kickc/src/test/ref/loop-break-continue.log

Adding pointer type conversion cast (byte*) main::screen in (byte*) main::screen ← (number) $400
Culled Empty Block (label) main::@6
Culled Empty Block (label) main::@3
Culled Empty Block (label) main::@7
Culled Empty Block (label) main::@8
Culled Empty Block (label) main::@9
Culled Empty Block (label) main::@10

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  to:@1
main: scope:[main]  from @1
  (byte*) main::screen#0 ← ((byte*)) (number) $400
  (byte[]) main::str#0 ← (const string) main::$5
  (byte) main::i#0 ← (byte) 0
  to:main::@1
main::@1: scope:[main]  from main main::@5
  (byte*) main::screen#4 ← phi( main/(byte*) main::screen#0 main::@5/(byte*) main::screen#5 )
  (byte) main::i#2 ← phi( main/(byte) main::i#0 main::@5/(byte) main::i#1 )
  (bool~) main::$0 ← *((byte[]) main::str#0 + (byte) main::i#2) == (byte) '@'
  (bool~) main::$1 ← ! (bool~) main::$0
  if((bool~) main::$1) goto main::@2
  to:main::@return
main::@2: scope:[main]  from main::@1
  (byte*) main::screen#3 ← phi( main::@1/(byte*) main::screen#4 )
  (byte) main::i#3 ← phi( main::@1/(byte) main::i#2 )
  (bool~) main::$2 ← *((byte[]) main::str#0 + (byte) main::i#3) == (byte) ' '
  (bool~) main::$3 ← ! (bool~) main::$2
  if((bool~) main::$3) goto main::@4
  to:main::@5
main::@4: scope:[main]  from main::@2
  (byte*) main::screen#2 ← phi( main::@2/(byte*) main::screen#3 )
  (byte) main::i#4 ← phi( main::@2/(byte) main::i#3 )
  *((byte*) main::screen#2) ← *((byte[]) main::str#0 + (byte) main::i#4)
  (byte*) main::screen#1 ← ++ (byte*) main::screen#2
  to:main::@5
main::@5: scope:[main]  from main::@2 main::@4
  (byte*) main::screen#5 ← phi( main::@2/(byte*) main::screen#3 main::@4/(byte*) main::screen#1 )
  (byte) main::i#5 ← phi( main::@2/(byte) main::i#3 main::@4/(byte) main::i#4 )
  (byte) main::i#1 ← (byte) main::i#5 + rangenext(0,$ff)
  (bool~) main::$4 ← (byte) main::i#1 != rangelast(0,$ff)
  if((bool~) main::$4) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@1 main::@5
  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()
(bool~) main::$0
(bool~) main::$1
(bool~) main::$2
(bool~) main::$3
(bool~) main::$4
(const string) main::$5 = (string) "hello brave new world@"
(label) main::@1
(label) main::@2
(label) main::@4
(label) main::@5
(label) main::@return
(byte) main::i
(byte) main::i#0
(byte) main::i#1
(byte) main::i#2
(byte) main::i#3
(byte) main::i#4
(byte) main::i#5
(byte*) main::screen
(byte*) main::screen#0
(byte*) main::screen#1
(byte*) main::screen#2
(byte*) main::screen#3
(byte*) main::screen#4
(byte*) main::screen#5
(byte[]) main::str
(byte[]) main::str#0

Inlining cast (byte*) main::screen#0 ← (byte*)(number) $400
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 1024
Successful SSA optimization PassNCastSimplification
Inversing boolean not [5] (bool~) main::$1 ← *((byte[]) main::str#0 + (byte) main::i#2) != (byte) '@' from [4] (bool~) main::$0 ← *((byte[]) main::str#0 + (byte) main::i#2) == (byte) '@'
Inversing boolean not [9] (bool~) main::$3 ← *((byte[]) main::str#0 + (byte) main::i#3) != (byte) ' ' from [8] (bool~) main::$2 ← *((byte[]) main::str#0 + (byte) main::i#3) == (byte) ' '
Successful SSA optimization Pass2UnaryNotSimplification
Alias (byte) main::i#2 = (byte) main::i#3 (byte) main::i#4 
Alias (byte*) main::screen#2 = (byte*) main::screen#3 (byte*) main::screen#4 
Successful SSA optimization Pass2AliasElimination
Alias (byte) main::i#2 = (byte) main::i#5 
Successful SSA optimization Pass2AliasElimination
Simple Condition (bool~) main::$1 [6] if(*((byte[]) main::str#0 + (byte) main::i#2)!=(byte) '@') goto main::@2
Simple Condition (bool~) main::$3 [10] if(*((byte[]) main::str#0 + (byte) main::i#2)!=(byte) ' ') goto main::@4
Simple Condition (bool~) main::$4 [17] if((byte) main::i#1!=rangelast(0,$ff)) goto main::@1
Successful SSA optimization Pass2ConditionalJumpSimplification
Negating conditional jump and destination [10] if(*((byte[]) main::str#0 + (byte) main::i#2)==(byte) ' ') goto main::@5
Negating conditional jump and destination [17] if((byte) main::i#1==rangelast(0,$ff)) goto main::@return
Successful SSA optimization Pass2ConditionalJumpSequenceImprovement
Constant (const byte*) main::screen#0 = (byte*) 1024
Constant (const byte[]) main::str#0 = main::$5
Constant (const byte) main::i#0 = 0
Successful SSA optimization Pass2ConstantIdentification
Resolved ranged next value [15] main::i#1 ← ++ main::i#2 to ++
Resolved ranged comparison value [17] if(main::i#1==rangelast(0,$ff)) goto main::@return to (number) 0
Adding number conversion cast (unumber) 0 in if((byte) main::i#1==(number) 0) goto main::@return
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast 0
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 0
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inlining constant with var siblings (const byte*) main::screen#0
Inlining constant with var siblings (const byte) main::i#0
Constant inlined main::$5 = (const byte[]) main::str#0
Constant inlined main::screen#0 = (byte*) 1024
Constant inlined main::i#0 = (byte) 0
Successful SSA optimization Pass2ConstantInlining
Added new block during phi lifting main::@11(between main::@5 and main::@1)
Added new block during phi lifting main::@12(between main::@2 and main::@5)
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 3 initial phi equivalence classes
Coalesced [12] main::screen#8 ← main::screen#1
Coalesced [16] main::i#6 ← main::i#1
Coalesced [17] main::screen#6 ← main::screen#5
Coalesced (already) [18] main::screen#7 ← main::screen#2
Coalesced down to 2 phi equivalence classes
Culled Empty Block (label) @2
Culled Empty Block (label) main::@11
Culled Empty Block (label) main::@12
Renumbering block main::@4 to main::@3
Renumbering block main::@5 to main::@4
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()
main: scope:[main]  from @1
  [4] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@4
  [5] (byte*) main::screen#2 ← phi( main/(byte*) 1024 main::@4/(byte*) main::screen#5 )
  [5] (byte) main::i#2 ← phi( main/(byte) 0 main::@4/(byte) main::i#1 )
  [6] if(*((const byte[]) main::str#0 + (byte) main::i#2)!=(byte) '@') goto main::@2
  to:main::@return
main::@return: scope:[main]  from main::@1 main::@4
  [7] return 
  to:@return
main::@2: scope:[main]  from main::@1
  [8] if(*((const byte[]) main::str#0 + (byte) main::i#2)==(byte) ' ') goto main::@4
  to:main::@3
main::@3: scope:[main]  from main::@2
  [9] *((byte*) main::screen#2) ← *((const byte[]) main::str#0 + (byte) main::i#2)
  [10] (byte*) main::screen#1 ← ++ (byte*) main::screen#2
  to:main::@4
main::@4: scope:[main]  from main::@2 main::@3
  [11] (byte*) main::screen#5 ← phi( main::@2/(byte*) main::screen#2 main::@3/(byte*) main::screen#1 )
  [12] (byte) main::i#1 ← ++ (byte) main::i#2
  [13] if((byte) main::i#1==(byte) 0) goto main::@return
  to:main::@1


VARIABLE REGISTER WEIGHTS
(void()) main()
(byte) main::i
(byte) main::i#1 16.5
(byte) main::i#2 9.166666666666666
(byte*) main::screen
(byte*) main::screen#1 22.0
(byte*) main::screen#2 11.0
(byte*) main::screen#5 11.0
(byte[]) main::str

Initial phi equivalence classes
[ main::i#2 main::i#1 ]
[ main::screen#2 main::screen#5 main::screen#1 ]
Complete equivalence classes
[ main::i#2 main::i#1 ]
[ main::screen#2 main::screen#5 main::screen#1 ]
Allocated zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Allocated zp ZP_WORD:3 [ main::screen#2 main::screen#5 main::screen#1 ]

INITIAL ASM
//SEG0 File Comments
// Illustrates both break & continue statements in a loop
// Prints a message ending at '@' skipping all spaces
//SEG1 Basic Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
//SEG2 Global Constants & labels
//SEG3 @begin
bbegin:
//SEG4 [1] phi from @begin to @1 [phi:@begin->@1]
b1_from_bbegin:
  jmp b1
//SEG5 @1
b1:
//SEG6 [2] call main 
//SEG7 [4] phi from @1 to main [phi:@1->main]
main_from_b1:
  jsr main
//SEG8 [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
  jmp bend
//SEG9 @end
bend:
//SEG10 main
main: {
    .label screen = 3
    .label i = 2
  //SEG11 [5] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
  //SEG12 [5] phi (byte*) main::screen#2 = (byte*) 1024 [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<$400
    sta screen
    lda #>$400
    sta screen+1
  //SEG13 [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#1] -- vbuz1=vbuc1 
    lda #0
    sta i
    jmp b1
  //SEG14 main::@1
  b1:
  //SEG15 [6] if(*((const byte[]) main::str#0 + (byte) main::i#2)!=(byte) '@') goto main::@2 -- pbuc1_derefidx_vbuz1_neq_vbuc2_then_la1 
    lda #'@'
    ldy i
    cmp str,y
    bne b2
    jmp breturn
  //SEG16 main::@return
  breturn:
  //SEG17 [7] return 
    rts
  //SEG18 main::@2
  b2:
  //SEG19 [8] if(*((const byte[]) main::str#0 + (byte) main::i#2)==(byte) ' ') goto main::@4 -- pbuc1_derefidx_vbuz1_eq_vbuc2_then_la1 
    ldy i
    lda str,y
    cmp #' '
    beq b4_from_b2
    jmp b3
  //SEG20 main::@3
  b3:
  //SEG21 [9] *((byte*) main::screen#2) ← *((const byte[]) main::str#0 + (byte) main::i#2) -- _deref_pbuz1=pbuc1_derefidx_vbuz2 
    ldy i
    lda str,y
    ldy #0
    sta (screen),y
  //SEG22 [10] (byte*) main::screen#1 ← ++ (byte*) main::screen#2 -- pbuz1=_inc_pbuz1 
    inc screen
    bne !+
    inc screen+1
  !:
  //SEG23 [11] phi from main::@2 main::@3 to main::@4 [phi:main::@2/main::@3->main::@4]
  b4_from_b2:
  b4_from_b3:
  //SEG24 [11] phi (byte*) main::screen#5 = (byte*) main::screen#2 [phi:main::@2/main::@3->main::@4#0] -- register_copy 
    jmp b4
  //SEG25 main::@4
  b4:
  //SEG26 [12] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuz1=_inc_vbuz1 
    inc i
  //SEG27 [13] if((byte) main::i#1==(byte) 0) goto main::@return -- vbuz1_eq_0_then_la1 
    lda i
    cmp #0
    beq breturn
  //SEG28 [5] phi from main::@4 to main::@1 [phi:main::@4->main::@1]
  b1_from_b4:
  //SEG29 [5] phi (byte*) main::screen#2 = (byte*) main::screen#5 [phi:main::@4->main::@1#0] -- register_copy 
  //SEG30 [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@4->main::@1#1] -- register_copy 
    jmp b1
    str: .text "hello brave new world@"
}

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [6] if(*((const byte[]) main::str#0 + (byte) main::i#2)!=(byte) '@') goto main::@2 [ main::i#2 main::screen#2 ] ( main:2 [ main::i#2 main::screen#2 ] ) always clobbers reg byte a 
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Statement [8] if(*((const byte[]) main::str#0 + (byte) main::i#2)==(byte) ' ') goto main::@4 [ main::i#2 main::screen#2 ] ( main:2 [ main::i#2 main::screen#2 ] ) always clobbers reg byte a 
Statement [9] *((byte*) main::screen#2) ← *((const byte[]) main::str#0 + (byte) main::i#2) [ main::i#2 main::screen#2 ] ( main:2 [ main::i#2 main::screen#2 ] ) always clobbers reg byte a reg byte y 
Removing always clobbered register reg byte y as potential for zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Statement [6] if(*((const byte[]) main::str#0 + (byte) main::i#2)!=(byte) '@') goto main::@2 [ main::i#2 main::screen#2 ] ( main:2 [ main::i#2 main::screen#2 ] ) always clobbers reg byte a 
Statement [8] if(*((const byte[]) main::str#0 + (byte) main::i#2)==(byte) ' ') goto main::@4 [ main::i#2 main::screen#2 ] ( main:2 [ main::i#2 main::screen#2 ] ) always clobbers reg byte a 
Statement [9] *((byte*) main::screen#2) ← *((const byte[]) main::str#0 + (byte) main::i#2) [ main::i#2 main::screen#2 ] ( main:2 [ main::i#2 main::screen#2 ] ) always clobbers reg byte a reg byte y 
Potential registers zp ZP_BYTE:2 [ main::i#2 main::i#1 ] : zp ZP_BYTE:2 , reg byte x , 
Potential registers zp ZP_WORD:3 [ main::screen#2 main::screen#5 main::screen#1 ] : zp ZP_WORD:3 , 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 44: zp ZP_WORD:3 [ main::screen#2 main::screen#5 main::screen#1 ] 25.67: zp ZP_BYTE:2 [ main::i#2 main::i#1 ] 
Uplift Scope [] 

Uplifting [main] best 783 combination zp ZP_WORD:3 [ main::screen#2 main::screen#5 main::screen#1 ] reg byte x [ main::i#2 main::i#1 ] 
Uplifting [] best 783 combination 
Allocated (was zp ZP_WORD:3) zp ZP_WORD:2 [ main::screen#2 main::screen#5 main::screen#1 ]

ASSEMBLER BEFORE OPTIMIZATION
//SEG0 File Comments
// Illustrates both break & continue statements in a loop
// Prints a message ending at '@' skipping all spaces
//SEG1 Basic Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
//SEG2 Global Constants & labels
//SEG3 @begin
bbegin:
//SEG4 [1] phi from @begin to @1 [phi:@begin->@1]
b1_from_bbegin:
  jmp b1
//SEG5 @1
b1:
//SEG6 [2] call main 
//SEG7 [4] phi from @1 to main [phi:@1->main]
main_from_b1:
  jsr main
//SEG8 [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
  jmp bend
//SEG9 @end
bend:
//SEG10 main
main: {
    .label screen = 2
  //SEG11 [5] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
  //SEG12 [5] phi (byte*) main::screen#2 = (byte*) 1024 [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<$400
    sta screen
    lda #>$400
    sta screen+1
  //SEG13 [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#1] -- vbuxx=vbuc1 
    ldx #0
    jmp b1
  //SEG14 main::@1
  b1:
  //SEG15 [6] if(*((const byte[]) main::str#0 + (byte) main::i#2)!=(byte) '@') goto main::@2 -- pbuc1_derefidx_vbuxx_neq_vbuc2_then_la1 
    lda str,x
    cmp #'@'
    bne b2
    jmp breturn
  //SEG16 main::@return
  breturn:
  //SEG17 [7] return 
    rts
  //SEG18 main::@2
  b2:
  //SEG19 [8] if(*((const byte[]) main::str#0 + (byte) main::i#2)==(byte) ' ') goto main::@4 -- pbuc1_derefidx_vbuxx_eq_vbuc2_then_la1 
    lda str,x
    cmp #' '
    beq b4_from_b2
    jmp b3
  //SEG20 main::@3
  b3:
  //SEG21 [9] *((byte*) main::screen#2) ← *((const byte[]) main::str#0 + (byte) main::i#2) -- _deref_pbuz1=pbuc1_derefidx_vbuxx 
    lda str,x
    ldy #0
    sta (screen),y
  //SEG22 [10] (byte*) main::screen#1 ← ++ (byte*) main::screen#2 -- pbuz1=_inc_pbuz1 
    inc screen
    bne !+
    inc screen+1
  !:
  //SEG23 [11] phi from main::@2 main::@3 to main::@4 [phi:main::@2/main::@3->main::@4]
  b4_from_b2:
  b4_from_b3:
  //SEG24 [11] phi (byte*) main::screen#5 = (byte*) main::screen#2 [phi:main::@2/main::@3->main::@4#0] -- register_copy 
    jmp b4
  //SEG25 main::@4
  b4:
  //SEG26 [12] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuxx=_inc_vbuxx 
    inx
  //SEG27 [13] if((byte) main::i#1==(byte) 0) goto main::@return -- vbuxx_eq_0_then_la1 
    cpx #0
    beq breturn
  //SEG28 [5] phi from main::@4 to main::@1 [phi:main::@4->main::@1]
  b1_from_b4:
  //SEG29 [5] phi (byte*) main::screen#2 = (byte*) main::screen#5 [phi:main::@4->main::@1#0] -- register_copy 
  //SEG30 [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@4->main::@1#1] -- register_copy 
    jmp b1
    str: .text "hello brave new world@"
}

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp b1
Removing instruction jmp bend
Removing instruction jmp b1
Removing instruction jmp breturn
Removing instruction jmp b3
Removing instruction jmp b4
Succesful ASM optimization Pass5NextJumpElimination
Replacing label b4_from_b2 with b4
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction main_from_b1:
Removing instruction bend_from_b1:
Removing instruction b4_from_b2:
Removing instruction b4_from_b3:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction b1_from_main:
Removing instruction b3:
Removing instruction b1_from_b4:
Succesful ASM optimization Pass5UnusedLabelElimination
Updating BasicUpstart to call main directly
Removing instruction jsr main
Succesful ASM optimization Pass5SkipBegin
Removing instruction bbegin:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(void()) main()
(label) main::@1
(label) main::@2
(label) main::@3
(label) main::@4
(label) main::@return
(byte) main::i
(byte) main::i#1 reg byte x 16.5
(byte) main::i#2 reg byte x 9.166666666666666
(byte*) main::screen
(byte*) main::screen#1 screen zp ZP_WORD:2 22.0
(byte*) main::screen#2 screen zp ZP_WORD:2 11.0
(byte*) main::screen#5 screen zp ZP_WORD:2 11.0
(byte[]) main::str
(const byte[]) main::str#0 str = (string) "hello brave new world@"

reg byte x [ main::i#2 main::i#1 ]
zp ZP_WORD:2 [ main::screen#2 main::screen#5 main::screen#1 ]


FINAL ASSEMBLER
Score: 651

//SEG0 File Comments
// Illustrates both break & continue statements in a loop
// Prints a message ending at '@' skipping all spaces
//SEG1 Basic Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
//SEG2 Global Constants & labels
//SEG3 @begin
//SEG4 [1] phi from @begin to @1 [phi:@begin->@1]
//SEG5 @1
//SEG6 [2] call main 
//SEG7 [4] phi from @1 to main [phi:@1->main]
//SEG8 [3] phi from @1 to @end [phi:@1->@end]
//SEG9 @end
//SEG10 main
main: {
    .label screen = 2
  //SEG11 [5] phi from main to main::@1 [phi:main->main::@1]
  //SEG12 [5] phi (byte*) main::screen#2 = (byte*) 1024 [phi:main->main::@1#0] -- pbuz1=pbuc1 
    lda #<$400
    sta screen
    lda #>$400
    sta screen+1
  //SEG13 [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#1] -- vbuxx=vbuc1 
    ldx #0
  //SEG14 main::@1
  b1:
  //SEG15 [6] if(*((const byte[]) main::str#0 + (byte) main::i#2)!=(byte) '@') goto main::@2 -- pbuc1_derefidx_vbuxx_neq_vbuc2_then_la1 
    lda str,x
    cmp #'@'
    bne b2
  //SEG16 main::@return
  breturn:
  //SEG17 [7] return 
    rts
  //SEG18 main::@2
  b2:
  //SEG19 [8] if(*((const byte[]) main::str#0 + (byte) main::i#2)==(byte) ' ') goto main::@4 -- pbuc1_derefidx_vbuxx_eq_vbuc2_then_la1 
    lda str,x
    cmp #' '
    beq b4
  //SEG20 main::@3
  //SEG21 [9] *((byte*) main::screen#2) ← *((const byte[]) main::str#0 + (byte) main::i#2) -- _deref_pbuz1=pbuc1_derefidx_vbuxx 
    lda str,x
    ldy #0
    sta (screen),y
  //SEG22 [10] (byte*) main::screen#1 ← ++ (byte*) main::screen#2 -- pbuz1=_inc_pbuz1 
    inc screen
    bne !+
    inc screen+1
  !:
  //SEG23 [11] phi from main::@2 main::@3 to main::@4 [phi:main::@2/main::@3->main::@4]
  //SEG24 [11] phi (byte*) main::screen#5 = (byte*) main::screen#2 [phi:main::@2/main::@3->main::@4#0] -- register_copy 
  //SEG25 main::@4
  b4:
  //SEG26 [12] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuxx=_inc_vbuxx 
    inx
  //SEG27 [13] if((byte) main::i#1==(byte) 0) goto main::@return -- vbuxx_eq_0_then_la1 
    cpx #0
    beq breturn
  //SEG28 [5] phi from main::@4 to main::@1 [phi:main::@4->main::@1]
  //SEG29 [5] phi (byte*) main::screen#2 = (byte*) main::screen#5 [phi:main::@4->main::@1#0] -- register_copy 
  //SEG30 [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@4->main::@1#1] -- register_copy 
    jmp b1
    str: .text "hello brave new world@"
}