mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-09-30 09:57:11 +00:00
268 lines
6.2 KiB
Plaintext
268 lines
6.2 KiB
Plaintext
Resolved forward reference screen to (byte*) screen
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Resolved forward reference b to (byte) b
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Resolved forward reference b to (byte) b
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Resolved forward reference screen to (byte*) screen
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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*) screen#0 ← ((byte*)) (number) $400
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(byte) b#0 ← (byte) 'a'
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*((byte*) screen#0) ← (byte) b#0
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to:main::@return
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main::@return: scope:[main] from main
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(byte) b#4 ← phi( main/(byte) b#0 )
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(byte*) screen#4 ← phi( main/(byte*) screen#0 )
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(byte*) screen#1 ← (byte*) screen#4
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(byte) b#1 ← (byte) b#4
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return
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to:@return
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@1: scope:[] from @begin
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(byte*) screen#2 ← (byte*) 0
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(byte) b#2 ← (byte) 0
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call main
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to:@2
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@2: scope:[] from @1
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(byte) b#5 ← phi( @1/(byte) b#1 )
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(byte*) screen#5 ← phi( @1/(byte*) screen#1 )
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(byte*) screen#3 ← (byte*) screen#5
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(byte) b#3 ← (byte) b#5
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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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(byte) b
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(byte) b#0
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(byte) b#1
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(byte) b#2
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(byte) b#3
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(byte) b#4
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(byte) b#5
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(void()) main()
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(label) main::@return
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(byte*) screen
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(byte*) screen#0
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(byte*) screen#1
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(byte*) screen#2
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(byte*) screen#3
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(byte*) screen#4
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(byte*) screen#5
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Inlining cast (byte*) screen#0 ← (byte*)(number) $400
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Successful SSA optimization Pass2InlineCast
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Simplifying constant pointer cast (byte*) 1024
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Successful SSA optimization PassNCastSimplification
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Alias (byte*) screen#0 = (byte*) screen#4 (byte*) screen#1
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Alias (byte) b#0 = (byte) b#4 (byte) b#1
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Alias (byte*) screen#3 = (byte*) screen#5
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Alias (byte) b#3 = (byte) b#5
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Successful SSA optimization Pass2AliasElimination
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Identical Phi Values (byte*) screen#3 (byte*) screen#0
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Identical Phi Values (byte) b#3 (byte) b#0
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Successful SSA optimization Pass2IdenticalPhiElimination
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Constant (const byte*) screen#0 = (byte*) 1024
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Constant (const byte) b#0 = 'a'
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Constant (const byte*) screen#2 = (byte*) 0
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Constant (const byte) b#2 = 0
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Successful SSA optimization Pass2ConstantIdentification
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Eliminating unused constant (const byte*) screen#2
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Eliminating unused constant (const byte) b#2
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Successful SSA optimization PassNEliminateUnusedVars
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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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CALL GRAPH
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Calls in [] to main:2
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Created 0 initial phi equivalence classes
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Coalesced down to 0 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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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] *((const byte*) screen#0) ← (const byte) b#0
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to:main::@return
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main::@return: scope:[main] from main
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[5] return
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to:@return
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VARIABLE REGISTER WEIGHTS
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(byte) b
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(void()) main()
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(byte*) screen
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Initial phi equivalence classes
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Complete equivalence classes
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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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// Illustrates the problem with variable forward references not working
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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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.label screen = $400
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.const b = 'a'
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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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// [4] *((const byte*) screen#0) ← (const byte) b#0 -- _deref_pbuc1=vbuc2
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lda #b
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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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// [5] 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] *((const byte*) screen#0) ← (const byte) b#0 [ ] ( main:2 [ ] ) always clobbers reg byte a
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REGISTER UPLIFT SCOPES
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Uplift Scope [main]
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Uplift Scope []
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Uplifting [main] best 27 combination
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Uplifting [] best 27 combination
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ASSEMBLER BEFORE OPTIMIZATION
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// File Comments
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// Illustrates the problem with variable forward references not working
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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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.label screen = $400
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.const b = 'a'
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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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// [4] *((const byte*) screen#0) ← (const byte) b#0 -- _deref_pbuc1=vbuc2
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lda #b
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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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// [5] 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 __breturn
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Succesful ASM optimization Pass5NextJumpElimination
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Replacing label __bbegin with __b1
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Removing instruction __bbegin:
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Removing instruction __b1_from___bbegin:
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Removing instruction __bend_from___b1:
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Succesful ASM optimization Pass5RedundantLabelElimination
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Removing instruction __bend:
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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 __b1:
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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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(byte) b
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(const byte) b#0 b = (byte) 'a'
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(void()) main()
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(label) main::@return
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(byte*) screen
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(const byte*) screen#0 screen = (byte*) 1024
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FINAL ASSEMBLER
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Score: 12
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// File Comments
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// Illustrates the problem with variable forward references not working
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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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.const b = 'a'
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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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// *screen = b
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// [4] *((const byte*) screen#0) ← (const byte) b#0 -- _deref_pbuc1=vbuc2
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lda #b
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sta screen
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// main::@return
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// }
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// [5] return
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rts
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}
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// File Data
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