Culled Empty Block (label) malloc::@1

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

(void()) main()
main: scope:[main]  from @2
  (byte*) heap_head#13 ← phi( @2/(byte*) heap_head#14 )
  call malloc 
  (void*) malloc::return#0 ← (void*) malloc::return#3
  to:main::@1
main::@1: scope:[main]  from main
  (byte*) heap_head#7 ← phi( main/(byte*) heap_head#5 )
  (void*) malloc::return#4 ← phi( main/(void*) malloc::return#0 )
  (void*~) main::$0 ← (void*) malloc::return#4
  (byte*) heap_head#0 ← (byte*) heap_head#7
  (byte*) main::buf1#0 ← ((byte*)) (void*~) main::$0
  call malloc 
  (void*) malloc::return#1 ← (void*) malloc::return#3
  to:main::@2
main::@2: scope:[main]  from main::@1
  (byte*) main::buf1#1 ← phi( main::@1/(byte*) main::buf1#0 )
  (byte*) heap_head#8 ← phi( main::@1/(byte*) heap_head#5 )
  (void*) malloc::return#5 ← phi( main::@1/(void*) malloc::return#1 )
  (void*~) main::$1 ← (void*) malloc::return#5
  (byte*) heap_head#1 ← (byte*) heap_head#8
  (byte*) main::buf2#0 ← ((byte*)) (void*~) main::$1
  *((byte*) main::buf1#1) ← (byte) 'a'
  *((byte*) main::buf2#0) ← (byte) 'b'
  *((const byte*) SCREEN + (number) 0) ← *((byte*) main::buf1#1)
  *((const byte*) SCREEN + (number) 1) ← *((byte*) main::buf2#0)
  to:main::@return
main::@return: scope:[main]  from main::@2
  (byte*) heap_head#9 ← phi( main::@2/(byte*) heap_head#1 )
  (byte*) heap_head#2 ← (byte*) heap_head#9
  return 
  to:@return
@1: scope:[]  from @begin
  (byte*) heap_head#3 ← (byte*)(number) $c000
  to:@2

(void*()) malloc()
malloc: scope:[malloc]  from main main::@1
  (byte*) heap_head#10 ← phi( main/(byte*) heap_head#13 main::@1/(byte*) heap_head#0 )
  (byte*) heap_head#4 ← ++ (byte*) heap_head#10
  (void*) malloc::return#2 ← ((void*)) (byte*) heap_head#4
  to:malloc::@return
malloc::@return: scope:[malloc]  from malloc
  (byte*) heap_head#11 ← phi( malloc/(byte*) heap_head#4 )
  (void*) malloc::return#6 ← phi( malloc/(void*) malloc::return#2 )
  (void*) malloc::return#3 ← (void*) malloc::return#6
  (byte*) heap_head#5 ← (byte*) heap_head#11
  return 
  to:@return
@2: scope:[]  from @1
  (byte*) heap_head#14 ← phi( @1/(byte*) heap_head#3 )
  call main 
  to:@3
@3: scope:[]  from @2
  (byte*) heap_head#12 ← phi( @2/(byte*) heap_head#2 )
  (byte*) heap_head#6 ← (byte*) heap_head#12
  to:@end
@end: scope:[]  from @3

SYMBOL TABLE SSA
(label) @1
(label) @2
(label) @3
(label) @begin
(label) @end
(const byte*) SCREEN = (byte*)(number) $400
(byte*) heap_head
(byte*) heap_head#0
(byte*) heap_head#1
(byte*) heap_head#10
(byte*) heap_head#11
(byte*) heap_head#12
(byte*) heap_head#13
(byte*) heap_head#14
(byte*) heap_head#2
(byte*) heap_head#3
(byte*) heap_head#4
(byte*) heap_head#5
(byte*) heap_head#6
(byte*) heap_head#7
(byte*) heap_head#8
(byte*) heap_head#9
(void()) main()
(void*~) main::$0
(void*~) main::$1
(label) main::@1
(label) main::@2
(label) main::@return
(byte*) main::buf1
(byte*) main::buf1#0
(byte*) main::buf1#1
(byte*) main::buf2
(byte*) main::buf2#0
(void*()) malloc()
(label) malloc::@return
(void*) malloc::return
(void*) malloc::return#0
(void*) malloc::return#1
(void*) malloc::return#2
(void*) malloc::return#3
(void*) malloc::return#4
(void*) malloc::return#5
(void*) malloc::return#6

Adding number conversion cast (unumber) 0 in *((const byte*) SCREEN + (number) 0) ← *((byte*) main::buf1#1)
Adding number conversion cast (unumber) 1 in *((const byte*) SCREEN + (number) 1) ← *((byte*) main::buf2#0)
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte*) main::buf1#0 ← (byte*)(void*~) main::$0
Inlining cast (byte*) main::buf2#0 ← (byte*)(void*~) main::$1
Inlining cast (void*) malloc::return#2 ← (void*)(byte*) heap_head#4
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 0
Simplifying constant integer cast 1
Simplifying constant pointer cast (byte*) 49152
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) 1
Successful SSA optimization PassNFinalizeNumberTypeConversions
Alias (void*) malloc::return#0 = (void*) malloc::return#4 
Alias (byte*) heap_head#0 = (byte*) heap_head#7 
Alias (void*) malloc::return#1 = (void*) malloc::return#5 
Alias (byte*) main::buf1#0 = (byte*) main::buf1#1 
Alias (byte*) heap_head#1 = (byte*) heap_head#8 (byte*) heap_head#9 (byte*) heap_head#2 
Alias (void*) malloc::return#2 = (void*) malloc::return#6 (void*) malloc::return#3 
Alias (byte*) heap_head#11 = (byte*) heap_head#4 (byte*) heap_head#5 
Alias (byte*) heap_head#14 = (byte*) heap_head#3 
Alias (byte*) heap_head#12 = (byte*) heap_head#6 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values (byte*) heap_head#13 (byte*) heap_head#14
Identical Phi Values (byte*) heap_head#0 (byte*) heap_head#11
Identical Phi Values (byte*) heap_head#1 (byte*) heap_head#11
Identical Phi Values (byte*) heap_head#12 (byte*) heap_head#1
Successful SSA optimization Pass2IdenticalPhiElimination
Constant (const byte*) heap_head#14 = (byte*) 49152
Successful SSA optimization Pass2ConstantIdentification
Simplifying expression containing zero SCREEN in [13] *((const byte*) SCREEN + (byte) 0) ← *((byte*) main::buf1#0)
Successful SSA optimization PassNSimplifyExpressionWithZero
Inlining Noop Cast [3] (byte*) main::buf1#0 ← (byte*)(void*~) main::$0 keeping main::buf1#0
Inlining Noop Cast [7] (byte*) main::buf2#0 ← (byte*)(void*~) main::$1 keeping main::buf2#0
Successful SSA optimization Pass2NopCastInlining
Inlining constant with var siblings (const byte*) heap_head#14
Constant inlined heap_head#14 = (byte*) 49152
Successful SSA optimization Pass2ConstantInlining
Consolidated array index constant in *(SCREEN+1)
Successful SSA optimization Pass2ConstantAdditionElimination
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 @3
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
CALL GRAPH
Calls in [] to main:3 
Calls in [main] to malloc:7 malloc:11 

Created 1 initial phi equivalence classes
Coalesced [10] heap_head#15 ← heap_head#11
Coalesced down to 1 phi equivalence classes
Culled Empty Block (label) @1
Culled Empty Block (label) @3
Renumbering block @2 to @1
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()
  [5] call malloc 
  [6] (void*) malloc::return#0 ← (void*) malloc::return#2
  to:main::@1
main::@1: scope:[main]  from main
  [7] (void*) main::buf1#0 ← (void*) malloc::return#0
  [8] call malloc 
  [9] (void*) malloc::return#1 ← (void*) malloc::return#2
  to:main::@2
main::@2: scope:[main]  from main::@1
  [10] (void*) main::buf2#0 ← (void*) malloc::return#1
  [11] *((byte*)(void*) main::buf1#0) ← (byte) 'a'
  [12] *((byte*)(void*) main::buf2#0) ← (byte) 'b'
  [13] *((const byte*) SCREEN) ← *((byte*)(void*) main::buf1#0)
  [14] *((const byte*) SCREEN+(byte) 1) ← *((byte*)(void*) main::buf2#0)
  to:main::@return
main::@return: scope:[main]  from main::@2
  [15] return 
  to:@return

(void*()) malloc()
malloc: scope:[malloc]  from main main::@1
  [16] (byte*) heap_head#10 ← phi( main/(byte*) 49152 main::@1/(byte*) heap_head#11 )
  [17] (byte*) heap_head#11 ← ++ (byte*) heap_head#10
  [18] (void*) malloc::return#2 ← (void*)(byte*) heap_head#11
  to:malloc::@return
malloc::@return: scope:[malloc]  from malloc
  [19] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(byte*) heap_head
(byte*) heap_head#10 4.0
(byte*) heap_head#11 0.6666666666666666
(void()) main()
(byte*) main::buf1
(void*) main::buf1#0 0.3333333333333333
(byte*) main::buf2
(void*) main::buf2#0 0.5
(void*()) malloc()
(void*) malloc::return
(void*) malloc::return#0 4.0
(void*) malloc::return#1 4.0
(void*) malloc::return#2 1.5

Initial phi equivalence classes
[ heap_head#10 heap_head#11 ]
Added variable malloc::return#0 to live range equivalence class [ malloc::return#0 ]
Added variable main::buf1#0 to live range equivalence class [ main::buf1#0 ]
Added variable malloc::return#1 to live range equivalence class [ malloc::return#1 ]
Added variable main::buf2#0 to live range equivalence class [ main::buf2#0 ]
Added variable malloc::return#2 to live range equivalence class [ malloc::return#2 ]
Complete equivalence classes
[ heap_head#10 heap_head#11 ]
[ malloc::return#0 ]
[ main::buf1#0 ]
[ malloc::return#1 ]
[ main::buf2#0 ]
[ malloc::return#2 ]
Allocated zp[2]:2 [ heap_head#10 heap_head#11 ]
Allocated zp[2]:4 [ malloc::return#0 ]
Allocated zp[2]:6 [ main::buf1#0 ]
Allocated zp[2]:8 [ malloc::return#1 ]
Allocated zp[2]:10 [ main::buf2#0 ]
Allocated zp[2]:12 [ malloc::return#2 ]

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Test void pointer - issues when assigning returns from malloc()
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .label heap_head = 2
  // @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 buf1 = 6
    .label buf2 = $a
    // [5] call malloc 
    // [16] phi from main to malloc [phi:main->malloc]
  malloc_from_main:
    // [16] phi (byte*) heap_head#10 = (byte*) 49152 [phi:main->malloc#0] -- pbuz1=pbuc1 
    lda #<$c000
    sta.z heap_head
    lda #>$c000
    sta.z heap_head+1
    jsr malloc
    // [6] (void*) malloc::return#0 ← (void*) malloc::return#2 -- pvoz1=pvoz2 
    lda.z malloc.return_2
    sta.z malloc.return
    lda.z malloc.return_2+1
    sta.z malloc.return+1
    jmp __b1
    // main::@1
  __b1:
    // [7] (void*) main::buf1#0 ← (void*) malloc::return#0 -- pvoz1=pvoz2 
    lda.z malloc.return
    sta.z buf1
    lda.z malloc.return+1
    sta.z buf1+1
    // [8] call malloc 
    // [16] phi from main::@1 to malloc [phi:main::@1->malloc]
  malloc_from___b1:
    // [16] phi (byte*) heap_head#10 = (byte*) heap_head#11 [phi:main::@1->malloc#0] -- register_copy 
    jsr malloc
    // [9] (void*) malloc::return#1 ← (void*) malloc::return#2 -- pvoz1=pvoz2 
    lda.z malloc.return_2
    sta.z malloc.return_1
    lda.z malloc.return_2+1
    sta.z malloc.return_1+1
    jmp __b2
    // main::@2
  __b2:
    // [10] (void*) main::buf2#0 ← (void*) malloc::return#1 -- pvoz1=pvoz2 
    lda.z malloc.return_1
    sta.z buf2
    lda.z malloc.return_1+1
    sta.z buf2+1
    // [11] *((byte*)(void*) main::buf1#0) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
    lda #'a'
    ldy #0
    sta (buf1),y
    // [12] *((byte*)(void*) main::buf2#0) ← (byte) 'b' -- _deref_pbuz1=vbuc1 
    lda #'b'
    ldy #0
    sta (buf2),y
    // [13] *((const byte*) SCREEN) ← *((byte*)(void*) main::buf1#0) -- _deref_pbuc1=_deref_pbuz1 
    ldy #0
    lda (buf1),y
    sta SCREEN
    // [14] *((const byte*) SCREEN+(byte) 1) ← *((byte*)(void*) main::buf2#0) -- _deref_pbuc1=_deref_pbuz1 
    ldy #0
    lda (buf2),y
    sta SCREEN+1
    jmp __breturn
    // main::@return
  __breturn:
    // [15] return 
    rts
}
  // malloc
malloc: {
    .label return = 4
    .label return_1 = 8
    .label return_2 = $c
    // [17] (byte*) heap_head#11 ← ++ (byte*) heap_head#10 -- pbuz1=_inc_pbuz1 
    inc.z heap_head
    bne !+
    inc.z heap_head+1
  !:
    // [18] (void*) malloc::return#2 ← (void*)(byte*) heap_head#11 -- pvoz1=pvoz2 
    lda.z heap_head
    sta.z return_2
    lda.z heap_head+1
    sta.z return_2+1
    jmp __breturn
    // malloc::@return
  __breturn:
    // [19] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [6] (void*) malloc::return#0 ← (void*) malloc::return#2 [ malloc::return#0 heap_head#11 ] ( main:2 [ malloc::return#0 heap_head#11 ] ) always clobbers reg byte a 
Statement [7] (void*) main::buf1#0 ← (void*) malloc::return#0 [ main::buf1#0 heap_head#11 ] ( main:2 [ main::buf1#0 heap_head#11 ] ) always clobbers reg byte a 
Statement [9] (void*) malloc::return#1 ← (void*) malloc::return#2 [ main::buf1#0 malloc::return#1 ] ( main:2 [ main::buf1#0 malloc::return#1 ] ) always clobbers reg byte a 
Statement [10] (void*) main::buf2#0 ← (void*) malloc::return#1 [ main::buf1#0 main::buf2#0 ] ( main:2 [ main::buf1#0 main::buf2#0 ] ) always clobbers reg byte a 
Statement [11] *((byte*)(void*) main::buf1#0) ← (byte) 'a' [ main::buf1#0 main::buf2#0 ] ( main:2 [ main::buf1#0 main::buf2#0 ] ) always clobbers reg byte a reg byte y 
Statement [12] *((byte*)(void*) main::buf2#0) ← (byte) 'b' [ main::buf1#0 main::buf2#0 ] ( main:2 [ main::buf1#0 main::buf2#0 ] ) always clobbers reg byte a reg byte y 
Statement [13] *((const byte*) SCREEN) ← *((byte*)(void*) main::buf1#0) [ main::buf2#0 ] ( main:2 [ main::buf2#0 ] ) always clobbers reg byte a reg byte y 
Statement [14] *((const byte*) SCREEN+(byte) 1) ← *((byte*)(void*) main::buf2#0) [ ] ( main:2 [ ] ) always clobbers reg byte a reg byte y 
Statement [18] (void*) malloc::return#2 ← (void*)(byte*) heap_head#11 [ malloc::return#2 heap_head#11 ] ( main:2::malloc:5 [ malloc::return#2 heap_head#11 ] main:2::malloc:8 [ main::buf1#0 malloc::return#2 heap_head#11 ] ) always clobbers reg byte a 
Potential registers zp[2]:2 [ heap_head#10 heap_head#11 ] : zp[2]:2 , 
Potential registers zp[2]:4 [ malloc::return#0 ] : zp[2]:4 , 
Potential registers zp[2]:6 [ main::buf1#0 ] : zp[2]:6 , 
Potential registers zp[2]:8 [ malloc::return#1 ] : zp[2]:8 , 
Potential registers zp[2]:10 [ main::buf2#0 ] : zp[2]:10 , 
Potential registers zp[2]:12 [ malloc::return#2 ] : zp[2]:12 , 

REGISTER UPLIFT SCOPES
Uplift Scope [malloc] 4: zp[2]:4 [ malloc::return#0 ] 4: zp[2]:8 [ malloc::return#1 ] 1.5: zp[2]:12 [ malloc::return#2 ] 
Uplift Scope [] 4.67: zp[2]:2 [ heap_head#10 heap_head#11 ] 
Uplift Scope [main] 0.5: zp[2]:10 [ main::buf2#0 ] 0.33: zp[2]:6 [ main::buf1#0 ] 

Uplifting [malloc] best 172 combination zp[2]:4 [ malloc::return#0 ] zp[2]:8 [ malloc::return#1 ] zp[2]:12 [ malloc::return#2 ] 
Uplifting [] best 172 combination zp[2]:2 [ heap_head#10 heap_head#11 ] 
Uplifting [main] best 172 combination zp[2]:10 [ main::buf2#0 ] zp[2]:6 [ main::buf1#0 ] 
Coalescing zero page register [ zp[2]:4 [ malloc::return#0 ] ] with [ zp[2]:6 [ main::buf1#0 ] ] - score: 1
Coalescing zero page register [ zp[2]:8 [ malloc::return#1 ] ] with [ zp[2]:10 [ main::buf2#0 ] ] - score: 1
Coalescing zero page register [ zp[2]:8 [ malloc::return#1 main::buf2#0 ] ] with [ zp[2]:12 [ malloc::return#2 ] ] - score: 1
Allocated (was zp[2]:8) zp[2]:6 [ malloc::return#1 main::buf2#0 malloc::return#2 ]

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Test void pointer - issues when assigning returns from malloc()
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .label heap_head = 2
  // @begin
__bbegin:
  // [1] phi from @begin to @1 [phi:@begin->@1]
__b1_from___bbegin:
  jmp __b1
  // @1
__b1:
  // [2] call main 
  // [4] phi from @1 to main [phi:@1->main]
main_from___b1:
  jsr main
  // [3] phi from @1 to @end [phi:@1->@end]
__bend_from___b1:
  jmp __bend
  // @end
__bend:
  // main
main: {
    .label buf1 = 4
    .label buf2 = 6
    // [5] call malloc 
    // [16] phi from main to malloc [phi:main->malloc]
  malloc_from_main:
    // [16] phi (byte*) heap_head#10 = (byte*) 49152 [phi:main->malloc#0] -- pbuz1=pbuc1 
    lda #<$c000
    sta.z heap_head
    lda #>$c000
    sta.z heap_head+1
    jsr malloc
    // [6] (void*) malloc::return#0 ← (void*) malloc::return#2 -- pvoz1=pvoz2 
    lda.z malloc.return_1
    sta.z malloc.return
    lda.z malloc.return_1+1
    sta.z malloc.return+1
    jmp __b1
    // main::@1
  __b1:
    // [7] (void*) main::buf1#0 ← (void*) malloc::return#0
    // [8] call malloc 
    // [16] phi from main::@1 to malloc [phi:main::@1->malloc]
  malloc_from___b1:
    // [16] phi (byte*) heap_head#10 = (byte*) heap_head#11 [phi:main::@1->malloc#0] -- register_copy 
    jsr malloc
    // [9] (void*) malloc::return#1 ← (void*) malloc::return#2
    jmp __b2
    // main::@2
  __b2:
    // [10] (void*) main::buf2#0 ← (void*) malloc::return#1
    // [11] *((byte*)(void*) main::buf1#0) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
    lda #'a'
    ldy #0
    sta (buf1),y
    // [12] *((byte*)(void*) main::buf2#0) ← (byte) 'b' -- _deref_pbuz1=vbuc1 
    lda #'b'
    ldy #0
    sta (buf2),y
    // [13] *((const byte*) SCREEN) ← *((byte*)(void*) main::buf1#0) -- _deref_pbuc1=_deref_pbuz1 
    ldy #0
    lda (buf1),y
    sta SCREEN
    // [14] *((const byte*) SCREEN+(byte) 1) ← *((byte*)(void*) main::buf2#0) -- _deref_pbuc1=_deref_pbuz1 
    ldy #0
    lda (buf2),y
    sta SCREEN+1
    jmp __breturn
    // main::@return
  __breturn:
    // [15] return 
    rts
}
  // malloc
malloc: {
    .label return = 4
    .label return_1 = 6
    // [17] (byte*) heap_head#11 ← ++ (byte*) heap_head#10 -- pbuz1=_inc_pbuz1 
    inc.z heap_head
    bne !+
    inc.z heap_head+1
  !:
    // [18] (void*) malloc::return#2 ← (void*)(byte*) heap_head#11 -- pvoz1=pvoz2 
    lda.z heap_head
    sta.z return_1
    lda.z heap_head+1
    sta.z return_1+1
    jmp __breturn
    // malloc::@return
  __breturn:
    // [19] 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 __breturn
Removing instruction jmp __breturn
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction ldy #0
Removing instruction ldy #0
Removing instruction ldy #0
Succesful ASM optimization Pass5UnnecesaryLoadElimination
Replacing label __bbegin with __b1
Removing instruction __bbegin:
Removing instruction __b1_from___bbegin:
Removing instruction main_from___b1:
Removing instruction __bend_from___b1:
Removing instruction malloc_from___b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction __bend:
Removing instruction malloc_from_main:
Removing instruction __b1:
Removing instruction __b2:
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 __b1:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(const byte*) SCREEN = (byte*) 1024
(byte*) heap_head
(byte*) heap_head#10 heap_head zp[2]:2 4.0
(byte*) heap_head#11 heap_head zp[2]:2 0.6666666666666666
(void()) main()
(label) main::@1
(label) main::@2
(label) main::@return
(byte*) main::buf1
(void*) main::buf1#0 buf1 zp[2]:4 0.3333333333333333
(byte*) main::buf2
(void*) main::buf2#0 buf2 zp[2]:6 0.5
(void*()) malloc()
(label) malloc::@return
(void*) malloc::return
(void*) malloc::return#0 return zp[2]:4 4.0
(void*) malloc::return#1 return_1 zp[2]:6 4.0
(void*) malloc::return#2 return_1 zp[2]:6 1.5

zp[2]:2 [ heap_head#10 heap_head#11 ]
zp[2]:4 [ malloc::return#0 main::buf1#0 ]
zp[2]:6 [ malloc::return#1 main::buf2#0 malloc::return#2 ]


FINAL ASSEMBLER
Score: 106

  // File Comments
// Test void pointer - issues when assigning returns from malloc()
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .label heap_head = 2
  // @begin
  // [1] phi from @begin to @1 [phi:@begin->@1]
  // @1
  // [2] call main 
  // [4] phi from @1 to main [phi:@1->main]
  // [3] phi from @1 to @end [phi:@1->@end]
  // @end
  // main
main: {
    .label buf1 = 4
    .label buf2 = 6
    // malloc()
    // [5] call malloc 
    // [16] phi from main to malloc [phi:main->malloc]
    // [16] phi (byte*) heap_head#10 = (byte*) 49152 [phi:main->malloc#0] -- pbuz1=pbuc1 
    lda #<$c000
    sta.z heap_head
    lda #>$c000
    sta.z heap_head+1
    jsr malloc
    // malloc()
    // [6] (void*) malloc::return#0 ← (void*) malloc::return#2 -- pvoz1=pvoz2 
    lda.z malloc.return_1
    sta.z malloc.return
    lda.z malloc.return_1+1
    sta.z malloc.return+1
    // main::@1
    // [7] (void*) main::buf1#0 ← (void*) malloc::return#0
    // [8] call malloc 
    // [16] phi from main::@1 to malloc [phi:main::@1->malloc]
    // [16] phi (byte*) heap_head#10 = (byte*) heap_head#11 [phi:main::@1->malloc#0] -- register_copy 
    jsr malloc
    // malloc()
    // [9] (void*) malloc::return#1 ← (void*) malloc::return#2
    // main::@2
    // [10] (void*) main::buf2#0 ← (void*) malloc::return#1
    // *buf1 = 'a'
    // [11] *((byte*)(void*) main::buf1#0) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
    lda #'a'
    ldy #0
    sta (buf1),y
    // *buf2 = 'b'
    // [12] *((byte*)(void*) main::buf2#0) ← (byte) 'b' -- _deref_pbuz1=vbuc1 
    lda #'b'
    sta (buf2),y
    // SCREEN[0] = *buf1
    // [13] *((const byte*) SCREEN) ← *((byte*)(void*) main::buf1#0) -- _deref_pbuc1=_deref_pbuz1 
    lda (buf1),y
    sta SCREEN
    // SCREEN[1] = *buf2
    // [14] *((const byte*) SCREEN+(byte) 1) ← *((byte*)(void*) main::buf2#0) -- _deref_pbuc1=_deref_pbuz1 
    lda (buf2),y
    sta SCREEN+1
    // main::@return
    // }
    // [15] return 
    rts
}
  // malloc
malloc: {
    .label return = 4
    .label return_1 = 6
    // heap_head++;
    // [17] (byte*) heap_head#11 ← ++ (byte*) heap_head#10 -- pbuz1=_inc_pbuz1 
    inc.z heap_head
    bne !+
    inc.z heap_head+1
  !:
    // return heap_head;
    // [18] (void*) malloc::return#2 ← (void*)(byte*) heap_head#11 -- pvoz1=pvoz2 
    lda.z heap_head
    sta.z return_1
    lda.z heap_head+1
    sta.z return_1+1
    // malloc::@return
    // }
    // [19] return 
    rts
}
  // File Data

