Setting inferred volatile on symbol affected by address-of (word*~) main::$0 ← & (word) main::w

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  to:@1
main: scope:[main]  from @1
  (byte*) main::SCREEN#0 ← ((byte*)) (number) $400
  (word) main::w#0 ← (number) $4d2
  (word*~) main::$0 ← & (word) main::w#0
  (word*) main::wp#0 ← (word*~) main::$0
  (void*) main::vp#0 ← ((void*)) (word*) main::wp#0
  (byte*) main::bp#0 ← ((byte*)) (void*) main::vp#0
  *((byte*) main::SCREEN#0) ← *((byte*) main::bp#0)
  to:main::@return
main::@return: scope:[main]  from main
  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()
(word*~) main::$0
(label) main::@return
(byte*) main::SCREEN
(byte*) main::SCREEN#0
(byte*) main::bp
(byte*) main::bp#0
(void*) main::vp
(void*) main::vp#0
(word) main::w
(word) main::w#0
(word*) main::wp
(word*) main::wp#0

Adding number conversion cast (unumber) $4d2 in (word) main::w#0 ← (number) $4d2
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte*) main::SCREEN#0 ← (byte*)(number) $400
Inlining cast (word) main::w#0 ← (unumber)(number) $4d2
Inlining cast (void*) main::vp#0 ← (void*)(word*) main::wp#0
Inlining cast (byte*) main::bp#0 ← (byte*)(void*) main::vp#0
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast $4d2
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (word) $4d2
Successful SSA optimization PassNFinalizeNumberTypeConversions
Alias (word*) main::wp#0 = (word*~) main::$0 
Successful SSA optimization Pass2AliasElimination
Constant right-side identified [2] (word*) main::wp#0 ← & (word) main::w#0
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant (const byte*) main::SCREEN#0 = (byte*) 1024
Constant (const word*) main::wp#0 = &main::w#0
Successful SSA optimization Pass2ConstantIdentification
Constant value identified (void*)main::wp#0 in [4] (void*) main::vp#0 ← (void*)(const word*) main::wp#0
Successful SSA optimization Pass2ConstantValues
Constant (const void*) main::vp#0 = (void*)main::wp#0
Successful SSA optimization Pass2ConstantIdentification
Constant value identified (byte*)main::vp#0 in [2] (byte*) main::bp#0 ← (byte*)(const void*) main::vp#0
Successful SSA optimization Pass2ConstantValues
Constant (const byte*) main::bp#0 = (byte*)main::vp#0
Successful SSA optimization Pass2ConstantIdentification
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
CALL GRAPH
Calls in [] to main:2 

Created 0 initial phi equivalence classes
Coalesced down to 0 phi equivalence classes
Culled Empty Block (label) @2
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @1
Adding NOP phi() at start of @end

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] (word) main::w#0 ← (word) $4d2
  [5] *((const byte*) main::SCREEN#0) ← *((const byte*) main::bp#0)
  to:main::@return
main::@return: scope:[main]  from main
  [6] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(void()) main()
(byte*) main::SCREEN
(byte*) main::bp
(void*) main::vp
(word) main::w
(word) main::w#0 20.0
(word*) main::wp

Initial phi equivalence classes
Complete equivalence classes
[ main::w#0 ]
Allocated zp ZP_WORD:2 [ main::w#0 ]

INITIAL ASM
Target platform is c64basic
  // File Comments
// Test simple void pointer (conversion without casting)
  // 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 
  jsr main
  // [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
  jmp bend
  // @end
bend:
  // main
main: {
    .label SCREEN = $400
    .label wp = w
    .label vp = wp
    .label bp = vp
    .label w = 2
    // [4] (word) main::w#0 ← (word) $4d2 -- vwuz1=vwuc1 
    lda #<$4d2
    sta.z w
    lda #>$4d2
    sta.z w+1
    // [5] *((const byte*) main::SCREEN#0) ← *((const byte*) main::bp#0) -- _deref_pbuc1=_deref_pbuc2 
    lda bp
    sta SCREEN
    jmp breturn
    // main::@return
  breturn:
    // [6] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [4] (word) main::w#0 ← (word) $4d2 [ ] ( main:2 [ ] ) always clobbers reg byte a 
Statement [5] *((const byte*) main::SCREEN#0) ← *((const byte*) main::bp#0) [ ] ( main:2 [ ] ) always clobbers reg byte a 
Potential registers zp ZP_WORD:2 [ main::w#0 ] : zp ZP_WORD:2 , 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 20: zp ZP_WORD:2 [ main::w#0 ] 
Uplift Scope [] 

Uplifting [main] best 39 combination zp ZP_WORD:2 [ main::w#0 ] 
Uplifting [] best 39 combination 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Test simple void pointer (conversion without casting)
  // 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 
  jsr main
  // [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
  jmp bend
  // @end
bend:
  // main
main: {
    .label SCREEN = $400
    .label wp = w
    .label vp = wp
    .label bp = vp
    .label w = 2
    // [4] (word) main::w#0 ← (word) $4d2 -- vwuz1=vwuc1 
    lda #<$4d2
    sta.z w
    lda #>$4d2
    sta.z w+1
    // [5] *((const byte*) main::SCREEN#0) ← *((const byte*) main::bp#0) -- _deref_pbuc1=_deref_pbuc2 
    lda bp
    sta SCREEN
    jmp breturn
    // main::@return
  breturn:
    // [6] return 
    rts
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp b1
Removing instruction jmp bend
Removing instruction jmp breturn
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction bend_from_b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction breturn:
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
(void()) main()
(label) main::@return
(byte*) main::SCREEN
(const byte*) main::SCREEN#0 SCREEN = (byte*) 1024
(byte*) main::bp
(const byte*) main::bp#0 bp = (byte*)(const void*) main::vp#0
(void*) main::vp
(const void*) main::vp#0 vp = (void*)(const word*) main::wp#0
(word) main::w
(word) main::w#0 w zp ZP_WORD:2 20.0
(word*) main::wp
(const word*) main::wp#0 wp = &(word) main::w#0

zp ZP_WORD:2 [ main::w#0 ]


FINAL ASSEMBLER
Score: 24

  // File Comments
// Test simple void pointer (conversion without casting)
  // 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 
  // [3] phi from @1 to @end [phi:@1->@end]
  // @end
  // main
main: {
    .label SCREEN = $400
    .label wp = w
    .label vp = wp
    .label bp = vp
    .label w = 2
    // w = 1234
    // [4] (word) main::w#0 ← (word) $4d2 -- vwuz1=vwuc1 
    lda #<$4d2
    sta.z w
    lda #>$4d2
    sta.z w+1
    // *SCREEN = *bp
    // [5] *((const byte*) main::SCREEN#0) ← *((const byte*) main::bp#0) -- _deref_pbuc1=_deref_pbuc2 
    lda bp
    sta SCREEN
    // main::@return
    // }
    // [6] return 
    rts
}
  // File Data

