Setting struct to load/store in variable affected by address-of (struct Point*) main::p2 ← &(struct Point) point2
Adding value bulk copy *((struct Point*) main::p2) ← memcpy(*(&(struct Point) point1), struct Point, (const byte) SIZEOF_STRUCT_POINT)
Replacing struct member reference (struct Point) point2.x with member unwinding reference *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_X)
Replacing struct member reference (struct Point) point2.y with member unwinding reference *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y)
Identified constant variable (struct Point*) main::p2

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

(void()) main()
main: scope:[main]  from @1
  *((const struct Point*) main::p2) ← memcpy(*(&(struct Point) point1), struct Point, (const byte) SIZEOF_STRUCT_POINT)
  *((const byte*) SCREEN + (number) 0) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_X)
  *((const byte*) SCREEN + (number) 1) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y)
  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
(const byte) OFFSET_STRUCT_POINT_X = (byte) 0
(const byte) OFFSET_STRUCT_POINT_Y = (byte) 1
(byte) Point::x
(byte) Point::y
(const byte*) SCREEN = (byte*)(number) $400
(const byte) SIZEOF_STRUCT_POINT = (byte) 2
(void()) main()
(label) main::@return
(const struct Point*) main::p2 = &(struct Point) point2
(struct Point) point1 loadstore = { x: (byte) 2, y: (byte) 3 }
(struct Point) point2 loadstore = {}

Adding number conversion cast (unumber) 0 in *((const byte*) SCREEN + (number) 0) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_X)
Adding number conversion cast (unumber) 1 in *((const byte*) SCREEN + (number) 1) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y)
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 0
Simplifying constant integer cast 1
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) 1
Successful SSA optimization PassNFinalizeNumberTypeConversions
Simplifying expression containing zero (byte*)&point2 in [1] *((const byte*) SCREEN + (byte) 0) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_X)
Simplifying expression containing zero SCREEN in [1] *((const byte*) SCREEN + (byte) 0) ← *((byte*)&(struct Point) point2)
Successful SSA optimization PassNSimplifyExpressionWithZero
Eliminating unused constant (const byte) OFFSET_STRUCT_POINT_X
Successful SSA optimization PassNEliminateUnusedVars
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 @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()

(void()) main()
main: scope:[main]  from @1
  [4] *((const struct Point*) main::p2) ← memcpy(*(&(struct Point) point1), struct Point, (const byte) SIZEOF_STRUCT_POINT)
  [5] *((const byte*) SCREEN) ← *((byte*)&(struct Point) point2)
  [6] *((const byte*) SCREEN+(byte) 1) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y)
  to:main::@return
main::@return: scope:[main]  from main
  [7] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(byte) Point::x
(byte) Point::y
(void()) main()
(struct Point) point1 loadstore = { x: (byte) 2, y: (byte) 3 }
(struct Point) point2 loadstore = {}

Initial phi equivalence classes
Added variable point1 to live range equivalence class [ point1 ]
Added variable point2 to live range equivalence class [ point2 ]
Complete equivalence classes
[ point1 ]
[ point2 ]
Allocated mem[2] [ point1 ]
Allocated mem[2] [ point2 ]

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Minimal struct with C-Standard behavior - copy assignment through struct pointer
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .const SIZEOF_STRUCT_POINT = 2
  .const OFFSET_STRUCT_POINT_Y = 1
  // @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 p2 = point2
    // [4] *((const struct Point*) main::p2) ← memcpy(*(&(struct Point) point1), struct Point, (const byte) SIZEOF_STRUCT_POINT) -- _deref_pssc1=_deref_pssc2_memcpy_vbuc3 
    ldy #SIZEOF_STRUCT_POINT
  !:
    lda point1-1,y
    sta p2-1,y
    dey
    bne !-
    // [5] *((const byte*) SCREEN) ← *((byte*)&(struct Point) point2) -- _deref_pbuc1=_deref_pbuc2 
    lda point2
    sta SCREEN
    // [6] *((const byte*) SCREEN+(byte) 1) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y) -- _deref_pbuc1=_deref_pbuc2 
    lda point2+OFFSET_STRUCT_POINT_Y
    sta SCREEN+1
    jmp __breturn
    // main::@return
  __breturn:
    // [7] return 
    rts
}
  // File Data
  point1: .byte 2, 3
  point2: .fill SIZEOF_STRUCT_POINT, 0

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [4] *((const struct Point*) main::p2) ← memcpy(*(&(struct Point) point1), struct Point, (const byte) SIZEOF_STRUCT_POINT) [ point2 ] ( main:2 [ point2 ] ) always clobbers reg byte a reg byte y 
Statement [5] *((const byte*) SCREEN) ← *((byte*)&(struct Point) point2) [ point2 ] ( main:2 [ point2 ] ) always clobbers reg byte a 
Statement [6] *((const byte*) SCREEN+(byte) 1) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y) [ ] ( main:2 [ ] ) always clobbers reg byte a 
Potential registers mem[2] [ point1 ] : mem[2] , 
Potential registers mem[2] [ point2 ] : mem[2] , 

REGISTER UPLIFT SCOPES
Uplift Scope [Point] 
Uplift Scope [main] 
Uplift Scope [] 0: mem[2] [ point1 ] 0: mem[2] [ point2 ] 

Uplifting [Point] best 53 combination 
Uplifting [main] best 53 combination 
Uplifting [] best 53 combination mem[2] [ point1 ] mem[2] [ point2 ] 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Minimal struct with C-Standard behavior - copy assignment through struct pointer
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .const SIZEOF_STRUCT_POINT = 2
  .const OFFSET_STRUCT_POINT_Y = 1
  // @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 p2 = point2
    // [4] *((const struct Point*) main::p2) ← memcpy(*(&(struct Point) point1), struct Point, (const byte) SIZEOF_STRUCT_POINT) -- _deref_pssc1=_deref_pssc2_memcpy_vbuc3 
    ldy #SIZEOF_STRUCT_POINT
  !:
    lda point1-1,y
    sta p2-1,y
    dey
    bne !-
    // [5] *((const byte*) SCREEN) ← *((byte*)&(struct Point) point2) -- _deref_pbuc1=_deref_pbuc2 
    lda point2
    sta SCREEN
    // [6] *((const byte*) SCREEN+(byte) 1) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y) -- _deref_pbuc1=_deref_pbuc2 
    lda point2+OFFSET_STRUCT_POINT_Y
    sta SCREEN+1
    jmp __breturn
    // main::@return
  __breturn:
    // [7] return 
    rts
}
  // File Data
  point1: .byte 2, 3
  point2: .fill SIZEOF_STRUCT_POINT, 0

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp __b1
Removing instruction jmp __bend
Removing instruction jmp __breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing label __bbegin with __b1
Removing instruction __bbegin:
Removing instruction __b1_from___bbegin:
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 __b1:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(const byte) OFFSET_STRUCT_POINT_Y = (byte) 1
(byte) Point::x
(byte) Point::y
(const byte*) SCREEN = (byte*) 1024
(const byte) SIZEOF_STRUCT_POINT = (byte) 2
(void()) main()
(label) main::@return
(const struct Point*) main::p2 = &(struct Point) point2
(struct Point) point1 loadstore mem[2] = { x: (byte) 2, y: (byte) 3 }
(struct Point) point2 loadstore mem[2] = {}

mem[2] [ point1 ]
mem[2] [ point2 ]


FINAL ASSEMBLER
Score: 38

  // File Comments
// Minimal struct with C-Standard behavior - copy assignment through struct pointer
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  .const SIZEOF_STRUCT_POINT = 2
  .const OFFSET_STRUCT_POINT_Y = 1
  // @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 p2 = point2
    // *p2 = point1
    // [4] *((const struct Point*) main::p2) ← memcpy(*(&(struct Point) point1), struct Point, (const byte) SIZEOF_STRUCT_POINT) -- _deref_pssc1=_deref_pssc2_memcpy_vbuc3 
    ldy #SIZEOF_STRUCT_POINT
  !:
    lda point1-1,y
    sta p2-1,y
    dey
    bne !-
    // SCREEN[0] = point2.x
    // [5] *((const byte*) SCREEN) ← *((byte*)&(struct Point) point2) -- _deref_pbuc1=_deref_pbuc2 
    lda point2
    sta SCREEN
    // SCREEN[1] = point2.y
    // [6] *((const byte*) SCREEN+(byte) 1) ← *((byte*)&(struct Point) point2+(const byte) OFFSET_STRUCT_POINT_Y) -- _deref_pbuc1=_deref_pbuc2 
    lda point2+OFFSET_STRUCT_POINT_Y
    sta SCREEN+1
    // main::@return
    // }
    // [7] return 
    rts
}
  // File Data
  point1: .byte 2, 3
  point2: .fill SIZEOF_STRUCT_POINT, 0

