mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-09-29 03:56:15 +00:00
315 lines
8.2 KiB
Plaintext
315 lines
8.2 KiB
Plaintext
Setting inferred volatile on symbol affected by address-of main::pscreen = &main::screen
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CONTROL FLOW GRAPH SSA
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void main()
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main: scope:[main] from __start
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main::screen = (byte*)$400
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sub::ch#0 = 'a'
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sub::dst#0 = main::pscreen
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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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sub::ch#1 = 'b'
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sub::dst#1 = main::pscreen
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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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sub::dst#2 = phi( main/sub::dst#0, main::@1/sub::dst#1 )
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sub::ch#2 = phi( main/sub::ch#0, main::@1/sub::ch#1 )
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*(*sub::dst#2) = sub::ch#2
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*sub::dst#2 = ++ *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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void __start()
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__start: scope:[__start] from
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call main
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to:__start::@1
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__start::@1: scope:[__start] from __start
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to:__start::@return
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__start::@return: scope:[__start] from __start::@1
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return
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to:@return
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SYMBOL TABLE SSA
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void __start()
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void main()
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const byte** main::pscreen = &main::screen
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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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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 sub::ch#0 = 'a'
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Constant sub::dst#0 = main::pscreen
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Constant sub::ch#1 = 'b'
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Constant sub::dst#1 = main::pscreen
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Successful SSA optimization Pass2ConstantIdentification
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Removing unused procedure __start
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Removing unused procedure block __start
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Removing unused procedure block __start::@1
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Removing unused procedure block __start::@return
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Successful SSA optimization PassNEliminateEmptyStart
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Inlining constant with var siblings sub::ch#0
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Inlining constant with var siblings sub::dst#0
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Inlining constant with var siblings sub::ch#1
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Inlining constant with var siblings sub::dst#1
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Constant inlined sub::ch#1 = 'b'
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Constant inlined sub::ch#0 = 'a'
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Constant inlined sub::dst#1 = main::pscreen
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Constant inlined sub::dst#0 = main::pscreen
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Successful SSA optimization Pass2ConstantInlining
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Identical Phi Values sub::dst#2 main::pscreen
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Successful SSA optimization Pass2IdenticalPhiElimination
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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 [main] to sub:1 sub:3
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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 main::@2
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Adding NOP phi() at start of main::@1
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FINAL CONTROL FLOW GRAPH
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void main()
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main: scope:[main] from
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[0] main::screen = (byte*) 1024
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[1] call sub
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to:main::@1
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main::@1: scope:[main] from main
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[2] phi()
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[3] call sub
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to:main::@return
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main::@return: scope:[main] from main::@1
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[4] 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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[5] sub::ch#2 = phi( main/'a', main::@1/'b' )
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[6] *(*main::pscreen) = sub::ch#2
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[7] *main::pscreen = ++ *main::pscreen
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to:sub::@return
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sub::@return: scope:[sub] from sub
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[8] 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 20.0
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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 11.0
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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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REGISTER UPLIFT POTENTIAL REGISTERS
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Statement [0] main::screen = (byte*) 1024 [ ] ( [ ] { } ) always clobbers reg byte a
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Statement [6] *(*main::pscreen) = sub::ch#2 [ ] ( sub:1 [ ] { } sub:3 [ ] { } ) 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 [main] 20: zp[2]:3 [ main::screen ]
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Uplift Scope [sub] 11: zp[1]:2 [ sub::ch#2 ]
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Uplift Scope []
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Uplifting [main] best 88 combination zp[2]:3 [ main::screen ]
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Uplifting [sub] best 79 combination reg byte a [ sub::ch#2 ]
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Uplifting [] best 79 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 optimization of constant pointers to pointers
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// Upstart
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// Commodore 64 PRG executable file
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.file [name="ptrptr-optimize-1.prg", type="prg", segments="Program"]
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.segmentdef Program [segments="Basic, Code, Data"]
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.segmentdef Basic [start=$0801]
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.segmentdef Code [start=$80d]
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.segmentdef Data [startAfter="Code"]
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.segment Basic
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:BasicUpstart(main)
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// Global Constants & labels
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.segment Code
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// main
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main: {
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.label pscreen = screen
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.label screen = 2
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// [0] 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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// [1] call sub
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// [5] phi from main to sub [phi:main->sub]
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sub_from_main:
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// [5] phi sub::ch#2 = 'a' [phi:main->sub#0] -- vbuaa=vbuc1
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lda #'a'
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jsr sub
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// [2] 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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// [3] call sub
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// [5] phi from main::@1 to sub [phi:main::@1->sub]
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sub_from___b1:
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// [5] phi sub::ch#2 = '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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// [4] 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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// [6] *(*main::pscreen) = sub::ch#2 -- _deref_(_deref_qbuc1)=vbuaa
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ldy.z main.pscreen
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sty.z $fe
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ldy.z main.pscreen+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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// [7] *main::pscreen = ++ *main::pscreen -- _deref_qbuc1=_inc__deref_qbuc1
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inc.z main.pscreen
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bne !+
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inc.z main.pscreen+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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// [8] 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 __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_main:
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Removing instruction sub_from___b1:
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Succesful ASM optimization Pass5RedundantLabelElimination
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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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FINAL SYMBOL TABLE
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void main()
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const byte** main::pscreen = &main::screen
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volatile byte* main::screen loadstore zp[2]:2 20.0
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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 reg byte a 11.0
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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 optimization of constant pointers to pointers
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// Upstart
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// Commodore 64 PRG executable file
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.file [name="ptrptr-optimize-1.prg", type="prg", segments="Program"]
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.segmentdef Program [segments="Basic, Code, Data"]
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.segmentdef Basic [start=$0801]
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.segmentdef Code [start=$80d]
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.segmentdef Data [startAfter="Code"]
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.segment Basic
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:BasicUpstart(main)
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// Global Constants & labels
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.segment Code
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// main
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main: {
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.label pscreen = screen
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.label screen = 2
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// screen = 0x400
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// [0] 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',pscreen)
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// [1] call sub
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// [5] phi from main to sub [phi:main->sub]
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// [5] phi sub::ch#2 = 'a' [phi:main->sub#0] -- vbuaa=vbuc1
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lda #'a'
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jsr sub
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// [2] phi from main to main::@1 [phi:main->main::@1]
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// main::@1
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// sub('b',pscreen)
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// [3] call sub
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// [5] phi from main::@1 to sub [phi:main::@1->sub]
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// [5] phi sub::ch#2 = '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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// [4] 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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// [6] *(*main::pscreen) = sub::ch#2 -- _deref_(_deref_qbuc1)=vbuaa
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ldy.z main.pscreen
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sty.z $fe
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ldy.z main.pscreen+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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// [7] *main::pscreen = ++ *main::pscreen -- _deref_qbuc1=_inc__deref_qbuc1
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inc.z main.pscreen
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bne !+
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inc.z main.pscreen+1
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!:
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// sub::@return
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// }
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// [8] return
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rts
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}
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// File Data
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