mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-09-29 03:56:15 +00:00
493 lines
15 KiB
Plaintext
493 lines
15 KiB
Plaintext
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CONTROL FLOW GRAPH SSA
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@begin: scope:[] from
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to:@1
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(void()) main()
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main: scope:[main] from @1
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(byte) main::a#0 ← (byte) $80
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(byte) main::b#0 ← (byte) 2
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to:main::@1
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main::@1: scope:[main] from main main::@4 main::@5
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(byte) main::b#2 ← phi( main/(byte) main::b#0 main::@4/(byte) main::b#4 main::@5/(byte) main::b#1 )
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(byte) main::a#2 ← phi( main/(byte) main::a#0 main::@4/(byte) main::a#1 main::@5/(byte) main::a#6 )
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(bool~) main::$0 ← (byte) main::a#2 != (byte) main::b#2
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if((bool~) main::$0) goto main::@2
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to:main::@3
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main::@2: scope:[main] from main::@1
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(byte) main::b#3 ← phi( main::@1/(byte) main::b#2 )
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(byte) main::a#3 ← phi( main::@1/(byte) main::a#2 )
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(bool~) main::$1 ← (byte) main::a#3 > (byte) main::b#3
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if((bool~) main::$1) goto main::@4
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to:main::@5
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main::@3: scope:[main] from main::@1
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(byte) main::a#4 ← phi( main::@1/(byte) main::a#2 )
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*((const byte*) SCREEN) ← (byte) main::a#4
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to:main::@return
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main::@4: scope:[main] from main::@2
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(byte) main::b#4 ← phi( main::@2/(byte) main::b#3 )
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(byte) main::a#5 ← phi( main::@2/(byte) main::a#3 )
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(byte~) main::$3 ← (byte) main::a#5 - (byte) main::b#4
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(byte) main::a#1 ← (byte~) main::$3
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to:main::@1
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main::@5: scope:[main] from main::@2
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(byte) main::a#6 ← phi( main::@2/(byte) main::a#3 )
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(byte) main::b#5 ← phi( main::@2/(byte) main::b#3 )
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(byte~) main::$2 ← (byte) main::b#5 - (byte) main::a#6
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(byte) main::b#1 ← (byte~) main::$2
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to:main::@1
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main::@return: scope:[main] from main::@3
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return
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to:@return
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@1: scope:[] from @begin
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call main
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to:@2
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@2: scope:[] from @1
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to:@end
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@end: scope:[] from @2
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SYMBOL TABLE SSA
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(label) @1
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(label) @2
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(label) @begin
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(label) @end
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(const byte*) SCREEN = (byte*)(number) $400
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(void()) main()
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(bool~) main::$0
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(bool~) main::$1
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(byte~) main::$2
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(byte~) main::$3
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(label) main::@1
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(label) main::@2
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(label) main::@3
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(label) main::@4
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(label) main::@5
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(label) main::@return
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(byte) main::a
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(byte) main::a#0
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(byte) main::a#1
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(byte) main::a#2
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(byte) main::a#3
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(byte) main::a#4
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(byte) main::a#5
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(byte) main::a#6
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(byte) main::b
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(byte) main::b#0
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(byte) main::b#1
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(byte) main::b#2
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(byte) main::b#3
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(byte) main::b#4
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(byte) main::b#5
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Simplifying constant pointer cast (byte*) 1024
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Successful SSA optimization PassNCastSimplification
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Alias main::a#2 = main::a#3 main::a#4 main::a#5 main::a#6
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Alias main::b#2 = main::b#3 main::b#4 main::b#5
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Alias main::a#1 = main::$3
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Alias main::b#1 = main::$2
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Successful SSA optimization Pass2AliasElimination
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Simple Condition (bool~) main::$0 [4] if((byte) main::a#2!=(byte) main::b#2) goto main::@2
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Simple Condition (bool~) main::$1 [6] if((byte) main::a#2>(byte) main::b#2) goto main::@4
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Successful SSA optimization Pass2ConditionalJumpSimplification
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Constant (const byte) main::a#0 = $80
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Constant (const byte) main::b#0 = 2
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Successful SSA optimization Pass2ConstantIdentification
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Inlining constant with var siblings (const byte) main::a#0
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Inlining constant with var siblings (const byte) main::b#0
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Constant inlined main::a#0 = (byte) $80
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Constant inlined main::b#0 = (byte) 2
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Successful SSA optimization Pass2ConstantInlining
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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 @2
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Adding NOP phi() at start of @end
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Adding NOP phi() at start of main
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CALL GRAPH
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Calls in [] to main:2
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Created 2 initial phi equivalence classes
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Coalesced (already) [12] main::a#8 ← main::a#2
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Coalesced [13] main::b#7 ← main::b#1
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Coalesced [15] main::a#7 ← main::a#1
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Coalesced (already) [16] main::b#6 ← main::b#2
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Coalesced down to 2 phi equivalence classes
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Culled Empty Block (label) @2
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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
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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] phi()
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to:main::@1
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main::@1: scope:[main] from main main::@4 main::@5
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[5] (byte) main::b#2 ← phi( main/(byte) 2 main::@4/(byte) main::b#2 main::@5/(byte) main::b#1 )
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[5] (byte) main::a#2 ← phi( main/(byte) $80 main::@4/(byte) main::a#1 main::@5/(byte) main::a#2 )
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[6] if((byte) main::a#2!=(byte) main::b#2) goto main::@2
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to:main::@3
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main::@3: scope:[main] from main::@1
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[7] *((const byte*) SCREEN) ← (byte) main::a#2
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to:main::@return
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main::@return: scope:[main] from main::@3
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[8] return
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to:@return
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main::@2: scope:[main] from main::@1
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[9] if((byte) main::a#2>(byte) main::b#2) goto main::@4
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to:main::@5
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main::@5: scope:[main] from main::@2
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[10] (byte) main::b#1 ← (byte) main::b#2 - (byte) main::a#2
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to:main::@1
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main::@4: scope:[main] from main::@2
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[11] (byte) main::a#1 ← (byte) main::a#2 - (byte) main::b#2
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to:main::@1
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VARIABLE REGISTER WEIGHTS
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(void()) main()
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(byte) main::a
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(byte) main::a#1 202.0
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(byte) main::a#2 179.5
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(byte) main::b
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(byte) main::b#1 202.0
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(byte) main::b#2 176.75
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Initial phi equivalence classes
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[ main::a#2 main::a#1 ]
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[ main::b#2 main::b#1 ]
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Complete equivalence classes
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[ main::a#2 main::a#1 ]
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[ main::b#2 main::b#1 ]
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Allocated zp[1]:2 [ main::a#2 main::a#1 ]
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Allocated zp[1]:3 [ main::b#2 main::b#1 ]
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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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// Demonstrates a problem where wrong alive ranges result in clobbering an alive variable
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// The compiler does not realize that A is alive in the statement b=b-a - and thus can clobber it.
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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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.label SCREEN = $400
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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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// [4] phi from @1 to main [phi:@1->main]
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main_from___b1:
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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 a = 2
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.label b = 3
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// [5] phi from main to main::@1 [phi:main->main::@1]
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__b1_from_main:
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// [5] phi (byte) main::b#2 = (byte) 2 [phi:main->main::@1#0] -- vbuz1=vbuc1
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lda #2
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sta.z b
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// [5] phi (byte) main::a#2 = (byte) $80 [phi:main->main::@1#1] -- vbuz1=vbuc1
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lda #$80
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sta.z a
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jmp __b1
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// main::@1
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__b1:
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// [6] if((byte) main::a#2!=(byte) main::b#2) goto main::@2 -- vbuz1_neq_vbuz2_then_la1
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lda.z a
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cmp.z b
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bne __b2
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jmp __b3
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// main::@3
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__b3:
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// [7] *((const byte*) SCREEN) ← (byte) main::a#2 -- _deref_pbuc1=vbuz1
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lda.z a
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sta SCREEN
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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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// main::@2
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__b2:
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// [9] if((byte) main::a#2>(byte) main::b#2) goto main::@4 -- vbuz1_gt_vbuz2_then_la1
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lda.z b
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cmp.z a
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bcc __b4
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jmp __b5
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// main::@5
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__b5:
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// [10] (byte) main::b#1 ← (byte) main::b#2 - (byte) main::a#2 -- vbuz1=vbuz1_minus_vbuz2
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lda.z b
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sec
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sbc.z a
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sta.z b
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// [5] phi from main::@4 main::@5 to main::@1 [phi:main::@4/main::@5->main::@1]
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__b1_from___b4:
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__b1_from___b5:
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// [5] phi (byte) main::b#2 = (byte) main::b#2 [phi:main::@4/main::@5->main::@1#0] -- register_copy
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// [5] phi (byte) main::a#2 = (byte) main::a#1 [phi:main::@4/main::@5->main::@1#1] -- register_copy
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jmp __b1
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// main::@4
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__b4:
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// [11] (byte) main::a#1 ← (byte) main::a#2 - (byte) main::b#2 -- vbuz1=vbuz1_minus_vbuz2
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lda.z a
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sec
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sbc.z b
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sta.z a
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jmp __b1_from___b4
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}
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// File Data
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REGISTER UPLIFT POTENTIAL REGISTERS
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Statement [10] (byte) main::b#1 ← (byte) main::b#2 - (byte) main::a#2 [ main::a#2 main::b#1 ] ( main:2 [ main::a#2 main::b#1 ] { } ) always clobbers reg byte a
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Removing always clobbered register reg byte a as potential for zp[1]:2 [ main::a#2 main::a#1 ]
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Statement [11] (byte) main::a#1 ← (byte) main::a#2 - (byte) main::b#2 [ main::b#2 main::a#1 ] ( main:2 [ main::b#2 main::a#1 ] { } ) always clobbers reg byte a
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Removing always clobbered register reg byte a as potential for zp[1]:3 [ main::b#2 main::b#1 ]
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Statement [10] (byte) main::b#1 ← (byte) main::b#2 - (byte) main::a#2 [ main::a#2 main::b#1 ] ( main:2 [ main::a#2 main::b#1 ] { } ) always clobbers reg byte a
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Statement [11] (byte) main::a#1 ← (byte) main::a#2 - (byte) main::b#2 [ main::b#2 main::a#1 ] ( main:2 [ main::b#2 main::a#1 ] { } ) always clobbers reg byte a
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Potential registers zp[1]:2 [ main::a#2 main::a#1 ] : zp[1]:2 , reg byte x , reg byte y ,
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Potential registers zp[1]:3 [ main::b#2 main::b#1 ] : zp[1]:3 , reg byte x , reg byte y ,
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REGISTER UPLIFT SCOPES
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Uplift Scope [main] 381.5: zp[1]:2 [ main::a#2 main::a#1 ] 378.75: zp[1]:3 [ main::b#2 main::b#1 ]
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Uplift Scope []
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Uplifting [main] best 568 combination zp[1]:2 [ main::a#2 main::a#1 ] reg byte x [ main::b#2 main::b#1 ]
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Uplifting [] best 568 combination
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Attempting to uplift remaining variables inzp[1]:2 [ main::a#2 main::a#1 ]
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Uplifting [main] best 568 combination zp[1]:2 [ main::a#2 main::a#1 ]
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ASSEMBLER BEFORE OPTIMIZATION
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// File Comments
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// Demonstrates a problem where wrong alive ranges result in clobbering an alive variable
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// The compiler does not realize that A is alive in the statement b=b-a - and thus can clobber it.
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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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.label SCREEN = $400
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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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// [4] phi from @1 to main [phi:@1->main]
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main_from___b1:
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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 a = 2
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// [5] phi from main to main::@1 [phi:main->main::@1]
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__b1_from_main:
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// [5] phi (byte) main::b#2 = (byte) 2 [phi:main->main::@1#0] -- vbuxx=vbuc1
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ldx #2
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// [5] phi (byte) main::a#2 = (byte) $80 [phi:main->main::@1#1] -- vbuz1=vbuc1
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lda #$80
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sta.z a
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jmp __b1
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// main::@1
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__b1:
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// [6] if((byte) main::a#2!=(byte) main::b#2) goto main::@2 -- vbuz1_neq_vbuxx_then_la1
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cpx.z a
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bne __b2
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jmp __b3
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// main::@3
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__b3:
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// [7] *((const byte*) SCREEN) ← (byte) main::a#2 -- _deref_pbuc1=vbuz1
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lda.z a
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sta SCREEN
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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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// main::@2
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__b2:
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// [9] if((byte) main::a#2>(byte) main::b#2) goto main::@4 -- vbuz1_gt_vbuxx_then_la1
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cpx.z a
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bcc __b4
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jmp __b5
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// main::@5
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__b5:
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// [10] (byte) main::b#1 ← (byte) main::b#2 - (byte) main::a#2 -- vbuxx=vbuxx_minus_vbuz1
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txa
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sec
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sbc.z a
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tax
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// [5] phi from main::@4 main::@5 to main::@1 [phi:main::@4/main::@5->main::@1]
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__b1_from___b4:
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__b1_from___b5:
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// [5] phi (byte) main::b#2 = (byte) main::b#2 [phi:main::@4/main::@5->main::@1#0] -- register_copy
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// [5] phi (byte) main::a#2 = (byte) main::a#1 [phi:main::@4/main::@5->main::@1#1] -- register_copy
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jmp __b1
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// main::@4
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__b4:
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// [11] (byte) main::a#1 ← (byte) main::a#2 - (byte) main::b#2 -- vbuz1=vbuz1_minus_vbuxx
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txa
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eor #$ff
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sec
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adc.z a
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sta.z a
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jmp __b1_from___b4
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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 __b3
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Removing instruction jmp __breturn
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Removing instruction jmp __b5
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Succesful ASM optimization Pass5NextJumpElimination
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Replacing label __b1_from___b4 with __b1_from___b5
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Removing instruction __b1_from___bbegin:
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Removing instruction __b1:
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Removing instruction main_from___b1:
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Removing instruction __bend_from___b1:
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Removing instruction __b1_from___b4:
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Succesful ASM optimization Pass5RedundantLabelElimination
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Removing instruction __bbegin:
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Removing instruction __bend:
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Removing instruction __b1_from_main:
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Removing instruction __b3:
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Removing instruction __breturn:
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Removing instruction __b5:
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Succesful ASM optimization Pass5UnusedLabelElimination
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Removing instruction jsr main
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Succesful ASM optimization Pass5SkipBegin
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Skipping double jump to __b1 in jmp __b1_from___b5
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Succesful ASM optimization Pass5DoubleJumpElimination
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Relabelling long label __b1_from___b5 to __b3
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Succesful ASM optimization Pass5RelabelLongLabels
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Removing instruction __b3:
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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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(const byte*) SCREEN = (byte*) 1024
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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::@3
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(label) main::@4
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(label) main::@5
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(label) main::@return
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(byte) main::a
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(byte) main::a#1 a zp[1]:2 202.0
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(byte) main::a#2 a zp[1]:2 179.5
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(byte) main::b
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(byte) main::b#1 reg byte x 202.0
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(byte) main::b#2 reg byte x 176.75
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zp[1]:2 [ main::a#2 main::a#1 ]
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reg byte x [ main::b#2 main::b#1 ]
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FINAL ASSEMBLER
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Score: 463
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// File Comments
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// Demonstrates a problem where wrong alive ranges result in clobbering an alive variable
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// The compiler does not realize that A is alive in the statement b=b-a - and thus can clobber it.
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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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.label SCREEN = $400
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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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// [4] phi from @1 to main [phi:@1->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 a = 2
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// [5] phi from main to main::@1 [phi:main->main::@1]
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// [5] phi (byte) main::b#2 = (byte) 2 [phi:main->main::@1#0] -- vbuxx=vbuc1
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ldx #2
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// [5] phi (byte) main::a#2 = (byte) $80 [phi:main->main::@1#1] -- vbuz1=vbuc1
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lda #$80
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sta.z a
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// main::@1
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__b1:
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// while (a!=b)
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// [6] if((byte) main::a#2!=(byte) main::b#2) goto main::@2 -- vbuz1_neq_vbuxx_then_la1
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cpx.z a
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bne __b2
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// main::@3
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// *SCREEN = a
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// [7] *((const byte*) SCREEN) ← (byte) main::a#2 -- _deref_pbuc1=vbuz1
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lda.z a
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sta SCREEN
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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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// main::@2
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__b2:
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// if(a>b)
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// [9] if((byte) main::a#2>(byte) main::b#2) goto main::@4 -- vbuz1_gt_vbuxx_then_la1
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cpx.z a
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bcc __b4
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// main::@5
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// b = b-a
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// [10] (byte) main::b#1 ← (byte) main::b#2 - (byte) main::a#2 -- vbuxx=vbuxx_minus_vbuz1
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txa
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|
sec
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sbc.z a
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tax
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// [5] phi from main::@4 main::@5 to main::@1 [phi:main::@4/main::@5->main::@1]
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// [5] phi (byte) main::b#2 = (byte) main::b#2 [phi:main::@4/main::@5->main::@1#0] -- register_copy
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// [5] phi (byte) main::a#2 = (byte) main::a#1 [phi:main::@4/main::@5->main::@1#1] -- register_copy
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jmp __b1
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// main::@4
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__b4:
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// a = a-b
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// [11] (byte) main::a#1 ← (byte) main::a#2 - (byte) main::b#2 -- vbuz1=vbuz1_minus_vbuxx
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|
txa
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|
eor #$ff
|
|
sec
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adc.z a
|
|
sta.z a
|
|
jmp __b1
|
|
}
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// File Data
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