Identified constant variable (byte*) SCREEN
Identified constant variable (byte) cc
Culled Empty Block (label) main::@2
Culled Empty Block (label) main::@4
Culled Empty Block (label) @1
Culled Empty Block (label) @2

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  to:@3

(void()) main()
main: scope:[main]  from @3
  if((number) 1==(number) 1) goto main::@1
  to:main::@3
main::@1: scope:[main]  from main
  *((const byte*) SCREEN + (number) 0) ← (byte) 'a'
  to:main::@return
main::@3: scope:[main]  from main
  call doit 
  to:main::@5
main::@5: scope:[main]  from main::@3
  to:main::@return
main::@return: scope:[main]  from main::@1 main::@5
  return 
  to:@return

(void()) doit()
doit: scope:[doit]  from main::@3
  *((const byte*) SCREEN + (number) 1) ← (const byte) cc
  call doit2 
  to:doit::@1
doit::@1: scope:[doit]  from doit
  to:doit::@return
doit::@return: scope:[doit]  from doit::@1
  return 
  to:@return

(void()) doit2()
doit2: scope:[doit2]  from doit
  *((const byte*) SCREEN + (number) 2) ← (const byte) cc
  to:doit2::@return
doit2::@return: scope:[doit2]  from doit2
  return 
  to:@return
@3: scope:[]  from @begin
  call main 
  to:@4
@4: scope:[]  from @3
  to:@end
@end: scope:[]  from @4

SYMBOL TABLE SSA
(label) @3
(label) @4
(label) @begin
(label) @end
(const byte*) SCREEN = (byte*)(number) $400
(const byte) cc = (byte) 'b'
(void()) doit()
(label) doit::@1
(label) doit::@return
(void()) doit2()
(label) doit2::@return
(void()) main()
(label) main::@1
(label) main::@3
(label) main::@5
(label) main::@return

Adding number conversion cast (unumber) 0 in *((const byte*) SCREEN + (number) 0) ← (byte) 'a'
Adding number conversion cast (unumber) 1 in *((const byte*) SCREEN + (number) 1) ← (const byte) cc
Adding number conversion cast (unumber) 2 in *((const byte*) SCREEN + (number) 2) ← (const byte) cc
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 0
Simplifying constant integer cast 1
Simplifying constant integer cast 2
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) 1
Finalized unsigned number type (byte) 2
Successful SSA optimization PassNFinalizeNumberTypeConversions
if() condition always true - replacing block destination [0] if((number) 1==(number) 1) goto main::@1
Successful SSA optimization Pass2ConstantIfs
Simplifying expression containing zero SCREEN in [1] *((const byte*) SCREEN + (byte) 0) ← (byte) 'a'
Successful SSA optimization PassNSimplifyExpressionWithZero
Removing unused block main::@3
Removing unused block main::@5
Removing unused procedure doit
Removing unused procedure block doit
Removing unused procedure block doit::@1
Removing unused procedure block doit::@return
Removing unused procedure doit2
Removing unused procedure block doit2
Removing unused procedure block doit2::@return
Successful SSA optimization Pass2EliminateUnusedBlocks
Eliminating unused constant (const byte) cc
Successful SSA optimization PassNEliminateUnusedVars
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @3
Adding NOP phi() at start of @4
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
CALL GRAPH
Calls in [] to main:2 

Created 0 initial phi equivalence classes
Coalesced down to 0 phi equivalence classes
Culled Empty Block (label) @4
Renumbering block @3 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()
  to:main::@1
main::@1: scope:[main]  from main
  [5] *((const byte*) SCREEN) ← (byte) 'a'
  to:main::@return
main::@return: scope:[main]  from main::@1
  [6] return 
  to:@return


VARIABLE REGISTER WEIGHTS
(void()) main()

Initial phi equivalence classes
Complete equivalence classes

INITIAL ASM
Target platform is c64basic / MOS6502X
  // File Comments
// Constant if() contains call to (unused) function - should be optimized away
  // 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 
  // [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: {
    jmp __b1
    // main::@1
  __b1:
    // [5] *((const byte*) SCREEN) ← (byte) 'a' -- _deref_pbuc1=vbuc2 
    lda #'a'
    sta SCREEN
    jmp __breturn
    // main::@return
  __breturn:
    // [6] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [5] *((const byte*) SCREEN) ← (byte) 'a' [ ] ( main:2 [ ] ) always clobbers reg byte a 

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

Uplifting [main] best 57 combination 
Uplifting [] best 57 combination 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Constant if() contains call to (unused) function - should be optimized away
  // 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 
  // [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: {
    jmp __b1
    // main::@1
  __b1:
    // [5] *((const byte*) SCREEN) ← (byte) 'a' -- _deref_pbuc1=vbuc2 
    lda #'a'
    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 __b1
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:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction __bend:
Removing instruction __b1:
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::@1
(label) main::@return



FINAL ASSEMBLER
Score: 12

  // File Comments
// Constant if() contains call to (unused) function - should be optimized away
  // 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 
  // [4] phi from @1 to main [phi:@1->main]
  // [3] phi from @1 to @end [phi:@1->@end]
  // @end
  // main
main: {
    // main::@1
    // SCREEN[0] = 'a'
    // [5] *((const byte*) SCREEN) ← (byte) 'a' -- _deref_pbuc1=vbuc2 
    lda #'a'
    sta SCREEN
    // main::@return
    // }
    // [6] return 
    rts
}
  // File Data

