Culled Empty Block (label) @1
Culled Empty Block (label) line::@4
Culled Empty Block (label) line::@3
Culled Empty Block (label) line::@5
Culled Empty Block (label) line::@6

CONTROL FLOW GRAPH SSA
@begin: scope:[]  from
  (byte*) screen#0 ← ((byte*)) (number) $400
  to:@2
main: scope:[main]  from @2
  (byte*) screen#13 ← phi( @2/(byte*) screen#15 )
  (byte) line::x0#0 ← (number) 1
  (byte) line::x1#0 ← (number) 2
  call line 
  to:main::@1
main::@1: scope:[main]  from main
  (byte*) screen#7 ← phi( main/(byte*) screen#5 )
  (byte*) screen#1 ← (byte*) screen#7
  (byte) line::x0#1 ← (number) 3
  (byte) line::x1#1 ← (number) 5
  call line 
  to:main::@2
main::@2: scope:[main]  from main::@1
  (byte*) screen#8 ← phi( main::@1/(byte*) screen#5 )
  (byte*) screen#2 ← (byte*) screen#8
  to:main::@return
main::@return: scope:[main]  from main::@2
  (byte*) screen#9 ← phi( main::@2/(byte*) screen#2 )
  (byte*) screen#3 ← (byte*) screen#9
  return 
  to:@return
line: scope:[line]  from main main::@1
  (byte*) screen#16 ← phi( main/(byte*) screen#13 main::@1/(byte*) screen#1 )
  (byte) line::x1#3 ← phi( main/(byte) line::x1#0 main::@1/(byte) line::x1#1 )
  (byte) line::x0#2 ← phi( main/(byte) line::x0#0 main::@1/(byte) line::x0#1 )
  (byte) line::x#0 ← (byte) line::x0#2
  to:line::@1
line::@1: scope:[line]  from line line::@2
  (byte*) screen#14 ← phi( line/(byte*) screen#16 line::@2/(byte*) screen#4 )
  (byte) line::x1#2 ← phi( line/(byte) line::x1#3 line::@2/(byte) line::x1#4 )
  (byte) line::x#2 ← phi( line/(byte) line::x#0 line::@2/(byte) line::x#1 )
  (bool~) line::$0 ← (byte) line::x#2 < (byte) line::x1#2
  if((bool~) line::$0) goto line::@2
  to:line::@return
line::@2: scope:[line]  from line::@1
  (byte) line::x1#4 ← phi( line::@1/(byte) line::x1#2 )
  (byte*) screen#10 ← phi( line::@1/(byte*) screen#14 )
  (byte) line::x#3 ← phi( line::@1/(byte) line::x#2 )
  *((byte*) screen#10) ← (byte) line::x#3
  (byte*) screen#4 ← ++ (byte*) screen#10
  (byte) line::x#1 ← ++ (byte) line::x#3
  to:line::@1
line::@return: scope:[line]  from line::@1
  (byte*) screen#11 ← phi( line::@1/(byte*) screen#14 )
  (byte*) screen#5 ← (byte*) screen#11
  return 
  to:@return
@2: scope:[]  from @begin
  (byte*) screen#15 ← phi( @begin/(byte*) screen#0 )
  call main 
  to:@3
@3: scope:[]  from @2
  (byte*) screen#12 ← phi( @2/(byte*) screen#3 )
  (byte*) screen#6 ← (byte*) screen#12
  to:@end
@end: scope:[]  from @3

SYMBOL TABLE SSA
(label) @2
(label) @3
(label) @begin
(label) @end
(void()) line((byte) line::x0 , (byte) line::x1)
(bool~) line::$0
(label) line::@1
(label) line::@2
(label) line::@return
(byte) line::x
(byte) line::x#0
(byte) line::x#1
(byte) line::x#2
(byte) line::x#3
(byte) line::x0
(byte) line::x0#0
(byte) line::x0#1
(byte) line::x0#2
(byte) line::x1
(byte) line::x1#0
(byte) line::x1#1
(byte) line::x1#2
(byte) line::x1#3
(byte) line::x1#4
(void()) main()
(label) main::@1
(label) main::@2
(label) main::@return
(byte*) screen
(byte*) screen#0
(byte*) screen#1
(byte*) screen#10
(byte*) screen#11
(byte*) screen#12
(byte*) screen#13
(byte*) screen#14
(byte*) screen#15
(byte*) screen#16
(byte*) screen#2
(byte*) screen#3
(byte*) screen#4
(byte*) screen#5
(byte*) screen#6
(byte*) screen#7
(byte*) screen#8
(byte*) screen#9

Adding number conversion cast (unumber) 1 in (byte) line::x0#0 ← (number) 1
Adding number conversion cast (unumber) 2 in (byte) line::x1#0 ← (number) 2
Adding number conversion cast (unumber) 3 in (byte) line::x0#1 ← (number) 3
Adding number conversion cast (unumber) 5 in (byte) line::x1#1 ← (number) 5
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte*) screen#0 ← (byte*)(number) $400
Inlining cast (byte) line::x0#0 ← (unumber)(number) 1
Inlining cast (byte) line::x1#0 ← (unumber)(number) 2
Inlining cast (byte) line::x0#1 ← (unumber)(number) 3
Inlining cast (byte) line::x1#1 ← (unumber)(number) 5
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 1
Simplifying constant integer cast 2
Simplifying constant integer cast 3
Simplifying constant integer cast 5
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 1
Finalized unsigned number type (byte) 2
Finalized unsigned number type (byte) 3
Finalized unsigned number type (byte) 5
Successful SSA optimization PassNFinalizeNumberTypeConversions
Alias (byte*) screen#1 = (byte*) screen#7 
Alias (byte*) screen#2 = (byte*) screen#8 (byte*) screen#9 (byte*) screen#3 
Alias (byte) line::x#0 = (byte) line::x0#2 
Alias (byte) line::x#2 = (byte) line::x#3 
Alias (byte*) screen#10 = (byte*) screen#14 (byte*) screen#11 (byte*) screen#5 
Alias (byte) line::x1#2 = (byte) line::x1#4 
Alias (byte*) screen#0 = (byte*) screen#15 
Alias (byte*) screen#12 = (byte*) screen#6 
Successful SSA optimization Pass2AliasElimination
Identical Phi Values (byte*) screen#13 (byte*) screen#0
Identical Phi Values (byte*) screen#1 (byte*) screen#10
Identical Phi Values (byte*) screen#2 (byte*) screen#10
Identical Phi Values (byte) line::x1#2 (byte) line::x1#3
Identical Phi Values (byte*) screen#12 (byte*) screen#2
Successful SSA optimization Pass2IdenticalPhiElimination
Simple Condition (bool~) line::$0 [19] if((byte) line::x#2<(byte) line::x1#3) goto line::@2
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant (const byte*) screen#0 = (byte*) 1024
Constant (const byte) line::x0#0 = 1
Constant (const byte) line::x1#0 = 2
Constant (const byte) line::x0#1 = 3
Constant (const byte) line::x1#1 = 5
Successful SSA optimization Pass2ConstantIdentification
Inlining constant with different constant siblings (const byte) line::x0#0
Inlining constant with var siblings (const byte) line::x1#0
Inlining constant with different constant siblings (const byte) line::x0#1
Inlining constant with var siblings (const byte) line::x1#1
Inlining constant with var siblings (const byte*) screen#0
Constant inlined line::x0#0 = (byte) 1
Constant inlined line::x1#1 = (byte) 5
Constant inlined screen#0 = (byte*) 1024
Constant inlined line::x1#0 = (byte) 2
Constant inlined line::x0#1 = (byte) 3
Successful SSA optimization Pass2ConstantInlining
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @2
Adding NOP phi() at start of @3
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
Adding NOP phi() at start of main::@2
CALL GRAPH
Calls in [] to main:2 
Calls in [main] to line:6 line:8 

Created 5 initial phi equivalence classes
Coalesced [7] screen#17 ← screen#10
Coalesced [12] line::x#4 ← line::x#0
Coalesced (already) [13] screen#18 ← screen#16
Coalesced [20] line::x#5 ← line::x#1
Coalesced [21] screen#19 ← screen#4
Coalesced down to 3 phi equivalence classes
Culled Empty Block (label) @3
Culled Empty Block (label) main::@2
Renumbering block @2 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
Adding NOP phi() at start of main::@1

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()
  [5] call line 
  to:main::@1
main::@1: scope:[main]  from main
  [6] phi()
  [7] call line 
  to:main::@return
main::@return: scope:[main]  from main::@1
  [8] return 
  to:@return
line: scope:[line]  from main main::@1
  [9] (byte*) screen#16 ← phi( main/(byte*) 1024 main::@1/(byte*) screen#10 )
  [9] (byte) line::x1#3 ← phi( main/(byte) 2 main::@1/(byte) 5 )
  [9] (byte) line::x#0 ← phi( main/(byte) 1 main::@1/(byte) 3 )
  to:line::@1
line::@1: scope:[line]  from line line::@2
  [10] (byte*) screen#10 ← phi( line/(byte*) screen#16 line::@2/(byte*) screen#4 )
  [10] (byte) line::x#2 ← phi( line/(byte) line::x#0 line::@2/(byte) line::x#1 )
  [11] if((byte) line::x#2<(byte) line::x1#3) goto line::@2
  to:line::@return
line::@return: scope:[line]  from line::@1
  [12] return 
  to:@return
line::@2: scope:[line]  from line::@1
  [13] *((byte*) screen#10) ← (byte) line::x#2
  [14] (byte*) screen#4 ← ++ (byte*) screen#10
  [15] (byte) line::x#1 ← ++ (byte) line::x#2
  to:line::@1


VARIABLE REGISTER WEIGHTS
(void()) line((byte) line::x0 , (byte) line::x1)
(byte) line::x
(byte) line::x#0 2.0
(byte) line::x#1 22.0
(byte) line::x#2 11.5
(byte) line::x0
(byte) line::x1
(byte) line::x1#3 1.8333333333333333
(void()) main()
(byte*) screen
(byte*) screen#10 6.166666666666666
(byte*) screen#16 4.0
(byte*) screen#4 11.0

Initial phi equivalence classes
[ line::x1#3 ]
[ screen#16 screen#10 screen#4 ]
[ line::x#2 line::x#0 line::x#1 ]
Complete equivalence classes
[ line::x1#3 ]
[ screen#16 screen#10 screen#4 ]
[ line::x#2 line::x#0 line::x#1 ]
Allocated zp ZP_BYTE:2 [ line::x1#3 ]
Allocated zp ZP_WORD:3 [ screen#16 screen#10 screen#4 ]
Allocated zp ZP_BYTE:5 [ line::x#2 line::x#0 line::x#1 ]

INITIAL ASM
Target platform is c64basic
  // File Comments
// Multiple calls with different (constant?) parameters should yield different values at runtime
// Currently the same constant parameter is passed on every call.
// Reason: Multiple versioned parameter constants x0#0, x0#1 are only output as a single constant in the ASM .const x0 = 0
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label screen = 3
  // @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: {
    // [5] call line 
    // [9] phi from main to line [phi:main->line]
  line_from_main:
    // [9] phi (byte*) screen#16 = (byte*) 1024 [phi:main->line#0] -- pbuz1=pbuc1 
    lda #<$400
    sta.z screen
    lda #>$400
    sta.z screen+1
    // [9] phi (byte) line::x1#3 = (byte) 2 [phi:main->line#1] -- vbuz1=vbuc1 
    lda #2
    sta.z line.x1
    // [9] phi (byte) line::x#0 = (byte) 1 [phi:main->line#2] -- vbuz1=vbuc1 
    lda #1
    sta.z line.x
    jsr line
    // [6] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
    jmp b1
    // main::@1
  b1:
    // [7] call line 
    // [9] phi from main::@1 to line [phi:main::@1->line]
  line_from_b1:
    // [9] phi (byte*) screen#16 = (byte*) screen#10 [phi:main::@1->line#0] -- register_copy 
    // [9] phi (byte) line::x1#3 = (byte) 5 [phi:main::@1->line#1] -- vbuz1=vbuc1 
    lda #5
    sta.z line.x1
    // [9] phi (byte) line::x#0 = (byte) 3 [phi:main::@1->line#2] -- vbuz1=vbuc1 
    lda #3
    sta.z line.x
    jsr line
    jmp breturn
    // main::@return
  breturn:
    // [8] return 
    rts
}
  // line
// line(byte zeropage(2) x1)
line: {
    .label x = 5
    .label x1 = 2
    // [10] phi from line line::@2 to line::@1 [phi:line/line::@2->line::@1]
  b1_from_line:
  b1_from_b2:
    // [10] phi (byte*) screen#10 = (byte*) screen#16 [phi:line/line::@2->line::@1#0] -- register_copy 
    // [10] phi (byte) line::x#2 = (byte) line::x#0 [phi:line/line::@2->line::@1#1] -- register_copy 
    jmp b1
    // line::@1
  b1:
    // [11] if((byte) line::x#2<(byte) line::x1#3) goto line::@2 -- vbuz1_lt_vbuz2_then_la1 
    lda.z x
    cmp.z x1
    bcc b2
    jmp breturn
    // line::@return
  breturn:
    // [12] return 
    rts
    // line::@2
  b2:
    // [13] *((byte*) screen#10) ← (byte) line::x#2 -- _deref_pbuz1=vbuz2 
    lda.z x
    ldy #0
    sta (screen),y
    // [14] (byte*) screen#4 ← ++ (byte*) screen#10 -- pbuz1=_inc_pbuz1 
    inc.z screen
    bne !+
    inc.z screen+1
  !:
    // [15] (byte) line::x#1 ← ++ (byte) line::x#2 -- vbuz1=_inc_vbuz1 
    inc.z x
    jmp b1_from_b2
}
  // File Data

REGISTER UPLIFT POTENTIAL REGISTERS
Statement [13] *((byte*) screen#10) ← (byte) line::x#2 [ line::x1#3 screen#10 line::x#2 ] ( main:2::line:5 [ line::x1#3 screen#10 line::x#2 ] main:2::line:7 [ line::x1#3 screen#10 line::x#2 ] ) always clobbers reg byte y 
Removing always clobbered register reg byte y as potential for zp ZP_BYTE:2 [ line::x1#3 ]
Removing always clobbered register reg byte y as potential for zp ZP_BYTE:5 [ line::x#2 line::x#0 line::x#1 ]
Statement [13] *((byte*) screen#10) ← (byte) line::x#2 [ line::x1#3 screen#10 line::x#2 ] ( main:2::line:5 [ line::x1#3 screen#10 line::x#2 ] main:2::line:7 [ line::x1#3 screen#10 line::x#2 ] ) always clobbers reg byte y 
Potential registers zp ZP_BYTE:2 [ line::x1#3 ] : zp ZP_BYTE:2 , reg byte a , reg byte x , 
Potential registers zp ZP_WORD:3 [ screen#16 screen#10 screen#4 ] : zp ZP_WORD:3 , 
Potential registers zp ZP_BYTE:5 [ line::x#2 line::x#0 line::x#1 ] : zp ZP_BYTE:5 , reg byte a , reg byte x , 

REGISTER UPLIFT SCOPES
Uplift Scope [line] 35.5: zp ZP_BYTE:5 [ line::x#2 line::x#0 line::x#1 ] 1.83: zp ZP_BYTE:2 [ line::x1#3 ] 
Uplift Scope [] 21.17: zp ZP_WORD:3 [ screen#16 screen#10 screen#4 ] 
Uplift Scope [main] 

Uplifting [line] best 456 combination reg byte x [ line::x#2 line::x#0 line::x#1 ] zp ZP_BYTE:2 [ line::x1#3 ] 
Uplifting [] best 456 combination zp ZP_WORD:3 [ screen#16 screen#10 screen#4 ] 
Uplifting [main] best 456 combination 
Attempting to uplift remaining variables inzp ZP_BYTE:2 [ line::x1#3 ]
Uplifting [line] best 456 combination zp ZP_BYTE:2 [ line::x1#3 ] 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Multiple calls with different (constant?) parameters should yield different values at runtime
// Currently the same constant parameter is passed on every call.
// Reason: Multiple versioned parameter constants x0#0, x0#1 are only output as a single constant in the ASM .const x0 = 0
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
  // Global Constants & labels
  .label screen = 3
  // @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: {
    // [5] call line 
    // [9] phi from main to line [phi:main->line]
  line_from_main:
    // [9] phi (byte*) screen#16 = (byte*) 1024 [phi:main->line#0] -- pbuz1=pbuc1 
    lda #<$400
    sta.z screen
    lda #>$400
    sta.z screen+1
    // [9] phi (byte) line::x1#3 = (byte) 2 [phi:main->line#1] -- vbuz1=vbuc1 
    lda #2
    sta.z line.x1
    // [9] phi (byte) line::x#0 = (byte) 1 [phi:main->line#2] -- vbuxx=vbuc1 
    ldx #1
    jsr line
    // [6] phi from main to main::@1 [phi:main->main::@1]
  b1_from_main:
    jmp b1
    // main::@1
  b1:
    // [7] call line 
    // [9] phi from main::@1 to line [phi:main::@1->line]
  line_from_b1:
    // [9] phi (byte*) screen#16 = (byte*) screen#10 [phi:main::@1->line#0] -- register_copy 
    // [9] phi (byte) line::x1#3 = (byte) 5 [phi:main::@1->line#1] -- vbuz1=vbuc1 
    lda #5
    sta.z line.x1
    // [9] phi (byte) line::x#0 = (byte) 3 [phi:main::@1->line#2] -- vbuxx=vbuc1 
    ldx #3
    jsr line
    jmp breturn
    // main::@return
  breturn:
    // [8] return 
    rts
}
  // line
// line(byte zeropage(2) x1)
line: {
    .label x1 = 2
    // [10] phi from line line::@2 to line::@1 [phi:line/line::@2->line::@1]
  b1_from_line:
  b1_from_b2:
    // [10] phi (byte*) screen#10 = (byte*) screen#16 [phi:line/line::@2->line::@1#0] -- register_copy 
    // [10] phi (byte) line::x#2 = (byte) line::x#0 [phi:line/line::@2->line::@1#1] -- register_copy 
    jmp b1
    // line::@1
  b1:
    // [11] if((byte) line::x#2<(byte) line::x1#3) goto line::@2 -- vbuxx_lt_vbuz1_then_la1 
    cpx.z x1
    bcc b2
    jmp breturn
    // line::@return
  breturn:
    // [12] return 
    rts
    // line::@2
  b2:
    // [13] *((byte*) screen#10) ← (byte) line::x#2 -- _deref_pbuz1=vbuxx 
    txa
    ldy #0
    sta (screen),y
    // [14] (byte*) screen#4 ← ++ (byte*) screen#10 -- pbuz1=_inc_pbuz1 
    inc.z screen
    bne !+
    inc.z screen+1
  !:
    // [15] (byte) line::x#1 ← ++ (byte) line::x#2 -- vbuxx=_inc_vbuxx 
    inx
    jmp b1_from_b2
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp b1
Removing instruction jmp bend
Removing instruction jmp b1
Removing instruction jmp breturn
Removing instruction jmp b1
Removing instruction jmp breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing label b1_from_b2 with b1
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction main_from_b1:
Removing instruction bend_from_b1:
Removing instruction b1_from_main:
Removing instruction line_from_b1:
Removing instruction b1_from_line:
Removing instruction b1_from_b2:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction line_from_main:
Removing instruction b1:
Removing instruction breturn:
Removing instruction breturn:
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()) line((byte) line::x0 , (byte) line::x1)
(label) line::@1
(label) line::@2
(label) line::@return
(byte) line::x
(byte) line::x#0 reg byte x 2.0
(byte) line::x#1 reg byte x 22.0
(byte) line::x#2 reg byte x 11.5
(byte) line::x0
(byte) line::x1
(byte) line::x1#3 x1 zp ZP_BYTE:2 1.8333333333333333
(void()) main()
(label) main::@1
(label) main::@return
(byte*) screen
(byte*) screen#10 screen zp ZP_WORD:3 6.166666666666666
(byte*) screen#16 screen zp ZP_WORD:3 4.0
(byte*) screen#4 screen zp ZP_WORD:3 11.0

zp ZP_BYTE:2 [ line::x1#3 ]
zp ZP_WORD:3 [ screen#16 screen#10 screen#4 ]
reg byte x [ line::x#2 line::x#0 line::x#1 ]


FINAL ASSEMBLER
Score: 378

  // File Comments
// Multiple calls with different (constant?) parameters should yield different values at runtime
// Currently the same constant parameter is passed on every call.
// Reason: Multiple versioned parameter constants x0#0, x0#1 are only output as a single constant in the ASM .const x0 = 0
  // Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
  // Global Constants & labels
  .label screen = 3
  // @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: {
    // line(1,2)
    // [5] call line 
    // [9] phi from main to line [phi:main->line]
    // [9] phi (byte*) screen#16 = (byte*) 1024 [phi:main->line#0] -- pbuz1=pbuc1 
    lda #<$400
    sta.z screen
    lda #>$400
    sta.z screen+1
    // [9] phi (byte) line::x1#3 = (byte) 2 [phi:main->line#1] -- vbuz1=vbuc1 
    lda #2
    sta.z line.x1
    // [9] phi (byte) line::x#0 = (byte) 1 [phi:main->line#2] -- vbuxx=vbuc1 
    ldx #1
    jsr line
    // [6] phi from main to main::@1 [phi:main->main::@1]
    // main::@1
    // line(3,5)
    // [7] call line 
    // [9] phi from main::@1 to line [phi:main::@1->line]
    // [9] phi (byte*) screen#16 = (byte*) screen#10 [phi:main::@1->line#0] -- register_copy 
    // [9] phi (byte) line::x1#3 = (byte) 5 [phi:main::@1->line#1] -- vbuz1=vbuc1 
    lda #5
    sta.z line.x1
    // [9] phi (byte) line::x#0 = (byte) 3 [phi:main::@1->line#2] -- vbuxx=vbuc1 
    ldx #3
    jsr line
    // main::@return
    // }
    // [8] return 
    rts
}
  // line
// line(byte zeropage(2) x1)
line: {
    .label x1 = 2
    // [10] phi from line line::@2 to line::@1 [phi:line/line::@2->line::@1]
    // [10] phi (byte*) screen#10 = (byte*) screen#16 [phi:line/line::@2->line::@1#0] -- register_copy 
    // [10] phi (byte) line::x#2 = (byte) line::x#0 [phi:line/line::@2->line::@1#1] -- register_copy 
    // line::@1
  b1:
    // for(byte x  = x0; x<x1; x++)
    // [11] if((byte) line::x#2<(byte) line::x1#3) goto line::@2 -- vbuxx_lt_vbuz1_then_la1 
    cpx.z x1
    bcc b2
    // line::@return
    // }
    // [12] return 
    rts
    // line::@2
  b2:
    // *screen = x
    // [13] *((byte*) screen#10) ← (byte) line::x#2 -- _deref_pbuz1=vbuxx 
    txa
    ldy #0
    sta (screen),y
    // screen++;
    // [14] (byte*) screen#4 ← ++ (byte*) screen#10 -- pbuz1=_inc_pbuz1 
    inc.z screen
    bne !+
    inc.z screen+1
  !:
    // for(byte x  = x0; x<x1; x++)
    // [15] (byte) line::x#1 ← ++ (byte) line::x#2 -- vbuxx=_inc_vbuxx 
    inx
    jmp b1
}
  // File Data

