kickc/src/test/ref/multiply-1.log

CONTROL FLOW GRAPH SSA

void main()
main: scope:[main]  from __start
  main::$0 = main::c1 * 2
  main::c2#0 = main::$0
  main::c2#1 = ++ main::c2#0
  main::$1 = main::c1 * main::c2#1
  main::c3#0 = main::$1
  SCREEN[0] = main::c3#0
  to:main::@return
main::@return: scope:[main]  from main
  return 
  to:@return

void __start()
__start: scope:[__start]  from
  call main 
  to:__start::@1
__start::@1: scope:[__start]  from __start
  to:__start::@return
__start::@return: scope:[__start]  from __start::@1
  return 
  to:@return

SYMBOL TABLE SSA
const nomodify byte* SCREEN = (byte*)$400
void __start()
void main()
number~ main::$0
byte~ main::$1
const byte main::c1 = 4
byte main::c2
byte main::c2#0
byte main::c2#1
byte main::c3
byte main::c3#0

Adding number conversion cast (unumber) 2 in main::$0 = main::c1 * 2
Adding number conversion cast (unumber) main::$0 in main::$0 = main::c1 * (unumber)2
Adding number conversion cast (unumber) 0 in SCREEN[0] = main::c3#0
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast 2
Simplifying constant integer cast 0
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 2
Finalized unsigned number type (byte) 0
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inferred type updated to byte in main::$0 = main::c1 * 2
Alias main::c2#0 = main::$0 
Alias main::c3#0 = main::$1 
Successful SSA optimization Pass2AliasElimination
Constant right-side identified [0] main::c2#0 = main::c1 * 2
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant main::c2#0 = main::c1*2
Successful SSA optimization Pass2ConstantIdentification
Simplifying expression containing zero SCREEN in [3] SCREEN[0] = main::c3#0
Successful SSA optimization PassNSimplifyExpressionWithZero
Removing unused procedure __start
Removing unused procedure block __start
Removing unused procedure block __start::@1
Removing unused procedure block __start::@return
Successful SSA optimization PassNEliminateEmptyStart
Constant right-side identified [0] main::c2#1 = ++ main::c2#0
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant main::c2#1 = ++main::c2#0
Successful SSA optimization Pass2ConstantIdentification
Constant right-side identified [0] main::c3#0 = main::c1 * main::c2#1
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant main::c3#0 = main::c1*main::c2#1
Successful SSA optimization Pass2ConstantIdentification
Inlining constant with different constant siblings main::c2#0
Inlining constant with different constant siblings main::c2#1
Constant inlined main::c2#0 = main::c1*2
Constant inlined main::c2#1 = ++main::c1*2
Successful SSA optimization Pass2ConstantInlining
Simplifying constant integer increment ++main::c1*2
Successful SSA optimization Pass2ConstantSimplification
Adding number conversion cast (unumber) main::c1*2+1 in 
Adding number conversion cast (unumber) 1 in 
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast main::c1*2+(unumber)1
Simplifying constant integer cast 1
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 1
Successful SSA optimization PassNFinalizeNumberTypeConversions
CALL GRAPH

Created 0 initial phi equivalence classes
Coalesced down to 0 phi equivalence classes

FINAL CONTROL FLOW GRAPH

void main()
main: scope:[main]  from
  [0] *SCREEN = main::c3#0
  to:main::@return
main::@return: scope:[main]  from main
  [1] return 
  to:@return


VARIABLE REGISTER WEIGHTS
void main()
byte main::c2
byte main::c3

Initial phi equivalence classes
Complete equivalence classes
REGISTER UPLIFT POTENTIAL REGISTERS
Statement [0] *SCREEN = main::c3#0 [ ] (  [ ] { }  ) always clobbers reg byte a 

REGISTER UPLIFT SCOPES
Uplift Scope [main] 
Uplift Scope [] 

Uplifting [main] best 15 combination 
Uplifting [] best 15 combination 

ASSEMBLER BEFORE OPTIMIZATION
  // File Comments
// Test compile-time and run-time multiplication
// Compile-time multiplication
  // Upstart
  // Commodore 64 PRG executable file
.file [name="multiply-1.prg", type="prg", segments="Program"]
.segmentdef Program [segments="Basic, Code, Data"]
.segmentdef Basic [start=$0801]
.segmentdef Code [start=$80d]
.segmentdef Data [startAfter="Code"]
.segment Basic
:BasicUpstart(main)
  // Global Constants & labels
  .label SCREEN = $400
.segment Code
  // main
main: {
    .const c1 = 4
    .const c3 = c1*(c1*2+1)
    // [0] *SCREEN = main::c3#0 -- _deref_pbuc1=vbuc2 
    lda #c3
    sta SCREEN
    jmp __breturn
    // main::@return
  __breturn:
    // [1] return 
    rts
}
  // File Data

ASSEMBLER OPTIMIZATIONS
Removing instruction jmp __breturn
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction __breturn:
Succesful ASM optimization Pass5UnusedLabelElimination

FINAL SYMBOL TABLE
const nomodify byte* SCREEN = (byte*) 1024
void main()
const byte main::c1 = 4
byte main::c2
byte main::c3
const byte main::c3#0 c3 = main::c1*main::c1*2+1



FINAL ASSEMBLER
Score: 12

  // File Comments
// Test compile-time and run-time multiplication
// Compile-time multiplication
  // Upstart
  // Commodore 64 PRG executable file
.file [name="multiply-1.prg", type="prg", segments="Program"]
.segmentdef Program [segments="Basic, Code, Data"]
.segmentdef Basic [start=$0801]
.segmentdef Code [start=$80d]
.segmentdef Data [startAfter="Code"]
.segment Basic
:BasicUpstart(main)
  // Global Constants & labels
  .label SCREEN = $400
.segment Code
  // main
main: {
    .const c1 = 4
    .const c3 = c1*(c1*2+1)
    // SCREEN[0] = c3
    // [0] *SCREEN = main::c3#0 -- _deref_pbuc1=vbuc2 
    lda #c3
    sta SCREEN
    // main::@return
    // }
    // [1] return 
    rts
}
  // File Data