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kickc/src/test/ref/roll-variable.log

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Identified constant variable (byte*) main::screen
Culled Empty Block (label) main::@2
CONTROL FLOW GRAPH SSA
@begin: scope:[] from
to:@1
main: scope:[main] from @1
(byte*) main::screen#0 ← ((byte*)) (number) $400
(byte) main::b#0 ← (byte) 0
to:main::@1
main::@1: scope:[main] from main main::@1
(byte) main::b#2 ← phi( main/(byte) main::b#0 main::@1/(byte) main::b#1 )
(number~) main::$0 ← (number) $55 << (byte) main::b#2
*((byte*) main::screen#0 + (byte) main::b#2) ← (number~) main::$0
(byte) main::b#1 ← (byte) main::b#2 + rangenext(0,7)
(bool~) main::$1 ← (byte) main::b#1 != rangelast(0,7)
if((bool~) main::$1) goto main::@1
to:main::@return
main::@return: scope:[main] from main::@1
return
to:@return
@1: scope:[] from @begin
call main
to:@2
@2: scope:[] from @1
to:@end
@end: scope:[] from @2
SYMBOL TABLE SSA
(label) @1
(label) @2
(label) @begin
(label) @end
(void()) main()
(number~) main::$0
(bool~) main::$1
(label) main::@1
(label) main::@return
(byte) main::b
(byte) main::b#0
(byte) main::b#1
(byte) main::b#2
(byte*) main::screen
(byte*) main::screen#0
Adding number conversion cast (unumber) $55 in (number~) main::$0 ← (number) $55 << (byte) main::b#2
Adding number conversion cast (unumber) main::$0 in (number~) main::$0 ← (unumber)(number) $55 << (byte) main::b#2
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast (byte*) main::screen#0 ← (byte*)(number) $400
Successful SSA optimization Pass2InlineCast
Simplifying constant pointer cast (byte*) 1024
Simplifying constant integer cast $55
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) $55
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inferred type updated to byte in (unumber~) main::$0 ← (byte) $55 << (byte) main::b#2
Simple Condition (bool~) main::$1 [7] if((byte) main::b#1!=rangelast(0,7)) goto main::@1
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant (const byte*) main::screen#0 = (byte*) 1024
Constant (const byte) main::b#0 = 0
Successful SSA optimization Pass2ConstantIdentification
Resolved ranged next value [5] main::b#1 ← ++ main::b#2 to ++
Resolved ranged comparison value [7] if(main::b#1!=rangelast(0,7)) goto main::@1 to (number) 8
Adding number conversion cast (unumber) 8 in if((byte) main::b#1!=(number) 8) goto main::@1
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast 8
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 8
Successful SSA optimization PassNFinalizeNumberTypeConversions
Inlining constant with var siblings (const byte) main::b#0
Constant inlined main::b#0 = (byte) 0
Successful SSA optimization Pass2ConstantInlining
Added new block during phi lifting main::@3(between main::@1 and main::@1)
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @1
Adding NOP phi() at start of @2
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
CALL GRAPH
Calls in [] to main:2
Created 1 initial phi equivalence classes
Coalesced [12] main::b#3 ← main::b#1
Coalesced down to 1 phi equivalence classes
Culled Empty Block (label) @2
Culled Empty Block (label) main::@3
Adding NOP phi() at start of @begin
Adding NOP phi() at start of @1
Adding NOP phi() at start of @end
Adding NOP phi() at start of main
FINAL CONTROL FLOW GRAPH
@begin: scope:[] from
[0] phi()
to:@1
@1: scope:[] from @begin
[1] phi()
[2] call main
to:@end
@end: scope:[] from @1
[3] phi()
main: scope:[main] from @1
[4] phi()
to:main::@1
main::@1: scope:[main] from main main::@1
[5] (byte) main::b#2 ← phi( main/(byte) 0 main::@1/(byte) main::b#1 )
[6] (byte~) main::$0 ← (byte) $55 << (byte) main::b#2
[7] *((const byte*) main::screen#0 + (byte) main::b#2) ← (byte~) main::$0
[8] (byte) main::b#1 ← ++ (byte) main::b#2
[9] if((byte) main::b#1!=(byte) 8) goto main::@1
to:main::@return
main::@return: scope:[main] from main::@1
[10] return
to:@return
VARIABLE REGISTER WEIGHTS
(void()) main()
(byte~) main::$0 22.0
(byte) main::b
(byte) main::b#1 16.5
(byte) main::b#2 14.666666666666666
(byte*) main::screen
Initial phi equivalence classes
[ main::b#2 main::b#1 ]
Added variable main::$0 to zero page equivalence class [ main::$0 ]
Complete equivalence classes
[ main::b#2 main::b#1 ]
[ main::$0 ]
Allocated zp ZP_BYTE:2 [ main::b#2 main::b#1 ]
Allocated zp ZP_BYTE:3 [ main::$0 ]
INITIAL ASM
Target platform is c64basic / MOS6502X
// File Comments
// Rolling constants by a variable amount
// Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
// Global Constants & labels
// @begin
bbegin:
// [1] phi from @begin to @1 [phi:@begin->@1]
b1_from_bbegin:
jmp b1
// @1
b1:
// [2] call main
// [4] phi from @1 to main [phi:@1->main]
main_from_b1:
jsr main
// [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
jmp bend
// @end
bend:
// main
main: {
.label screen = $400
.label _0 = 3
.label b = 2
// [5] phi from main to main::@1 [phi:main->main::@1]
b1_from_main:
// [5] phi (byte) main::b#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1
lda #0
sta.z b
jmp b1
// [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
b1_from_b1:
// [5] phi (byte) main::b#2 = (byte) main::b#1 [phi:main::@1->main::@1#0] -- register_copy
jmp b1
// main::@1
b1:
// [6] (byte~) main::$0 ← (byte) $55 << (byte) main::b#2 -- vbuz1=vbuc1_rol_vbuz2
lda #$55
ldy.z b
cpy #0
beq !e+
!:
asl
dey
bne !-
!e:
sta.z _0
// [7] *((const byte*) main::screen#0 + (byte) main::b#2) ← (byte~) main::$0 -- pbuc1_derefidx_vbuz1=vbuz2
lda.z _0
ldy.z b
sta screen,y
// [8] (byte) main::b#1 ← ++ (byte) main::b#2 -- vbuz1=_inc_vbuz1
inc.z b
// [9] if((byte) main::b#1!=(byte) 8) goto main::@1 -- vbuz1_neq_vbuc1_then_la1
lda #8
cmp.z b
bne b1_from_b1
jmp breturn
// main::@return
breturn:
// [10] return
rts
}
// File Data
REGISTER UPLIFT POTENTIAL REGISTERS
Statement [6] (byte~) main::$0 ← (byte) $55 << (byte) main::b#2 [ main::b#2 main::$0 ] ( main:2 [ main::b#2 main::$0 ] ) always clobbers reg byte a
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ main::b#2 main::b#1 ]
Statement [6] (byte~) main::$0 ← (byte) $55 << (byte) main::b#2 [ main::b#2 main::$0 ] ( main:2 [ main::b#2 main::$0 ] ) always clobbers reg byte a
Potential registers zp ZP_BYTE:2 [ main::b#2 main::b#1 ] : zp ZP_BYTE:2 , reg byte x , reg byte y ,
Potential registers zp ZP_BYTE:3 [ main::$0 ] : zp ZP_BYTE:3 , reg byte a , reg byte x , reg byte y ,
REGISTER UPLIFT SCOPES
Uplift Scope [main] 31.17: zp ZP_BYTE:2 [ main::b#2 main::b#1 ] 22: zp ZP_BYTE:3 [ main::$0 ]
Uplift Scope []
Uplifting [main] best 523 combination zp ZP_BYTE:2 [ main::b#2 main::b#1 ] reg byte a [ main::$0 ]
Uplifting [] best 523 combination
Attempting to uplift remaining variables inzp ZP_BYTE:2 [ main::b#2 main::b#1 ]
Uplifting [main] best 523 combination zp ZP_BYTE:2 [ main::b#2 main::b#1 ]
ASSEMBLER BEFORE OPTIMIZATION
// File Comments
// Rolling constants by a variable amount
// Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
// Global Constants & labels
// @begin
bbegin:
// [1] phi from @begin to @1 [phi:@begin->@1]
b1_from_bbegin:
jmp b1
// @1
b1:
// [2] call main
// [4] phi from @1 to main [phi:@1->main]
main_from_b1:
jsr main
// [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
jmp bend
// @end
bend:
// main
main: {
.label screen = $400
.label b = 2
// [5] phi from main to main::@1 [phi:main->main::@1]
b1_from_main:
// [5] phi (byte) main::b#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1
lda #0
sta.z b
jmp b1
// [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
b1_from_b1:
// [5] phi (byte) main::b#2 = (byte) main::b#1 [phi:main::@1->main::@1#0] -- register_copy
jmp b1
// main::@1
b1:
// [6] (byte~) main::$0 ← (byte) $55 << (byte) main::b#2 -- vbuaa=vbuc1_rol_vbuz1
lda #$55
ldy.z b
cpy #0
beq !e+
!:
asl
dey
bne !-
!e:
// [7] *((const byte*) main::screen#0 + (byte) main::b#2) ← (byte~) main::$0 -- pbuc1_derefidx_vbuz1=vbuaa
ldy.z b
sta screen,y
// [8] (byte) main::b#1 ← ++ (byte) main::b#2 -- vbuz1=_inc_vbuz1
inc.z b
// [9] if((byte) main::b#1!=(byte) 8) goto main::@1 -- vbuz1_neq_vbuc1_then_la1
lda #8
cmp.z b
bne b1_from_b1
jmp breturn
// main::@return
breturn:
// [10] return
rts
}
// File Data
ASSEMBLER OPTIMIZATIONS
Removing instruction jmp b1
Removing instruction jmp bend
Removing instruction jmp b1
Removing instruction jmp breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing label b1_from_b1 with b1
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction main_from_b1:
Removing instruction bend_from_b1:
Removing instruction b1_from_b1:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction b1_from_main:
Removing instruction breturn:
Succesful ASM optimization Pass5UnusedLabelElimination
Updating BasicUpstart to call main directly
Removing instruction jsr main
Succesful ASM optimization Pass5SkipBegin
Removing instruction jmp b1
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction bbegin:
Succesful ASM optimization Pass5UnusedLabelElimination
FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(void()) main()
(byte~) main::$0 reg byte a 22.0
(label) main::@1
(label) main::@return
(byte) main::b
(byte) main::b#1 b zp ZP_BYTE:2 16.5
(byte) main::b#2 b zp ZP_BYTE:2 14.666666666666666
(byte*) main::screen
(const byte*) main::screen#0 screen = (byte*) 1024
zp ZP_BYTE:2 [ main::b#2 main::b#1 ]
reg byte a [ main::$0 ]
FINAL ASSEMBLER
Score: 421
// File Comments
// Rolling constants by a variable amount
// Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
// Global Constants & labels
// @begin
// [1] phi from @begin to @1 [phi:@begin->@1]
// @1
// [2] call main
// [4] phi from @1 to main [phi:@1->main]
// [3] phi from @1 to @end [phi:@1->@end]
// @end
// main
main: {
.label screen = $400
.label b = 2
// [5] phi from main to main::@1 [phi:main->main::@1]
// [5] phi (byte) main::b#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1
lda #0
sta.z b
// [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
// [5] phi (byte) main::b#2 = (byte) main::b#1 [phi:main::@1->main::@1#0] -- register_copy
// main::@1
b1:
// $55 << b
// [6] (byte~) main::$0 ← (byte) $55 << (byte) main::b#2 -- vbuaa=vbuc1_rol_vbuz1
lda #$55
ldy.z b
cpy #0
beq !e+
!:
asl
dey
bne !-
!e:
// screen[b] = $55 << b
// [7] *((const byte*) main::screen#0 + (byte) main::b#2) ← (byte~) main::$0 -- pbuc1_derefidx_vbuz1=vbuaa
ldy.z b
sta screen,y
// for( byte b: 0..7)
// [8] (byte) main::b#1 ← ++ (byte) main::b#2 -- vbuz1=_inc_vbuz1
inc.z b
// [9] if((byte) main::b#1!=(byte) 8) goto main::@1 -- vbuz1_neq_vbuc1_then_la1
lda #8
cmp.z b
bne b1
// main::@return
// }
// [10] return
rts
}
// File Data
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