Culled Empty Block (label) @1

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  to:@2

(void()) main()
main: scope:[main]  from @2
  (byte) puta::ph#0 ← (number) 4
  (byte) puta::pl#0 ← (number) 0
  call puta 
  to:main::@1
main::@1: scope:[main]  from main
  (byte) puta::ph#1 ← (number) 5
  (byte) puta::pl#1 ← (number) $18
  call puta 
  to:main::@2
main::@2: scope:[main]  from main::@1
  to:main::@return
main::@return: scope:[main]  from main::@2
  return 
  to:@return

(void()) puta((byte) puta::ph , (byte) puta::pl)
puta: scope:[puta]  from main main::@1
  (byte) puta::pl#2 ← phi( main/(byte) puta::pl#0 main::@1/(byte) puta::pl#1 )
  (byte) puta::ph#2 ← phi( main/(byte) puta::ph#0 main::@1/(byte) puta::ph#1 )
  (byte*~) puta::$0 ← ((byte*)) { (byte) puta::ph#2, (byte) puta::pl#2 }
  (byte*) puta::screen#0 ← (byte*~) puta::$0
  *((byte*) puta::screen#0) ← (byte) 'a'
  to:puta::@return
puta::@return: scope:[puta]  from puta
  return 
  to:@return
@2: scope:[]  from @begin
  call main 
  to:@3
@3: scope:[]  from @2
  to:@end
@end: scope:[]  from @3

SYMBOL TABLE SSA
(label) @2
(label) @3
(label) @begin
(label) @end
(void()) main()
(label) main::@1
(label) main::@2
(label) main::@return
(void()) puta((byte) puta::ph , (byte) puta::pl)
(byte*~) puta::$0
(label) puta::@return
(byte) puta::ph
(byte) puta::ph#0
(byte) puta::ph#1
(byte) puta::ph#2
(byte) puta::pl
(byte) puta::pl#0
(byte) puta::pl#1
(byte) puta::pl#2
(byte*) puta::screen
(byte*) puta::screen#0

Fixing inline constructor with puta::$1 ← (byte)puta::ph#2 w= (byte)puta::pl#2
Successful SSA optimization Pass2FixInlineConstructors
Adding number conversion cast (unumber) 4 in (byte) puta::ph#0 ← (number) 4
Adding number conversion cast (unumber) 0 in (byte) puta::pl#0 ← (number) 0
Adding number conversion cast (unumber) 5 in (byte) puta::ph#1 ← (number) 5
Adding number conversion cast (unumber) $18 in (byte) puta::pl#1 ← (number) $18
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte) puta::ph#0 ← (unumber)(number) 4
Inlining cast (byte) puta::pl#0 ← (unumber)(number) 0
Inlining cast (byte) puta::ph#1 ← (unumber)(number) 5
Inlining cast (byte) puta::pl#1 ← (unumber)(number) $18
Successful SSA optimization Pass2InlineCast
Simplifying constant integer cast 4
Simplifying constant integer cast 0
Simplifying constant integer cast 5
Simplifying constant integer cast $18
Simplifying constant integer cast (byte) puta::ph#2
Simplifying constant integer cast (byte) puta::pl#2
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 4
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) 5
Finalized unsigned number type (byte) $18
Successful SSA optimization PassNFinalizeNumberTypeConversions
Adding pointer type conversion cast (byte*) puta::$0 in (byte*~) puta::$0 ← (word~) puta::$1
Successful SSA optimization PassNAddTypeConversionAssignment
Alias (byte*) puta::screen#0 = (byte*~) puta::$0 
Successful SSA optimization Pass2AliasElimination
Constant (const byte) puta::ph#0 = 4
Constant (const byte) puta::pl#0 = 0
Constant (const byte) puta::ph#1 = 5
Constant (const byte) puta::pl#1 = $18
Successful SSA optimization Pass2ConstantIdentification
Inlining cast (byte*) puta::screen#0 ← (byte*)(word~) puta::$1
Successful SSA optimization Pass2InlineCast
Inlining Noop Cast [5] (byte*) puta::screen#0 ← (byte*)(word~) puta::$1 keeping puta::screen#0
Successful SSA optimization Pass2NopCastInlining
Inlining constant with var siblings (const byte) puta::ph#0
Inlining constant with var siblings (const byte) puta::pl#0
Inlining constant with var siblings (const byte) puta::ph#1
Inlining constant with var siblings (const byte) puta::pl#1
Constant inlined puta::pl#0 = (byte) 0
Constant inlined puta::ph#1 = (byte) 5
Constant inlined puta::ph#0 = (byte) 4
Constant inlined puta::pl#1 = (byte) $18
Successful SSA optimization Pass2ConstantInlining
Adding NOP phi() at start of @begin
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
Adding NOP phi() at start of main::@1
Adding NOP phi() at start of main::@2
CALL GRAPH
Calls in [] to main:2 
Calls in [main] to puta:6 puta:8 

Created 2 initial phi equivalence classes
Coalesced down to 2 phi equivalence classes
Culled Empty Block (label) @3
Culled Empty Block (label) main::@2
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
Adding NOP phi() at start of main::@1

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 puta 
  to:main::@1
main::@1: scope:[main]  from main
  [6] phi()
  [7] call puta 
  to:main::@return
main::@return: scope:[main]  from main::@1
  [8] return 
  to:@return

(void()) puta((byte) puta::ph , (byte) puta::pl)
puta: scope:[puta]  from main main::@1
  [9] (byte) puta::pl#2 ← phi( main/(byte) 0 main::@1/(byte) $18 )
  [9] (byte) puta::ph#2 ← phi( main/(byte) 4 main::@1/(byte) 5 )
  [10] (word) puta::screen#0 ← (byte) puta::ph#2 w= (byte) puta::pl#2
  [11] *((byte*)(word) puta::screen#0) ← (byte) 'a'
  to:puta::@return
puta::@return: scope:[puta]  from puta
  [12] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(void()) main()
(void()) puta((byte) puta::ph , (byte) puta::pl)
(byte) puta::ph
(byte) puta::ph#2 2.0
(byte) puta::pl
(byte) puta::pl#2 2.0
(byte*) puta::screen
(word) puta::screen#0 2.0

Initial phi equivalence classes
[ puta::ph#2 ]
[ puta::pl#2 ]
Added variable puta::screen#0 to live range equivalence class [ puta::screen#0 ]
Complete equivalence classes
[ puta::ph#2 ]
[ puta::pl#2 ]
[ puta::screen#0 ]
Allocated zp[1]:2 [ puta::ph#2 ]
Allocated zp[1]:3 [ puta::pl#2 ]
Allocated zp[2]:4 [ puta::screen#0 ]

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Tests creating a literal pointer from two bytes
  // 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: {
    // [5] call puta 
    // [9] phi from main to puta [phi:main->puta]
  puta_from_main:
    // [9] phi (byte) puta::pl#2 = (byte) 0 [phi:main->puta#0] -- vbuz1=vbuc1 
    lda #0
    sta.z puta.pl
    // [9] phi (byte) puta::ph#2 = (byte) 4 [phi:main->puta#1] -- vbuz1=vbuc1 
    lda #4
    sta.z puta.ph
    jsr puta
    // [6] phi from main to main::@1 [phi:main->main::@1]
  __b1_from_main:
    jmp __b1
    // main::@1
  __b1:
    // [7] call puta 
    // [9] phi from main::@1 to puta [phi:main::@1->puta]
  puta_from___b1:
    // [9] phi (byte) puta::pl#2 = (byte) $18 [phi:main::@1->puta#0] -- vbuz1=vbuc1 
    lda #$18
    sta.z puta.pl
    // [9] phi (byte) puta::ph#2 = (byte) 5 [phi:main::@1->puta#1] -- vbuz1=vbuc1 
    lda #5
    sta.z puta.ph
    jsr puta
    jmp __breturn
    // main::@return
  __breturn:
    // [8] return 
    rts
}
  // puta
// puta(byte zp(2) ph, byte zp(3) pl)
puta: {
    .label screen = 4
    .label ph = 2
    .label pl = 3
    // [10] (word) puta::screen#0 ← (byte) puta::ph#2 w= (byte) puta::pl#2 -- vwuz1=vbuz2_word_vbuz3 
    lda.z ph
    sta.z screen+1
    lda.z pl
    sta.z screen
    // [11] *((byte*)(word) puta::screen#0) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
    lda #'a'
    ldy #0
    sta (screen),y
    jmp __breturn
    // puta::@return
  __breturn:
    // [12] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [11] *((byte*)(word) puta::screen#0) ← (byte) 'a' [ ] ( main:2::puta:5 [ ] main:2::puta:7 [ ] ) always clobbers reg byte a reg byte y 
Potential registers zp[1]:2 [ puta::ph#2 ] : zp[1]:2 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[1]:3 [ puta::pl#2 ] : zp[1]:3 , reg byte a , reg byte x , reg byte y , 
Potential registers zp[2]:4 [ puta::screen#0 ] : zp[2]:4 , 

REGISTER UPLIFT SCOPES
Uplift Scope [puta] 2: zp[1]:2 [ puta::ph#2 ] 2: zp[1]:3 [ puta::pl#2 ] 2: zp[2]:4 [ puta::screen#0 ] 
Uplift Scope [main] 
Uplift Scope [] 

Uplifting [puta] best 69 combination reg byte a [ puta::ph#2 ] reg byte x [ puta::pl#2 ] zp[2]:4 [ puta::screen#0 ] 
Uplifting [main] best 69 combination 
Uplifting [] best 69 combination 
Allocated (was zp[2]:4) zp[2]:2 [ puta::screen#0 ]

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Tests creating a literal pointer from two bytes
  // 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: {
    // [5] call puta 
    // [9] phi from main to puta [phi:main->puta]
  puta_from_main:
    // [9] phi (byte) puta::pl#2 = (byte) 0 [phi:main->puta#0] -- vbuxx=vbuc1 
    ldx #0
    // [9] phi (byte) puta::ph#2 = (byte) 4 [phi:main->puta#1] -- vbuaa=vbuc1 
    lda #4
    jsr puta
    // [6] phi from main to main::@1 [phi:main->main::@1]
  __b1_from_main:
    jmp __b1
    // main::@1
  __b1:
    // [7] call puta 
    // [9] phi from main::@1 to puta [phi:main::@1->puta]
  puta_from___b1:
    // [9] phi (byte) puta::pl#2 = (byte) $18 [phi:main::@1->puta#0] -- vbuxx=vbuc1 
    ldx #$18
    // [9] phi (byte) puta::ph#2 = (byte) 5 [phi:main::@1->puta#1] -- vbuaa=vbuc1 
    lda #5
    jsr puta
    jmp __breturn
    // main::@return
  __breturn:
    // [8] return 
    rts
}
  // puta
// puta(byte register(A) ph, byte register(X) pl)
puta: {
    .label screen = 2
    // [10] (word) puta::screen#0 ← (byte) puta::ph#2 w= (byte) puta::pl#2 -- vwuz1=vbuaa_word_vbuxx 
    sta.z screen+1
    stx.z screen
    // [11] *((byte*)(word) puta::screen#0) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
    lda #'a'
    ldy #0
    sta (screen),y
    jmp __breturn
    // puta::@return
  __breturn:
    // [12] return 
    rts
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp __b1
Removing instruction jmp __bend
Removing instruction jmp __b1
Removing instruction jmp __breturn
Removing instruction jmp __breturn
Succesful ASM optimization Pass5NextJumpElimination
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 __b1_from_main:
Removing instruction puta_from___b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction __bend:
Removing instruction puta_from_main:
Removing instruction __b1:
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
(void()) main()
(label) main::@1
(label) main::@return
(void()) puta((byte) puta::ph , (byte) puta::pl)
(label) puta::@return
(byte) puta::ph
(byte) puta::ph#2 reg byte a 2.0
(byte) puta::pl
(byte) puta::pl#2 reg byte x 2.0
(byte*) puta::screen
(word) puta::screen#0 screen zp[2]:2 2.0

reg byte a [ puta::ph#2 ]
reg byte x [ puta::pl#2 ]
zp[2]:2 [ puta::screen#0 ]


FINAL ASSEMBLER
Score: 48

  // File Comments
// Tests creating a literal pointer from two bytes
  // 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: {
    // puta(4, 0x00)
    // [5] call puta 
    // [9] phi from main to puta [phi:main->puta]
    // [9] phi (byte) puta::pl#2 = (byte) 0 [phi:main->puta#0] -- vbuxx=vbuc1 
    ldx #0
    // [9] phi (byte) puta::ph#2 = (byte) 4 [phi:main->puta#1] -- vbuaa=vbuc1 
    lda #4
    jsr puta
    // [6] phi from main to main::@1 [phi:main->main::@1]
    // main::@1
    // puta(5, 0x18)
    // [7] call puta 
    // [9] phi from main::@1 to puta [phi:main::@1->puta]
    // [9] phi (byte) puta::pl#2 = (byte) $18 [phi:main::@1->puta#0] -- vbuxx=vbuc1 
    ldx #$18
    // [9] phi (byte) puta::ph#2 = (byte) 5 [phi:main::@1->puta#1] -- vbuaa=vbuc1 
    lda #5
    jsr puta
    // main::@return
    // }
    // [8] return 
    rts
}
  // puta
// puta(byte register(A) ph, byte register(X) pl)
puta: {
    .label screen = 2
    // (byte*) { ph, pl }
    // [10] (word) puta::screen#0 ← (byte) puta::ph#2 w= (byte) puta::pl#2 -- vwuz1=vbuaa_word_vbuxx 
    sta.z screen+1
    stx.z screen
    // *screen = 'a'
    // [11] *((byte*)(word) puta::screen#0) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
    lda #'a'
    ldy #0
    sta (screen),y
    // puta::@return
    // }
    // [12] return 
    rts
}
  // File Data

