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

(void()) main()
main: scope:[main]  from @1
  asm { ldx#0 !: ldatable,x staSCREEN+1,x inx cpx#4 bne!-  }
  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*) SCREEN = (byte*)(number) $400
(void()) main()
(label) main::@return
(const byte*) table[]  = (string) "cml!"z

Simplifying constant pointer cast (byte*) 1024
Successful SSA optimization PassNCastSimplification
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
  asm { ldx#0 !: ldatable,x staSCREEN+1,x inx cpx#4 bne!-  }
  to:main::@return
main::@return: scope:[main]  from main
  [5] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(void()) main()

Initial phi equivalence classes
Complete equivalence classes

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Illustrates how inline assembler can reference data from the outside program without the data being optimized away as unused
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  // @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: {
    // asm { ldx#0 !: ldatable,x staSCREEN+1,x inx cpx#4 bne!-  }
    ldx #0
  !:
    lda table,x
    sta SCREEN+1,x
    inx
    cpx #4
    bne !-
    jmp __breturn
    // main::@return
  __breturn:
    // [5] return 
    rts
}
  // File Data
  table: .text "cml!"

REGISTER UPLIFT POTENTIAL REGISTERS
Statement asm { ldx#0 !: ldatable,x staSCREEN+1,x inx cpx#4 bne!-  } always clobbers reg byte a reg byte x 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 
Uplift Scope [] 

Uplifting [main] best 39 combination 
Uplifting [] best 39 combination 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Illustrates how inline assembler can reference data from the outside program without the data being optimized away as unused
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(__bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  // @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: {
    // asm { ldx#0 !: ldatable,x staSCREEN+1,x inx cpx#4 bne!-  }
    ldx #0
  !:
    lda table,x
    sta SCREEN+1,x
    inx
    cpx #4
    bne !-
    jmp __breturn
    // main::@return
  __breturn:
    // [5] return 
    rts
}
  // File Data
  table: .text "cml!"

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*) SCREEN = (byte*) 1024
(void()) main()
(label) main::@return
(const byte*) table[]  = (string) "cml!"z



FINAL ASSEMBLER
Score: 24

  // File Comments
// Illustrates how inline assembler can reference data from the outside program without the data being optimized away as unused
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label SCREEN = $400
  // @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: {
    // asm
    // asm { ldx#0 !: ldatable,x staSCREEN+1,x inx cpx#4 bne!-  }
    ldx #0
  !:
    lda table,x
    sta SCREEN+1,x
    inx
    cpx #4
    bne !-
    // main::@return
    // }
    // [5] return 
    rts
}
  // File Data
  table: .text "cml!"

