mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-09-29 03:56:15 +00:00
442 lines
12 KiB
Plaintext
442 lines
12 KiB
Plaintext
Setting inferred volatile on symbol affected by address-of (void~) main::$0 ← call sub (byte) 'a' &(byte*) main::screen
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Setting inferred volatile on symbol affected by address-of (void~) main::$1 ← call sub (byte) 'b' &(volatile byte*) main::screen
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Culled Empty Block (label) @1
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CONTROL FLOW GRAPH SSA
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@begin: scope:[] from
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to:@2
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(void()) main()
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main: scope:[main] from @2
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(volatile byte*) main::screen ← (byte*)(number) $400
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(byte) sub::ch#0 ← (byte) 'a'
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(byte**) sub::dst#0 ← &(volatile byte*) main::screen
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call sub
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to:main::@1
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main::@1: scope:[main] from main
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(byte) sub::ch#1 ← (byte) 'b'
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(byte**) sub::dst#1 ← &(volatile byte*) main::screen
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call sub
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to:main::@2
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main::@2: scope:[main] from main::@1
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to:main::@return
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main::@return: scope:[main] from main::@2
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return
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to:@return
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(void()) sub((byte) sub::ch , (byte**) sub::dst)
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sub: scope:[sub] from main main::@1
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(byte**) sub::dst#2 ← phi( main/(byte**) sub::dst#0 main::@1/(byte**) sub::dst#1 )
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(byte) sub::ch#2 ← phi( main/(byte) sub::ch#0 main::@1/(byte) sub::ch#1 )
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*(*((byte**) sub::dst#2)) ← (byte) sub::ch#2
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*((byte**) sub::dst#2) ← ++ *((byte**) sub::dst#2)
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to:sub::@return
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sub::@return: scope:[sub] from sub
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return
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to:@return
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@2: scope:[] from @begin
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call main
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to:@3
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@3: scope:[] from @2
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to:@end
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@end: scope:[] from @3
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SYMBOL TABLE SSA
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(label) @2
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(label) @3
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(label) @begin
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(label) @end
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(void()) main()
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(label) main::@1
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(label) main::@2
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(label) main::@return
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(volatile byte*) main::screen loadstore
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(void()) sub((byte) sub::ch , (byte**) sub::dst)
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(label) sub::@return
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(byte) sub::ch
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(byte) sub::ch#0
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(byte) sub::ch#1
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(byte) sub::ch#2
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(byte**) sub::dst
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(byte**) sub::dst#0
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(byte**) sub::dst#1
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(byte**) sub::dst#2
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Simplifying constant pointer cast (byte*) 1024
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Successful SSA optimization PassNCastSimplification
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Constant (const byte) sub::ch#0 = 'a'
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Constant (const byte**) sub::dst#0 = &main::screen
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Constant (const byte) sub::ch#1 = 'b'
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Constant (const byte**) sub::dst#1 = &main::screen
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Successful SSA optimization Pass2ConstantIdentification
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Inlining constant with var siblings (const byte) sub::ch#0
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Inlining constant with var siblings (const byte**) sub::dst#0
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Inlining constant with var siblings (const byte) sub::ch#1
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Inlining constant with var siblings (const byte**) sub::dst#1
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Constant inlined sub::ch#1 = (byte) 'b'
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Constant inlined sub::ch#0 = (byte) 'a'
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Constant inlined sub::dst#1 = &(volatile byte*) main::screen
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Constant inlined sub::dst#0 = &(volatile byte*) main::screen
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Successful SSA optimization Pass2ConstantInlining
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Identical Phi Values (byte**) sub::dst#2 &(volatile byte*) main::screen
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Successful SSA optimization Pass2IdenticalPhiElimination
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Adding NOP phi() at start of @begin
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Adding NOP phi() at start of @2
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Adding NOP phi() at start of @3
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Adding NOP phi() at start of @end
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Adding NOP phi() at start of main::@1
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Adding NOP phi() at start of main::@2
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CALL GRAPH
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Calls in [] to main:2
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Calls in [main] to sub:6 sub:8
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Created 1 initial phi equivalence classes
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Coalesced down to 1 phi equivalence classes
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Culled Empty Block (label) @3
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Culled Empty Block (label) main::@2
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Renumbering block @2 to @1
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Adding NOP phi() at start of @begin
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Adding NOP phi() at start of @1
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Adding NOP phi() at start of @end
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Adding NOP phi() at start of main::@1
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FINAL CONTROL FLOW GRAPH
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@begin: scope:[] from
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[0] phi()
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to:@1
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@1: scope:[] from @begin
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[1] phi()
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[2] call main
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to:@end
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@end: scope:[] from @1
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[3] phi()
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(void()) main()
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main: scope:[main] from @1
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[4] (volatile byte*) main::screen ← (byte*) 1024
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[5] call sub
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to:main::@1
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main::@1: scope:[main] from main
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[6] phi()
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[7] call sub
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to:main::@return
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main::@return: scope:[main] from main::@1
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[8] return
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to:@return
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(void()) sub((byte) sub::ch , (byte**) sub::dst)
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sub: scope:[sub] from main main::@1
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[9] (byte) sub::ch#2 ← phi( main/(byte) 'a' main::@1/(byte) 'b' )
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[10] *(*(&(volatile byte*) main::screen)) ← (byte) sub::ch#2
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[11] *(&(volatile byte*) main::screen) ← ++ *(&(volatile byte*) main::screen)
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to:sub::@return
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sub::@return: scope:[sub] from sub
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[12] return
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to:@return
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VARIABLE REGISTER WEIGHTS
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(void()) main()
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(volatile byte*) main::screen loadstore 1.5714285714285714
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(void()) sub((byte) sub::ch , (byte**) sub::dst)
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(byte) sub::ch
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(byte) sub::ch#2 101.0
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(byte**) sub::dst
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Initial phi equivalence classes
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[ sub::ch#2 ]
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Added variable main::screen to live range equivalence class [ main::screen ]
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Complete equivalence classes
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[ sub::ch#2 ]
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[ main::screen ]
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Allocated zp[1]:2 [ sub::ch#2 ]
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Allocated zp[2]:3 [ main::screen ]
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INITIAL ASM
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Target platform is c64basic / MOS6502X
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// File Comments
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// Tests (non-)optimization of constant pointers to pointers
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// The two examples of &screen is not detected as identical leading to ASM that could be optimized more
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// Upstart
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.pc = $801 "Basic"
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:BasicUpstart(__bbegin)
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.pc = $80d "Program"
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// Global Constants & labels
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// @begin
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__bbegin:
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// [1] phi from @begin to @1 [phi:@begin->@1]
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__b1_from___bbegin:
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jmp __b1
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// @1
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__b1:
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// [2] call main
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jsr main
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// [3] phi from @1 to @end [phi:@1->@end]
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__bend_from___b1:
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jmp __bend
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// @end
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__bend:
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// main
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main: {
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.label screen = 3
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// [4] (volatile byte*) main::screen ← (byte*) 1024 -- pbuz1=pbuc1
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lda #<$400
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sta.z screen
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lda #>$400
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sta.z screen+1
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// [5] call sub
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// [9] phi from main to sub [phi:main->sub]
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sub_from_main:
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// [9] phi (byte) sub::ch#2 = (byte) 'a' [phi:main->sub#0] -- vbuz1=vbuc1
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lda #'a'
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sta.z sub.ch
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jsr sub
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// [6] phi from main to main::@1 [phi:main->main::@1]
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__b1_from_main:
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jmp __b1
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// main::@1
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__b1:
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// [7] call sub
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// [9] phi from main::@1 to sub [phi:main::@1->sub]
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sub_from___b1:
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// [9] phi (byte) sub::ch#2 = (byte) 'b' [phi:main::@1->sub#0] -- vbuz1=vbuc1
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lda #'b'
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sta.z sub.ch
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jsr sub
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jmp __breturn
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// main::@return
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__breturn:
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// [8] return
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rts
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}
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// sub
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// sub(byte zp(2) ch)
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sub: {
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.label ch = 2
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// [10] *(*(&(volatile byte*) main::screen)) ← (byte) sub::ch#2 -- _deref_(_deref_pptc1)=vbuz1
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lda.z ch
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ldy.z main.screen
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sty.z $fe
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ldy.z main.screen+1
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sty.z $ff
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ldy #0
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sta ($fe),y
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// [11] *(&(volatile byte*) main::screen) ← ++ *(&(volatile byte*) main::screen) -- _deref_pptc1=_inc__deref_pptc1
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inc.z main.screen
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bne !+
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inc.z main.screen+1
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!:
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jmp __breturn
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// sub::@return
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__breturn:
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// [12] return
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rts
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}
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// File Data
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REGISTER UPLIFT POTENTIAL REGISTERS
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Statement [4] (volatile byte*) main::screen ← (byte*) 1024 [ main::screen ] ( main:2 [ main::screen ] { } ) always clobbers reg byte a
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Statement [10] *(*(&(volatile byte*) main::screen)) ← (byte) sub::ch#2 [ main::screen ] ( main:2::sub:5 [ main::screen ] { } main:2::sub:7 [ main::screen ] { } ) always clobbers reg byte y
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Potential registers zp[1]:2 [ sub::ch#2 ] : zp[1]:2 , reg byte a , reg byte x , reg byte y ,
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Potential registers zp[2]:3 [ main::screen ] : zp[2]:3 ,
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REGISTER UPLIFT SCOPES
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Uplift Scope [sub] 101: zp[1]:2 [ sub::ch#2 ]
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Uplift Scope [main] 1.57: zp[2]:3 [ main::screen ]
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Uplift Scope []
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Uplifting [sub] best 91 combination reg byte a [ sub::ch#2 ]
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Uplifting [main] best 91 combination zp[2]:3 [ main::screen ]
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Uplifting [] best 91 combination
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Allocated (was zp[2]:3) zp[2]:2 [ main::screen ]
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ASSEMBLER BEFORE OPTIMIZATION
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// File Comments
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// Tests (non-)optimization of constant pointers to pointers
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// The two examples of &screen is not detected as identical leading to ASM that could be optimized more
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// Upstart
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.pc = $801 "Basic"
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:BasicUpstart(__bbegin)
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.pc = $80d "Program"
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// Global Constants & labels
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// @begin
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__bbegin:
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// [1] phi from @begin to @1 [phi:@begin->@1]
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__b1_from___bbegin:
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jmp __b1
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// @1
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__b1:
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// [2] call main
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jsr main
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// [3] phi from @1 to @end [phi:@1->@end]
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__bend_from___b1:
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jmp __bend
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// @end
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__bend:
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// main
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main: {
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.label screen = 2
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// [4] (volatile byte*) main::screen ← (byte*) 1024 -- pbuz1=pbuc1
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lda #<$400
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sta.z screen
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lda #>$400
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sta.z screen+1
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// [5] call sub
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// [9] phi from main to sub [phi:main->sub]
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sub_from_main:
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// [9] phi (byte) sub::ch#2 = (byte) 'a' [phi:main->sub#0] -- vbuaa=vbuc1
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lda #'a'
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jsr sub
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// [6] phi from main to main::@1 [phi:main->main::@1]
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__b1_from_main:
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jmp __b1
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// main::@1
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__b1:
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// [7] call sub
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// [9] phi from main::@1 to sub [phi:main::@1->sub]
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sub_from___b1:
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// [9] phi (byte) sub::ch#2 = (byte) 'b' [phi:main::@1->sub#0] -- vbuaa=vbuc1
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lda #'b'
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jsr sub
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jmp __breturn
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// main::@return
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__breturn:
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// [8] return
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rts
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}
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// sub
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// sub(byte register(A) ch)
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sub: {
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// [10] *(*(&(volatile byte*) main::screen)) ← (byte) sub::ch#2 -- _deref_(_deref_pptc1)=vbuaa
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ldy.z main.screen
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sty.z $fe
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ldy.z main.screen+1
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sty.z $ff
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ldy #0
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sta ($fe),y
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// [11] *(&(volatile byte*) main::screen) ← ++ *(&(volatile byte*) main::screen) -- _deref_pptc1=_inc__deref_pptc1
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inc.z main.screen
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bne !+
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inc.z main.screen+1
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!:
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jmp __breturn
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// sub::@return
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__breturn:
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// [12] return
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rts
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}
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// File Data
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ASSEMBLER OPTIMIZATIONS
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Removing instruction jmp __b1
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Removing instruction jmp __bend
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Removing instruction jmp __b1
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Removing instruction jmp __breturn
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Removing instruction jmp __breturn
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Succesful ASM optimization Pass5NextJumpElimination
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Removing instruction __b1_from___bbegin:
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Removing instruction __b1:
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Removing instruction __bend_from___b1:
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Removing instruction __b1_from_main:
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Removing instruction sub_from___b1:
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Succesful ASM optimization Pass5RedundantLabelElimination
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Removing instruction __bend:
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Removing instruction sub_from_main:
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Removing instruction __b1:
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Removing instruction __breturn:
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Removing instruction __breturn:
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Succesful ASM optimization Pass5UnusedLabelElimination
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Updating BasicUpstart to call main directly
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Removing instruction jsr main
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Succesful ASM optimization Pass5SkipBegin
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Removing instruction __bbegin:
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Succesful ASM optimization Pass5UnusedLabelElimination
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FINAL SYMBOL TABLE
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(label) @1
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(label) @begin
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(label) @end
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(void()) main()
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(label) main::@1
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(label) main::@return
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(volatile byte*) main::screen loadstore zp[2]:2 1.5714285714285714
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(void()) sub((byte) sub::ch , (byte**) sub::dst)
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(label) sub::@return
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(byte) sub::ch
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(byte) sub::ch#2 reg byte a 101.0
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(byte**) sub::dst
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reg byte a [ sub::ch#2 ]
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zp[2]:2 [ main::screen ]
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FINAL ASSEMBLER
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Score: 70
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// File Comments
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// Tests (non-)optimization of constant pointers to pointers
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// The two examples of &screen is not detected as identical leading to ASM that could be optimized more
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// Upstart
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.pc = $801 "Basic"
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:BasicUpstart(main)
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.pc = $80d "Program"
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// Global Constants & labels
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// @begin
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// [1] phi from @begin to @1 [phi:@begin->@1]
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// @1
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// [2] call main
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// [3] phi from @1 to @end [phi:@1->@end]
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// @end
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// main
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main: {
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.label screen = 2
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// screen = 0x400
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// [4] (volatile byte*) main::screen ← (byte*) 1024 -- pbuz1=pbuc1
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lda #<$400
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sta.z screen
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lda #>$400
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sta.z screen+1
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// sub('a',&screen)
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// [5] call sub
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// [9] phi from main to sub [phi:main->sub]
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// [9] phi (byte) sub::ch#2 = (byte) 'a' [phi:main->sub#0] -- vbuaa=vbuc1
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lda #'a'
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jsr sub
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// [6] phi from main to main::@1 [phi:main->main::@1]
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// main::@1
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// sub('b',&screen)
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// [7] call sub
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// [9] phi from main::@1 to sub [phi:main::@1->sub]
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// [9] phi (byte) sub::ch#2 = (byte) 'b' [phi:main::@1->sub#0] -- vbuaa=vbuc1
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lda #'b'
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jsr sub
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// main::@return
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// }
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// [8] return
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rts
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}
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// sub
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// sub(byte register(A) ch)
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sub: {
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// *(*dst)++ = ch
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// [10] *(*(&(volatile byte*) main::screen)) ← (byte) sub::ch#2 -- _deref_(_deref_pptc1)=vbuaa
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ldy.z main.screen
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sty.z $fe
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ldy.z main.screen+1
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sty.z $ff
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ldy #0
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sta ($fe),y
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// *(*dst)++ = ch;
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// [11] *(&(volatile byte*) main::screen) ← ++ *(&(volatile byte*) main::screen) -- _deref_pptc1=_inc__deref_pptc1
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inc.z main.screen
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bne !+
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inc.z main.screen+1
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!:
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// sub::@return
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// }
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// [12] return
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rts
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}
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// File Data
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