalence classes
[ main::b#2 main::b#1 ]
Complete equivalence classes
[ main::b#2 main::b#1 ]
Allocated zp[2]:2 [ main::b#2 main::b#1 ]

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Range-based for does not recognize symbolic constants.
// The following should work but gives a not-constant exception
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.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 BITMAP = $2000
    .label b = 2
    // [5] phi from main to main::@1 [phi:main->main::@1]
  __b1_from_main:
    // [5] phi (byte*) main::b#2 = (const byte*) main::BITMAP+(word) $1fff [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<BITMAP+$1fff
    sta.z b
    lda #>BITMAP+$1fff
    sta.z b+1
    jmp __b1
    // [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
  __b1_from___b1:
    // [5] phi (byte*) main::b#2 = (byte*) main::b#1 [phi:main::@1->main::@1#0] -- register_copy 
    jmp __b1
    // main::@1
  __b1:
    // [6] *((byte*) main::b#2) ← (byte) $5a -- _deref_pbuz1=vbuc1 
    lda #$5a
    ldy #0
    sta (b),y
    // [7] (byte*) main::b#1 ← -- (byte*) main::b#2 -- pbuz1=_dec_pbuz1 
    lda.z b
    bne !+
    dec.z b+1
  !:
    dec.z b
    // [8] if((byte*) main::b#1!=(const byte*) main::BITMAP-(byte) 1) goto main::@1 -- pbuz1_neq_pbuc1_then_la1 
    lda.z b+1
    cmp #>BITMAP-1
    bne __b1_from___b1
    lda.z b
    cmp #<BITMAP-1
    bne __b1_from___b1
    jmp __breturn
    // main::@return
  __breturn:
    // [9] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [6] *((byte*) main::b#2) ← (byte) $5a [ main::b#2 ] ( main:2 [ main::b#2 ] ) always clobbers reg byte a reg byte y 
Statement [7] (byte*) main::b#1 ← -- (byte*) main::b#2 [ main::b#1 ] ( main:2 [ main::b#1 ] ) always clobbers reg byte a 
Statement [8] if((byte*) main::b#1!=(const byte*) main::BITMAP-(byte) 1) goto main::@1 [ main::b#1 ] ( main:2 [ main::b#1 ] ) always clobbers reg byte a 
Potential registers zp[2]:2 [ main::b#2 main::b#1 ] : zp[2]:2 , 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 33: zp[2]:2 [ main::b#2 main::b#1 ] 
Uplift Scope [] 

Uplifting [main] best 613 combination zp[2]:2 [ main::b#2 main::b#1 ] 
Uplifting [] best 613 combination 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Range-based for does not recognize symbolic constants.
// The following should work but gives a not-constant exception
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.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 BITMAP = $2000
    .label b = 2
    // [5] phi from main to main::@1 [phi:main->main::@1]
  __b1_from_main:
    // [5] phi (byte*) main::b#2 = (const byte*) main::BITMAP+(word) $1fff [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<BITMAP+$1fff
    sta.z b
    lda #>BITMAP+$1fff
    sta.z b+1
    jmp __b1
    // [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
  __b1_from___b1:
    // [5] phi (byte*) main::b#2 = (byte*) main::b#1 [phi:main::@1->main::@1#0] -- register_copy 
    jmp __b1
    // main::@1
  __b1:
    // [6] *((byte*) main::b#2) ← (byte) $5a -- _deref_pbuz1=vbuc1 
    lda #$5a
    ldy #0
    sta (b),y
    // [7] (byte*) main::b#1 ← -- (byte*) main::b#2 -- pbuz1=_dec_pbuz1 
    lda.z b
    bne !+
    dec.z b+1
  !:
    dec.z b
    // [8] if((byte*) main::b#1!=(const byte*) main::BITMAP-(byte) 1) goto main::@1 -- pbuz1_neq_pbuc1_then_la1 
    lda.z b+1
    cmp #>BITMAP-1
    bne __b1_from___b1
    lda.z b
    cmp #<BITMAP-1
    bne __b1_from___b1
    jmp __breturn
    // main::@return
  __breturn:
    // [9] return 
    rts
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp __b1
Removing instruction jmp __bend
Removing instruction jmp __b1
Removing instruction jmp __breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing label __bbegin with __b1
Replacing label __b1_from___b1 with __b1
Replacing label __b1_from___b1 with __b1
Removing instruction __bbegin:
Removing instruction __b1_from___bbegin:
Removing instruction main_from___b1:
Removing instruction __bend_from___b1:
Removing instruction __b1_from___b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction __bend:
Removing instruction __b1_from_main:
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 __b1:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(void()) main()
(label) main::@1
(label) main::@return
(const byte*) main::BITMAP = (byte*) 8192
(byte*) main::b
(byte*) main::b#1 b zp[2]:2 16.5
(byte*) main::b#2 b zp[2]:2 16.5

zp[2]:2 [ main::b#2 main::b#1 ]


FINAL ASSEMBLER
Score: 511

  // File Comments
// Range-based for does not recognize symbolic constants.
// The following should work but gives a not-constant exception
  // 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 BITMAP = $2000
    .label b = 2
    // [5] phi from main to main::@1 [phi:main->main::@1]
    // [5] phi (byte*) main::b#2 = (const byte*) main::BITMAP+(word) $1fff [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<BITMAP+$1fff
    sta.z b
    lda #>BITMAP+$1fff
    sta.z b+1
    // [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
    // [5] phi (byte*) main::b#2 = (byte*) main::b#1 [phi:main::@1->main::@1#0] -- register_copy 
    // main::@1
  __b1:
    // *b = $5a
    // [6] *((byte*) main::b#2) ← (byte) $5a -- _deref_pbuz1=vbuc1 
    lda #$5a
    ldy #0
    sta (b),y
    // for(byte* b : BITMAP+$1fff..BITMAP)
    // [7] (byte*) main::b#1 ← -- (byte*) main::b#2 -- pbuz1=_dec_pbuz1 
    lda.z b
    bne !+
    dec.z b+1
  !:
    dec.z b
    // [8] if((byte*) main::b#1!=(const byte*) main::BITMAP-(byte) 1) goto main::@1 -- pbuz1_neq_pbuc1_then_la1 
    lda.z b+1
    cmp #>BITMAP-1
    bne __b1
    lda.z b
    cmp #<BITMAP-1
    bne __b1
    // main::@return
    // }
    // [9] return 
    rts
}
  // File Data

