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

(void()) main()
main: scope:[main]  from @1
  if((number) 7<(number) 4) goto main::@1
  to:main::@2
main::@1: scope:[main]  from main
  *((const nomodify byte*) main::SCREEN + (number) 0) ← (byte) '*'
  to:main::@return
main::@2: scope:[main]  from main
  *((const nomodify byte*) main::SCREEN + (number) 0) ← (byte) '!'
  to:main::@return
main::@return: scope:[main]  from main::@1 main::@2
  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()
(label) main::@1
(label) main::@2
(label) main::@return
(const nomodify byte*) main::SCREEN = (byte*)(number) $400

Adding number conversion cast (unumber) 0 in *((const nomodify byte*) main::SCREEN + (number) 0) ← (byte) '*'
Adding number conversion cast (unumber) 0 in *((const nomodify byte*) main::SCREEN + (number) 0) ← (byte) '!'
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 0
Simplifying constant integer cast 0
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Finalized unsigned number type (byte) 0
Successful SSA optimization PassNFinalizeNumberTypeConversions
if() condition always false - eliminating [0] if((number) 7<(number) 4) goto main::@1
Successful SSA optimization Pass2ConstantIfs
Simplifying expression containing zero main::SCREEN in [1] *((const nomodify byte*) main::SCREEN + (byte) 0) ← (byte) '*'
Simplifying expression containing zero main::SCREEN in [2] *((const nomodify byte*) main::SCREEN + (byte) 0) ← (byte) '!'
Successful SSA optimization PassNSimplifyExpressionWithZero
Removing unused block main::@1
Successful SSA optimization Pass2EliminateUnusedBlocks
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
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) @2
Renumbering block main::@2 to main::@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 nomodify byte*) main::SCREEN) ← (byte) '!'
  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
// Ensure that if()'s with constant comparisons are identified and eliminated
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.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: {
    .label SCREEN = $400
    jmp __b1
    // main::@1
  __b1:
    // [5] *((const nomodify byte*) main::SCREEN) ← (byte) '!' -- _deref_pbuc1=vbuc2 
    lda #'!'
    sta SCREEN
    jmp __breturn
    // main::@return
  __breturn:
    // [6] return 
    rts
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [5] *((const nomodify byte*) main::SCREEN) ← (byte) '!' [ ] ( 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
// Ensure that if()'s with constant comparisons are identified and eliminated
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.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: {
    .label SCREEN = $400
    jmp __b1
    // main::@1
  __b1:
    // [5] *((const nomodify byte*) main::SCREEN) ← (byte) '!' -- _deref_pbuc1=vbuc2 
    lda #'!'
    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
Removing instruction __b1_from___bbegin:
Removing instruction __b1:
Removing instruction main_from___b1:
Removing instruction __bend_from___b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction __bbegin:
Removing instruction __bend:
Removing instruction __b1:
Removing instruction __breturn:
Succesful ASM optimization Pass5UnusedLabelElimination
Removing instruction jsr main
Succesful ASM optimization Pass5SkipBegin

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(void()) main()
(label) main::@1
(label) main::@return
(const nomodify byte*) main::SCREEN = (byte*) 1024



FINAL ASSEMBLER
Score: 12

  // File Comments
// Ensure that if()'s with constant comparisons are identified and eliminated
  // 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: {
    .label SCREEN = $400
    // main::@1
    // SCREEN[0] = '!'
    // [5] *((const nomodify byte*) main::SCREEN) ← (byte) '!' -- _deref_pbuc1=vbuc2 
    lda #'!'
    sta SCREEN
    // main::@return
    // }
    // [6] return 
    rts
}
  // File Data