mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-10-02 22:56:11 +00:00
546 lines
19 KiB
Plaintext
546 lines
19 KiB
Plaintext
Culled Empty Block (label) @1
|
|
Culled Empty Block (label) popup_selector::@4
|
|
Culled Empty Block (label) popup_selector::@3
|
|
Culled Empty Block (label) popup_selector::@5
|
|
Culled Empty Block (label) popup_selector::@6
|
|
|
|
CONTROL FLOW GRAPH SSA
|
|
@begin: scope:[] from
|
|
(byte*) screen ← ((byte*)) (number) $400
|
|
(byte) opcode#0 ← (byte) 'a'
|
|
to:@2
|
|
|
|
(void()) main()
|
|
main: scope:[main] from @2
|
|
(byte) opcode#6 ← phi( @2/(byte) opcode#11 )
|
|
*((byte*) screen + (number) $28) ← (byte) opcode#6
|
|
call popup_selector
|
|
to:main::@1
|
|
main::@1: scope:[main] from main
|
|
(byte) opcode#7 ← phi( main/(byte) opcode#4 )
|
|
(byte) opcode#1 ← (byte) opcode#7
|
|
*((byte*) screen + (number) $29) ← (byte) opcode#1
|
|
to:main::@return
|
|
main::@return: scope:[main] from main::@1
|
|
(byte) opcode#8 ← phi( main::@1/(byte) opcode#1 )
|
|
(byte) opcode#2 ← (byte) opcode#8
|
|
return
|
|
to:@return
|
|
|
|
(void()) popup_selector()
|
|
popup_selector: scope:[popup_selector] from main
|
|
(byte) opcode#13 ← phi( main/(byte) opcode#6 )
|
|
(byte) popup_selector::k#0 ← (number) 0
|
|
to:popup_selector::@1
|
|
popup_selector::@1: scope:[popup_selector] from popup_selector popup_selector::@2
|
|
(byte) opcode#12 ← phi( popup_selector/(byte) opcode#13 popup_selector::@2/(byte) opcode#3 )
|
|
(byte) popup_selector::k#2 ← phi( popup_selector/(byte) popup_selector::k#0 popup_selector::@2/(byte) popup_selector::k#1 )
|
|
(bool~) popup_selector::$0 ← (byte) popup_selector::k#2 <= (number) 2
|
|
if((bool~) popup_selector::$0) goto popup_selector::@2
|
|
to:popup_selector::@return
|
|
popup_selector::@2: scope:[popup_selector] from popup_selector::@1
|
|
(byte) popup_selector::k#3 ← phi( popup_selector::@1/(byte) popup_selector::k#2 )
|
|
(byte) opcode#3 ← (byte) 'b'
|
|
*((byte*) screen + (byte) popup_selector::k#3) ← (byte) opcode#3
|
|
(byte) popup_selector::k#1 ← ++ (byte) popup_selector::k#3
|
|
to:popup_selector::@1
|
|
popup_selector::@return: scope:[popup_selector] from popup_selector::@1
|
|
(byte) opcode#9 ← phi( popup_selector::@1/(byte) opcode#12 )
|
|
(byte) opcode#4 ← (byte) opcode#9
|
|
return
|
|
to:@return
|
|
@2: scope:[] from @begin
|
|
(byte) opcode#11 ← phi( @begin/(byte) opcode#0 )
|
|
call main
|
|
to:@3
|
|
@3: scope:[] from @2
|
|
(byte) opcode#10 ← phi( @2/(byte) opcode#2 )
|
|
(byte) opcode#5 ← (byte) opcode#10
|
|
to:@end
|
|
@end: scope:[] from @3
|
|
|
|
SYMBOL TABLE SSA
|
|
(label) @2
|
|
(label) @3
|
|
(label) @begin
|
|
(label) @end
|
|
(void()) main()
|
|
(label) main::@1
|
|
(label) main::@return
|
|
(byte) opcode
|
|
(byte) opcode#0
|
|
(byte) opcode#1
|
|
(byte) opcode#10
|
|
(byte) opcode#11
|
|
(byte) opcode#12
|
|
(byte) opcode#13
|
|
(byte) opcode#2
|
|
(byte) opcode#3
|
|
(byte) opcode#4
|
|
(byte) opcode#5
|
|
(byte) opcode#6
|
|
(byte) opcode#7
|
|
(byte) opcode#8
|
|
(byte) opcode#9
|
|
(void()) popup_selector()
|
|
(bool~) popup_selector::$0
|
|
(label) popup_selector::@1
|
|
(label) popup_selector::@2
|
|
(label) popup_selector::@return
|
|
(byte) popup_selector::k
|
|
(byte) popup_selector::k#0
|
|
(byte) popup_selector::k#1
|
|
(byte) popup_selector::k#2
|
|
(byte) popup_selector::k#3
|
|
(byte*) screen
|
|
|
|
Adding number conversion cast (unumber) $28 in *((byte*) screen + (number) $28) ← (byte) opcode#6
|
|
Adding number conversion cast (unumber) $29 in *((byte*) screen + (number) $29) ← (byte) opcode#1
|
|
Adding number conversion cast (unumber) 0 in (byte) popup_selector::k#0 ← (number) 0
|
|
Adding number conversion cast (unumber) 2 in (bool~) popup_selector::$0 ← (byte) popup_selector::k#2 <= (number) 2
|
|
Successful SSA optimization PassNAddNumberTypeConversions
|
|
Inlining cast (byte*) screen ← (byte*)(number) $400
|
|
Inlining cast (byte) popup_selector::k#0 ← (unumber)(number) 0
|
|
Successful SSA optimization Pass2InlineCast
|
|
Simplifying constant pointer cast (byte*) 1024
|
|
Simplifying constant integer cast $28
|
|
Simplifying constant integer cast $29
|
|
Simplifying constant integer cast 0
|
|
Simplifying constant integer cast 2
|
|
Successful SSA optimization PassNCastSimplification
|
|
Finalized unsigned number type (byte) $28
|
|
Finalized unsigned number type (byte) $29
|
|
Finalized unsigned number type (byte) 0
|
|
Finalized unsigned number type (byte) 2
|
|
Successful SSA optimization PassNFinalizeNumberTypeConversions
|
|
Alias (byte) opcode#1 = (byte) opcode#7 (byte) opcode#8 (byte) opcode#2
|
|
Alias (byte) popup_selector::k#2 = (byte) popup_selector::k#3
|
|
Alias (byte) opcode#12 = (byte) opcode#9 (byte) opcode#4
|
|
Alias (byte) opcode#0 = (byte) opcode#11
|
|
Alias (byte) opcode#10 = (byte) opcode#5
|
|
Successful SSA optimization Pass2AliasElimination
|
|
Identical Phi Values (byte) opcode#6 (byte) opcode#0
|
|
Identical Phi Values (byte) opcode#1 (byte) opcode#12
|
|
Identical Phi Values (byte) opcode#13 (byte) opcode#6
|
|
Identical Phi Values (byte) opcode#10 (byte) opcode#1
|
|
Successful SSA optimization Pass2IdenticalPhiElimination
|
|
Simple Condition (bool~) popup_selector::$0 [15] if((byte) popup_selector::k#2<=(byte) 2) goto popup_selector::@2
|
|
Successful SSA optimization Pass2ConditionalJumpSimplification
|
|
Constant (const byte*) screen = (byte*) 1024
|
|
Constant (const byte) opcode#0 = 'a'
|
|
Constant (const byte) popup_selector::k#0 = 0
|
|
Constant (const byte) opcode#3 = 'b'
|
|
Successful SSA optimization Pass2ConstantIdentification
|
|
Rewriting conditional comparison [15] if((byte) popup_selector::k#2<=(byte) 2) goto popup_selector::@2
|
|
Adding number conversion cast (unumber) 2+1 in if((byte) popup_selector::k#2<(byte) 2+(number) 1) goto popup_selector::@2
|
|
Adding number conversion cast (unumber) 1 in if((byte) popup_selector::k#2<(unumber)(byte) 2+(number) 1) goto popup_selector::@2
|
|
Successful SSA optimization PassNAddNumberTypeConversions
|
|
Simplifying constant integer cast (byte) 2+(unumber)(number) 1
|
|
Simplifying constant integer cast 1
|
|
Successful SSA optimization PassNCastSimplification
|
|
Finalized unsigned number type (byte) 1
|
|
Successful SSA optimization PassNFinalizeNumberTypeConversions
|
|
Inlining constant with var siblings (const byte) popup_selector::k#0
|
|
Inlining constant with var siblings (const byte) opcode#0
|
|
Inlining constant with var siblings (const byte) opcode#3
|
|
Constant inlined opcode#3 = (byte) 'b'
|
|
Constant inlined opcode#0 = (byte) 'a'
|
|
Constant inlined popup_selector::k#0 = (byte) 0
|
|
Successful SSA optimization Pass2ConstantInlining
|
|
Consolidated array index constant in *(screen+$28)
|
|
Consolidated array index constant in *(screen+$29)
|
|
Successful SSA optimization Pass2ConstantAdditionElimination
|
|
Adding NOP phi() at start of @begin
|
|
Adding NOP phi() at start of @2
|
|
Adding NOP phi() at start of @3
|
|
Adding NOP phi() at start of @end
|
|
Adding NOP phi() at start of popup_selector
|
|
CALL GRAPH
|
|
Calls in [] to main:2
|
|
Calls in [main] to popup_selector:6
|
|
|
|
Created 2 initial phi equivalence classes
|
|
Coalesced [15] popup_selector::k#4 ← popup_selector::k#1
|
|
Coalesced down to 2 phi equivalence classes
|
|
Culled Empty Block (label) @3
|
|
Renumbering block @2 to @1
|
|
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 popup_selector
|
|
|
|
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()
|
|
|
|
(void()) main()
|
|
main: scope:[main] from @1
|
|
[4] *((const byte*) screen+(byte) $28) ← (byte) 'a'
|
|
[5] call popup_selector
|
|
to:main::@1
|
|
main::@1: scope:[main] from main
|
|
[6] *((const byte*) screen+(byte) $29) ← (byte) opcode#12
|
|
to:main::@return
|
|
main::@return: scope:[main] from main::@1
|
|
[7] return
|
|
to:@return
|
|
|
|
(void()) popup_selector()
|
|
popup_selector: scope:[popup_selector] from main
|
|
[8] phi()
|
|
to:popup_selector::@1
|
|
popup_selector::@1: scope:[popup_selector] from popup_selector popup_selector::@2
|
|
[9] (byte) opcode#12 ← phi( popup_selector/(byte) 'a' popup_selector::@2/(byte) 'b' )
|
|
[9] (byte) popup_selector::k#2 ← phi( popup_selector/(byte) 0 popup_selector::@2/(byte) popup_selector::k#1 )
|
|
[10] if((byte) popup_selector::k#2<(byte) 2+(byte) 1) goto popup_selector::@2
|
|
to:popup_selector::@return
|
|
popup_selector::@return: scope:[popup_selector] from popup_selector::@1
|
|
[11] return
|
|
to:@return
|
|
popup_selector::@2: scope:[popup_selector] from popup_selector::@1
|
|
[12] *((const byte*) screen + (byte) popup_selector::k#2) ← (byte) 'b'
|
|
[13] (byte) popup_selector::k#1 ← ++ (byte) popup_selector::k#2
|
|
to:popup_selector::@1
|
|
|
|
|
|
VARIABLE REGISTER WEIGHTS
|
|
(void()) main()
|
|
(byte) opcode
|
|
(byte) opcode#12 0.5
|
|
(void()) popup_selector()
|
|
(byte) popup_selector::k
|
|
(byte) popup_selector::k#1 22.0
|
|
(byte) popup_selector::k#2 14.666666666666666
|
|
|
|
Initial phi equivalence classes
|
|
[ popup_selector::k#2 popup_selector::k#1 ]
|
|
[ opcode#12 ]
|
|
Complete equivalence classes
|
|
[ popup_selector::k#2 popup_selector::k#1 ]
|
|
[ opcode#12 ]
|
|
Allocated zp ZP_BYTE:2 [ popup_selector::k#2 popup_selector::k#1 ]
|
|
Allocated zp ZP_BYTE:3 [ opcode#12 ]
|
|
|
|
INITIAL ASM
|
|
Target platform is c64basic / MOS6502X
|
|
// File Comments
|
|
// Demonstrates a problem where constant loophead unrolling results in an error
|
|
// The result is a NullPointerException
|
|
// The cause is that the Unroller does not handle the variable opcode correctly.
|
|
// The Unroller gets the verwions for opcode wrong because it misses the fact that it is modified inside call to popup_selector()
|
|
// Upstart
|
|
.pc = $801 "Basic"
|
|
:BasicUpstart(__bbegin)
|
|
.pc = $80d "Program"
|
|
// Global Constants & labels
|
|
.label screen = $400
|
|
.label opcode = 3
|
|
// @begin
|
|
__bbegin:
|
|
// [1] phi from @begin to @1 [phi:@begin->@1]
|
|
__b1_from___bbegin:
|
|
jmp __b1
|
|
// @1
|
|
__b1:
|
|
// [2] call main
|
|
jsr main
|
|
// [3] phi from @1 to @end [phi:@1->@end]
|
|
__bend_from___b1:
|
|
jmp __bend
|
|
// @end
|
|
__bend:
|
|
// main
|
|
// Offending unroll variable
|
|
main: {
|
|
// [4] *((const byte*) screen+(byte) $28) ← (byte) 'a' -- _deref_pbuc1=vbuc2
|
|
lda #'a'
|
|
sta screen+$28
|
|
// [5] call popup_selector
|
|
// [8] phi from main to popup_selector [phi:main->popup_selector]
|
|
popup_selector_from_main:
|
|
jsr popup_selector
|
|
jmp __b1
|
|
// main::@1
|
|
__b1:
|
|
// [6] *((const byte*) screen+(byte) $29) ← (byte) opcode#12 -- _deref_pbuc1=vbuz1
|
|
lda.z opcode
|
|
sta screen+$29
|
|
jmp __breturn
|
|
// main::@return
|
|
__breturn:
|
|
// [7] return
|
|
rts
|
|
}
|
|
// popup_selector
|
|
popup_selector: {
|
|
.label k = 2
|
|
// [9] phi from popup_selector to popup_selector::@1 [phi:popup_selector->popup_selector::@1]
|
|
__b1_from_popup_selector:
|
|
// [9] phi (byte) opcode#12 = (byte) 'a' [phi:popup_selector->popup_selector::@1#0] -- vbuz1=vbuc1
|
|
lda #'a'
|
|
sta.z opcode
|
|
// [9] phi (byte) popup_selector::k#2 = (byte) 0 [phi:popup_selector->popup_selector::@1#1] -- vbuz1=vbuc1
|
|
lda #0
|
|
sta.z k
|
|
jmp __b1
|
|
// popup_selector::@1
|
|
__b1:
|
|
// [10] if((byte) popup_selector::k#2<(byte) 2+(byte) 1) goto popup_selector::@2 -- vbuz1_lt_vbuc1_then_la1
|
|
lda.z k
|
|
cmp #2+1
|
|
bcc __b2
|
|
jmp __breturn
|
|
// popup_selector::@return
|
|
__breturn:
|
|
// [11] return
|
|
rts
|
|
// popup_selector::@2
|
|
__b2:
|
|
// [12] *((const byte*) screen + (byte) popup_selector::k#2) ← (byte) 'b' -- pbuc1_derefidx_vbuz1=vbuc2
|
|
lda #'b'
|
|
ldy.z k
|
|
sta screen,y
|
|
// [13] (byte) popup_selector::k#1 ← ++ (byte) popup_selector::k#2 -- vbuz1=_inc_vbuz1
|
|
inc.z k
|
|
// [9] phi from popup_selector::@2 to popup_selector::@1 [phi:popup_selector::@2->popup_selector::@1]
|
|
__b1_from___b2:
|
|
// [9] phi (byte) opcode#12 = (byte) 'b' [phi:popup_selector::@2->popup_selector::@1#0] -- vbuz1=vbuc1
|
|
lda #'b'
|
|
sta.z opcode
|
|
// [9] phi (byte) popup_selector::k#2 = (byte) popup_selector::k#1 [phi:popup_selector::@2->popup_selector::@1#1] -- register_copy
|
|
jmp __b1
|
|
}
|
|
// File Data
|
|
|
|
REGISTER UPLIFT POTENTIAL REGISTERS
|
|
Statement [4] *((const byte*) screen+(byte) $28) ← (byte) 'a' [ ] ( main:2 [ ] ) always clobbers reg byte a
|
|
Statement [12] *((const byte*) screen + (byte) popup_selector::k#2) ← (byte) 'b' [ popup_selector::k#2 ] ( main:2::popup_selector:5 [ popup_selector::k#2 ] ) always clobbers reg byte a
|
|
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ popup_selector::k#2 popup_selector::k#1 ]
|
|
Statement [4] *((const byte*) screen+(byte) $28) ← (byte) 'a' [ ] ( main:2 [ ] ) always clobbers reg byte a
|
|
Statement [12] *((const byte*) screen + (byte) popup_selector::k#2) ← (byte) 'b' [ popup_selector::k#2 ] ( main:2::popup_selector:5 [ popup_selector::k#2 ] ) always clobbers reg byte a
|
|
Potential registers zp ZP_BYTE:2 [ popup_selector::k#2 popup_selector::k#1 ] : zp ZP_BYTE:2 , reg byte x , reg byte y ,
|
|
Potential registers zp ZP_BYTE:3 [ opcode#12 ] : zp ZP_BYTE:3 , reg byte a , reg byte x , reg byte y ,
|
|
|
|
REGISTER UPLIFT SCOPES
|
|
Uplift Scope [popup_selector] 36.67: zp ZP_BYTE:2 [ popup_selector::k#2 popup_selector::k#1 ]
|
|
Uplift Scope [] 0.5: zp ZP_BYTE:3 [ opcode#12 ]
|
|
Uplift Scope [main]
|
|
|
|
Uplifting [popup_selector] best 394 combination reg byte x [ popup_selector::k#2 popup_selector::k#1 ]
|
|
Uplifting [] best 331 combination reg byte a [ opcode#12 ]
|
|
Uplifting [main] best 331 combination
|
|
|
|
ASSEMBLER BEFORE OPTIMIZATION
|
|
// File Comments
|
|
// Demonstrates a problem where constant loophead unrolling results in an error
|
|
// The result is a NullPointerException
|
|
// The cause is that the Unroller does not handle the variable opcode correctly.
|
|
// The Unroller gets the verwions for opcode wrong because it misses the fact that it is modified inside call to popup_selector()
|
|
// Upstart
|
|
.pc = $801 "Basic"
|
|
:BasicUpstart(__bbegin)
|
|
.pc = $80d "Program"
|
|
// Global Constants & labels
|
|
.label screen = $400
|
|
// @begin
|
|
__bbegin:
|
|
// [1] phi from @begin to @1 [phi:@begin->@1]
|
|
__b1_from___bbegin:
|
|
jmp __b1
|
|
// @1
|
|
__b1:
|
|
// [2] call main
|
|
jsr main
|
|
// [3] phi from @1 to @end [phi:@1->@end]
|
|
__bend_from___b1:
|
|
jmp __bend
|
|
// @end
|
|
__bend:
|
|
// main
|
|
// Offending unroll variable
|
|
main: {
|
|
// [4] *((const byte*) screen+(byte) $28) ← (byte) 'a' -- _deref_pbuc1=vbuc2
|
|
lda #'a'
|
|
sta screen+$28
|
|
// [5] call popup_selector
|
|
// [8] phi from main to popup_selector [phi:main->popup_selector]
|
|
popup_selector_from_main:
|
|
jsr popup_selector
|
|
jmp __b1
|
|
// main::@1
|
|
__b1:
|
|
// [6] *((const byte*) screen+(byte) $29) ← (byte) opcode#12 -- _deref_pbuc1=vbuaa
|
|
sta screen+$29
|
|
jmp __breturn
|
|
// main::@return
|
|
__breturn:
|
|
// [7] return
|
|
rts
|
|
}
|
|
// popup_selector
|
|
popup_selector: {
|
|
// [9] phi from popup_selector to popup_selector::@1 [phi:popup_selector->popup_selector::@1]
|
|
__b1_from_popup_selector:
|
|
// [9] phi (byte) opcode#12 = (byte) 'a' [phi:popup_selector->popup_selector::@1#0] -- vbuaa=vbuc1
|
|
lda #'a'
|
|
// [9] phi (byte) popup_selector::k#2 = (byte) 0 [phi:popup_selector->popup_selector::@1#1] -- vbuxx=vbuc1
|
|
ldx #0
|
|
jmp __b1
|
|
// popup_selector::@1
|
|
__b1:
|
|
// [10] if((byte) popup_selector::k#2<(byte) 2+(byte) 1) goto popup_selector::@2 -- vbuxx_lt_vbuc1_then_la1
|
|
cpx #2+1
|
|
bcc __b2
|
|
jmp __breturn
|
|
// popup_selector::@return
|
|
__breturn:
|
|
// [11] return
|
|
rts
|
|
// popup_selector::@2
|
|
__b2:
|
|
// [12] *((const byte*) screen + (byte) popup_selector::k#2) ← (byte) 'b' -- pbuc1_derefidx_vbuxx=vbuc2
|
|
lda #'b'
|
|
sta screen,x
|
|
// [13] (byte) popup_selector::k#1 ← ++ (byte) popup_selector::k#2 -- vbuxx=_inc_vbuxx
|
|
inx
|
|
// [9] phi from popup_selector::@2 to popup_selector::@1 [phi:popup_selector::@2->popup_selector::@1]
|
|
__b1_from___b2:
|
|
// [9] phi (byte) opcode#12 = (byte) 'b' [phi:popup_selector::@2->popup_selector::@1#0] -- vbuaa=vbuc1
|
|
lda #'b'
|
|
// [9] phi (byte) popup_selector::k#2 = (byte) popup_selector::k#1 [phi:popup_selector::@2->popup_selector::@1#1] -- register_copy
|
|
jmp __b1
|
|
}
|
|
// File Data
|
|
|
|
ASSEMBLER OPTIMIZATIONS
|
|
Removing instruction jmp __b1
|
|
Removing instruction jmp __bend
|
|
Removing instruction jmp __b1
|
|
Removing instruction jmp __breturn
|
|
Removing instruction jmp __b1
|
|
Removing instruction jmp __breturn
|
|
Succesful ASM optimization Pass5NextJumpElimination
|
|
Replacing label __bbegin with __b1
|
|
Removing instruction __bbegin:
|
|
Removing instruction __b1_from___bbegin:
|
|
Removing instruction __bend_from___b1:
|
|
Succesful ASM optimization Pass5RedundantLabelElimination
|
|
Removing instruction __bend:
|
|
Removing instruction popup_selector_from_main:
|
|
Removing instruction __b1:
|
|
Removing instruction __breturn:
|
|
Removing instruction __b1_from_popup_selector:
|
|
Removing instruction __breturn:
|
|
Removing instruction __b1_from___b2:
|
|
Succesful ASM optimization Pass5UnusedLabelElimination
|
|
Updating BasicUpstart to call main directly
|
|
Removing instruction jsr main
|
|
Succesful ASM optimization Pass5SkipBegin
|
|
Removing instruction lda #'b'
|
|
Succesful ASM optimization Pass5UnnecesaryLoadElimination
|
|
Removing instruction __b1:
|
|
Succesful ASM optimization Pass5UnusedLabelElimination
|
|
|
|
FINAL SYMBOL TABLE
|
|
(label) @1
|
|
(label) @begin
|
|
(label) @end
|
|
(void()) main()
|
|
(label) main::@1
|
|
(label) main::@return
|
|
(byte) opcode
|
|
(byte) opcode#12 reg byte a 0.5
|
|
(void()) popup_selector()
|
|
(label) popup_selector::@1
|
|
(label) popup_selector::@2
|
|
(label) popup_selector::@return
|
|
(byte) popup_selector::k
|
|
(byte) popup_selector::k#1 reg byte x 22.0
|
|
(byte) popup_selector::k#2 reg byte x 14.666666666666666
|
|
(const byte*) screen screen = (byte*) 1024
|
|
|
|
reg byte x [ popup_selector::k#2 popup_selector::k#1 ]
|
|
reg byte a [ opcode#12 ]
|
|
|
|
|
|
FINAL ASSEMBLER
|
|
Score: 233
|
|
|
|
// File Comments
|
|
// Demonstrates a problem where constant loophead unrolling results in an error
|
|
// The result is a NullPointerException
|
|
// The cause is that the Unroller does not handle the variable opcode correctly.
|
|
// The Unroller gets the verwions for opcode wrong because it misses the fact that it is modified inside call to popup_selector()
|
|
// Upstart
|
|
.pc = $801 "Basic"
|
|
:BasicUpstart(main)
|
|
.pc = $80d "Program"
|
|
// Global Constants & labels
|
|
.label screen = $400
|
|
// @begin
|
|
// [1] phi from @begin to @1 [phi:@begin->@1]
|
|
// @1
|
|
// [2] call main
|
|
// [3] phi from @1 to @end [phi:@1->@end]
|
|
// @end
|
|
// main
|
|
// Offending unroll variable
|
|
main: {
|
|
// screen[40] = opcode
|
|
// [4] *((const byte*) screen+(byte) $28) ← (byte) 'a' -- _deref_pbuc1=vbuc2
|
|
lda #'a'
|
|
sta screen+$28
|
|
// popup_selector()
|
|
// [5] call popup_selector
|
|
// [8] phi from main to popup_selector [phi:main->popup_selector]
|
|
jsr popup_selector
|
|
// main::@1
|
|
// screen[41] = opcode
|
|
// [6] *((const byte*) screen+(byte) $29) ← (byte) opcode#12 -- _deref_pbuc1=vbuaa
|
|
sta screen+$29
|
|
// main::@return
|
|
// }
|
|
// [7] return
|
|
rts
|
|
}
|
|
// popup_selector
|
|
popup_selector: {
|
|
// [9] phi from popup_selector to popup_selector::@1 [phi:popup_selector->popup_selector::@1]
|
|
// [9] phi (byte) opcode#12 = (byte) 'a' [phi:popup_selector->popup_selector::@1#0] -- vbuaa=vbuc1
|
|
lda #'a'
|
|
// [9] phi (byte) popup_selector::k#2 = (byte) 0 [phi:popup_selector->popup_selector::@1#1] -- vbuxx=vbuc1
|
|
ldx #0
|
|
// popup_selector::@1
|
|
__b1:
|
|
// for (byte k = 0; k <= 2; k++)
|
|
// [10] if((byte) popup_selector::k#2<(byte) 2+(byte) 1) goto popup_selector::@2 -- vbuxx_lt_vbuc1_then_la1
|
|
cpx #2+1
|
|
bcc __b2
|
|
// popup_selector::@return
|
|
// }
|
|
// [11] return
|
|
rts
|
|
// popup_selector::@2
|
|
__b2:
|
|
// screen[k] = opcode
|
|
// [12] *((const byte*) screen + (byte) popup_selector::k#2) ← (byte) 'b' -- pbuc1_derefidx_vbuxx=vbuc2
|
|
lda #'b'
|
|
sta screen,x
|
|
// for (byte k = 0; k <= 2; k++)
|
|
// [13] (byte) popup_selector::k#1 ← ++ (byte) popup_selector::k#2 -- vbuxx=_inc_vbuxx
|
|
inx
|
|
// [9] phi from popup_selector::@2 to popup_selector::@1 [phi:popup_selector::@2->popup_selector::@1]
|
|
// [9] phi (byte) opcode#12 = (byte) 'b' [phi:popup_selector::@2->popup_selector::@1#0] -- vbuaa=vbuc1
|
|
// [9] phi (byte) popup_selector::k#2 = (byte) popup_selector::k#1 [phi:popup_selector::@2->popup_selector::@1#1] -- register_copy
|
|
jmp __b1
|
|
}
|
|
// File Data
|
|
|