mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-09-30 09:57:11 +00:00
628 lines
18 KiB
Plaintext
628 lines
18 KiB
Plaintext
Culled Empty Block (label) malloc::@1
|
|
|
|
CONTROL FLOW GRAPH SSA
|
|
@begin: scope:[] from
|
|
(byte*) MEM#0 ← ((byte*)) (number) $400
|
|
to:@1
|
|
|
|
(byte*()) malloc()
|
|
malloc: scope:[malloc] from @1 @3
|
|
(byte*) MEM#5 ← phi( @1/(byte*) MEM#9 @3/(byte*) MEM#3 )
|
|
(byte*) MEM#1 ← ++ (byte*) MEM#5
|
|
(byte*) malloc::return#0 ← (byte*) MEM#1
|
|
to:malloc::@return
|
|
malloc::@return: scope:[malloc] from malloc
|
|
(byte*) MEM#6 ← phi( malloc/(byte*) MEM#1 )
|
|
(byte*) malloc::return#4 ← phi( malloc/(byte*) malloc::return#0 )
|
|
(byte*) malloc::return#1 ← (byte*) malloc::return#4
|
|
(byte*) MEM#2 ← (byte*) MEM#6
|
|
return
|
|
to:@return
|
|
@1: scope:[] from @begin
|
|
(byte*) MEM#9 ← phi( @begin/(byte*) MEM#0 )
|
|
call malloc
|
|
(byte*) malloc::return#2 ← (byte*) malloc::return#1
|
|
to:@3
|
|
@3: scope:[] from @1
|
|
(byte*) MEM#7 ← phi( @1/(byte*) MEM#2 )
|
|
(byte*) malloc::return#5 ← phi( @1/(byte*) malloc::return#2 )
|
|
(byte*~) $0 ← (byte*) malloc::return#5
|
|
(byte*) MEM#3 ← (byte*) MEM#7
|
|
(byte*) SCREEN_1#0 ← (byte*~) $0
|
|
call malloc
|
|
(byte*) malloc::return#3 ← (byte*) malloc::return#1
|
|
to:@4
|
|
@4: scope:[] from @3
|
|
(byte*) SCREEN_1#3 ← phi( @3/(byte*) SCREEN_1#0 )
|
|
(byte*) MEM#8 ← phi( @3/(byte*) MEM#2 )
|
|
(byte*) malloc::return#6 ← phi( @3/(byte*) malloc::return#3 )
|
|
(byte*~) $1 ← (byte*) malloc::return#6
|
|
(byte*) MEM#4 ← (byte*) MEM#8
|
|
(byte*) SCREEN_2#0 ← (byte*~) $1
|
|
to:@2
|
|
|
|
(void()) main()
|
|
main: scope:[main] from @2
|
|
(byte*) SCREEN_2#1 ← phi( @2/(byte*) SCREEN_2#2 )
|
|
(byte*) SCREEN_1#1 ← phi( @2/(byte*) SCREEN_1#2 )
|
|
*((byte*) SCREEN_1#1) ← (number) 0
|
|
*((byte*) SCREEN_2#1) ← (number) 0
|
|
to:main::@return
|
|
main::@return: scope:[main] from main
|
|
return
|
|
to:@return
|
|
@2: scope:[] from @4
|
|
(byte*) SCREEN_2#2 ← phi( @4/(byte*) SCREEN_2#0 )
|
|
(byte*) SCREEN_1#2 ← phi( @4/(byte*) SCREEN_1#3 )
|
|
call main
|
|
to:@5
|
|
@5: scope:[] from @2
|
|
to:@end
|
|
@end: scope:[] from @5
|
|
|
|
SYMBOL TABLE SSA
|
|
(byte*~) $0
|
|
(byte*~) $1
|
|
(label) @1
|
|
(label) @2
|
|
(label) @3
|
|
(label) @4
|
|
(label) @5
|
|
(label) @begin
|
|
(label) @end
|
|
(byte*) MEM
|
|
(byte*) MEM#0
|
|
(byte*) MEM#1
|
|
(byte*) MEM#2
|
|
(byte*) MEM#3
|
|
(byte*) MEM#4
|
|
(byte*) MEM#5
|
|
(byte*) MEM#6
|
|
(byte*) MEM#7
|
|
(byte*) MEM#8
|
|
(byte*) MEM#9
|
|
(byte*) SCREEN_1
|
|
(byte*) SCREEN_1#0
|
|
(byte*) SCREEN_1#1
|
|
(byte*) SCREEN_1#2
|
|
(byte*) SCREEN_1#3
|
|
(byte*) SCREEN_2
|
|
(byte*) SCREEN_2#0
|
|
(byte*) SCREEN_2#1
|
|
(byte*) SCREEN_2#2
|
|
(void()) main()
|
|
(label) main::@return
|
|
(byte*()) malloc()
|
|
(label) malloc::@return
|
|
(byte*) malloc::return
|
|
(byte*) malloc::return#0
|
|
(byte*) malloc::return#1
|
|
(byte*) malloc::return#2
|
|
(byte*) malloc::return#3
|
|
(byte*) malloc::return#4
|
|
(byte*) malloc::return#5
|
|
(byte*) malloc::return#6
|
|
|
|
Adding number conversion cast (unumber) 0 in *((byte*) SCREEN_1#1) ← (number) 0
|
|
Adding number conversion cast (unumber) 0 in *((byte*) SCREEN_2#1) ← (number) 0
|
|
Successful SSA optimization PassNAddNumberTypeConversions
|
|
Inlining cast (byte*) MEM#0 ← (byte*)(number) $400
|
|
Inlining cast *((byte*) SCREEN_1#1) ← (unumber)(number) 0
|
|
Inlining cast *((byte*) SCREEN_2#1) ← (unumber)(number) 0
|
|
Successful SSA optimization Pass2InlineCast
|
|
Simplifying constant pointer cast (byte*) 1024
|
|
Simplifying constant integer cast 0
|
|
Simplifying constant integer cast 0
|
|
Successful SSA optimization PassNCastSimplification
|
|
Finalized unsigned number type (byte) 0
|
|
Finalized unsigned number type (byte) 0
|
|
Successful SSA optimization PassNFinalizeNumberTypeConversions
|
|
Alias (byte*) malloc::return#0 = (byte*) malloc::return#4 (byte*) malloc::return#1
|
|
Alias (byte*) MEM#1 = (byte*) MEM#6 (byte*) MEM#2
|
|
Alias (byte*) MEM#0 = (byte*) MEM#9
|
|
Alias (byte*) malloc::return#2 = (byte*) malloc::return#5
|
|
Alias (byte*) MEM#3 = (byte*) MEM#7
|
|
Alias (byte*) SCREEN_1#0 = (byte*~) $0 (byte*) SCREEN_1#3 (byte*) SCREEN_1#2
|
|
Alias (byte*) malloc::return#3 = (byte*) malloc::return#6
|
|
Alias (byte*) MEM#4 = (byte*) MEM#8
|
|
Alias (byte*) SCREEN_2#0 = (byte*~) $1 (byte*) SCREEN_2#2
|
|
Successful SSA optimization Pass2AliasElimination
|
|
Identical Phi Values (byte*) MEM#3 (byte*) MEM#1
|
|
Identical Phi Values (byte*) MEM#4 (byte*) MEM#1
|
|
Identical Phi Values (byte*) SCREEN_1#1 (byte*) SCREEN_1#0
|
|
Identical Phi Values (byte*) SCREEN_2#1 (byte*) SCREEN_2#0
|
|
Successful SSA optimization Pass2IdenticalPhiElimination
|
|
Constant (const byte*) MEM#0 = (byte*) 1024
|
|
Successful SSA optimization Pass2ConstantIdentification
|
|
Inlining constant with var siblings (const byte*) MEM#0
|
|
Constant inlined MEM#0 = (byte*) 1024
|
|
Successful SSA optimization Pass2ConstantInlining
|
|
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 @5
|
|
Adding NOP phi() at start of @end
|
|
CALL GRAPH
|
|
Calls in [] to malloc:2 malloc:6 main:10
|
|
|
|
Created 1 initial phi equivalence classes
|
|
Coalesced [5] MEM#10 ← MEM#1
|
|
Coalesced down to 1 phi equivalence classes
|
|
Culled Empty Block (label) @5
|
|
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
|
|
|
|
FINAL CONTROL FLOW GRAPH
|
|
@begin: scope:[] from
|
|
[0] phi()
|
|
to:@1
|
|
@1: scope:[] from @begin
|
|
[1] phi()
|
|
[2] call malloc
|
|
[3] (byte*) malloc::return#2 ← (byte*) malloc::return#0
|
|
to:@3
|
|
@3: scope:[] from @1
|
|
[4] (byte*) SCREEN_1#0 ← (byte*) malloc::return#2
|
|
[5] call malloc
|
|
[6] (byte*) malloc::return#3 ← (byte*) malloc::return#0
|
|
to:@4
|
|
@4: scope:[] from @3
|
|
[7] (byte*) SCREEN_2#0 ← (byte*) malloc::return#3
|
|
to:@2
|
|
@2: scope:[] from @4
|
|
[8] phi()
|
|
[9] call main
|
|
to:@end
|
|
@end: scope:[] from @2
|
|
[10] phi()
|
|
|
|
(void()) main()
|
|
main: scope:[main] from @2
|
|
[11] *((byte*) SCREEN_1#0) ← (byte) 0
|
|
[12] *((byte*) SCREEN_2#0) ← (byte) 0
|
|
to:main::@return
|
|
main::@return: scope:[main] from main
|
|
[13] return
|
|
to:@return
|
|
|
|
(byte*()) malloc()
|
|
malloc: scope:[malloc] from @1 @3
|
|
[14] (byte*) MEM#5 ← phi( @1/(byte*) 1024 @3/(byte*) MEM#1 )
|
|
[15] (byte*) MEM#1 ← ++ (byte*) MEM#5
|
|
[16] (byte*) malloc::return#0 ← (byte*) MEM#1
|
|
to:malloc::@return
|
|
malloc::@return: scope:[malloc] from malloc
|
|
[17] return
|
|
to:@return
|
|
|
|
|
|
VARIABLE REGISTER WEIGHTS
|
|
(byte*) MEM
|
|
(byte*) MEM#1 1.0
|
|
(byte*) MEM#5 4.0
|
|
(byte*) SCREEN_1
|
|
(byte*) SCREEN_1#0 0.8
|
|
(byte*) SCREEN_2
|
|
(byte*) SCREEN_2#0 1.3333333333333333
|
|
(void()) main()
|
|
(byte*()) malloc()
|
|
(byte*) malloc::return
|
|
(byte*) malloc::return#0 1.5
|
|
(byte*) malloc::return#2 4.0
|
|
(byte*) malloc::return#3 4.0
|
|
|
|
Initial phi equivalence classes
|
|
[ MEM#5 MEM#1 ]
|
|
Added variable malloc::return#2 to zero page equivalence class [ malloc::return#2 ]
|
|
Added variable SCREEN_1#0 to zero page equivalence class [ SCREEN_1#0 ]
|
|
Added variable malloc::return#3 to zero page equivalence class [ malloc::return#3 ]
|
|
Added variable SCREEN_2#0 to zero page equivalence class [ SCREEN_2#0 ]
|
|
Added variable malloc::return#0 to zero page equivalence class [ malloc::return#0 ]
|
|
Complete equivalence classes
|
|
[ MEM#5 MEM#1 ]
|
|
[ malloc::return#2 ]
|
|
[ SCREEN_1#0 ]
|
|
[ malloc::return#3 ]
|
|
[ SCREEN_2#0 ]
|
|
[ malloc::return#0 ]
|
|
Allocated zp[2]:2 [ MEM#5 MEM#1 ]
|
|
Allocated zp[2]:4 [ malloc::return#2 ]
|
|
Allocated zp[2]:6 [ SCREEN_1#0 ]
|
|
Allocated zp[2]:8 [ malloc::return#3 ]
|
|
Allocated zp[2]:10 [ SCREEN_2#0 ]
|
|
Allocated zp[2]:12 [ malloc::return#0 ]
|
|
|
|
INITIAL ASM
|
|
Target platform is c64basic / MOS6502X
|
|
// File Comments
|
|
// Error where the compiler is reusing the same ZP for two byte* variables.
|
|
// SCREEN_1 and SCREEN_2 are both allocated to ZP: 4
|
|
// Problem is that outside main() scope statements have zero call-paths and then isStatementAllocationOverlapping() never checks liveranges
|
|
// CallPath code must be rewritten to use @begin as the outermost call instead of main()
|
|
// Upstart
|
|
.pc = $801 "Basic"
|
|
:BasicUpstart(__bbegin)
|
|
.pc = $80d "Program"
|
|
// Global Constants & labels
|
|
.label MEM = 2
|
|
.label SCREEN_1 = 6
|
|
.label SCREEN_2 = $a
|
|
// @begin
|
|
__bbegin:
|
|
// [1] phi from @begin to @1 [phi:@begin->@1]
|
|
__b1_from___bbegin:
|
|
jmp __b1
|
|
// @1
|
|
__b1:
|
|
// [2] call malloc
|
|
// [14] phi from @1 to malloc [phi:@1->malloc]
|
|
malloc_from___b1:
|
|
// [14] phi (byte*) MEM#5 = (byte*) 1024 [phi:@1->malloc#0] -- pbuz1=pbuc1
|
|
lda #<$400
|
|
sta.z MEM
|
|
lda #>$400
|
|
sta.z MEM+1
|
|
jsr malloc
|
|
// [3] (byte*) malloc::return#2 ← (byte*) malloc::return#0 -- pbuz1=pbuz2
|
|
lda.z malloc.return
|
|
sta.z malloc.return_1
|
|
lda.z malloc.return+1
|
|
sta.z malloc.return_1+1
|
|
jmp __b3
|
|
// @3
|
|
__b3:
|
|
// [4] (byte*) SCREEN_1#0 ← (byte*) malloc::return#2 -- pbuz1=pbuz2
|
|
lda.z malloc.return_1
|
|
sta.z SCREEN_1
|
|
lda.z malloc.return_1+1
|
|
sta.z SCREEN_1+1
|
|
// [5] call malloc
|
|
// [14] phi from @3 to malloc [phi:@3->malloc]
|
|
malloc_from___b3:
|
|
// [14] phi (byte*) MEM#5 = (byte*) MEM#1 [phi:@3->malloc#0] -- register_copy
|
|
jsr malloc
|
|
// [6] (byte*) malloc::return#3 ← (byte*) malloc::return#0 -- pbuz1=pbuz2
|
|
lda.z malloc.return
|
|
sta.z malloc.return_2
|
|
lda.z malloc.return+1
|
|
sta.z malloc.return_2+1
|
|
jmp __b4
|
|
// @4
|
|
__b4:
|
|
// [7] (byte*) SCREEN_2#0 ← (byte*) malloc::return#3 -- pbuz1=pbuz2
|
|
lda.z malloc.return_2
|
|
sta.z SCREEN_2
|
|
lda.z malloc.return_2+1
|
|
sta.z SCREEN_2+1
|
|
// [8] phi from @4 to @2 [phi:@4->@2]
|
|
__b2_from___b4:
|
|
jmp __b2
|
|
// @2
|
|
__b2:
|
|
// [9] call main
|
|
jsr main
|
|
// [10] phi from @2 to @end [phi:@2->@end]
|
|
__bend_from___b2:
|
|
jmp __bend
|
|
// @end
|
|
__bend:
|
|
// main
|
|
main: {
|
|
// [11] *((byte*) SCREEN_1#0) ← (byte) 0 -- _deref_pbuz1=vbuc1
|
|
lda #0
|
|
ldy #0
|
|
sta (SCREEN_1),y
|
|
// [12] *((byte*) SCREEN_2#0) ← (byte) 0 -- _deref_pbuz1=vbuc1
|
|
lda #0
|
|
ldy #0
|
|
sta (SCREEN_2),y
|
|
jmp __breturn
|
|
// main::@return
|
|
__breturn:
|
|
// [13] return
|
|
rts
|
|
}
|
|
// malloc
|
|
malloc: {
|
|
.label return = $c
|
|
.label return_1 = 4
|
|
.label return_2 = 8
|
|
// [15] (byte*) MEM#1 ← ++ (byte*) MEM#5 -- pbuz1=_inc_pbuz1
|
|
inc.z MEM
|
|
bne !+
|
|
inc.z MEM+1
|
|
!:
|
|
// [16] (byte*) malloc::return#0 ← (byte*) MEM#1 -- pbuz1=pbuz2
|
|
lda.z MEM
|
|
sta.z return
|
|
lda.z MEM+1
|
|
sta.z return+1
|
|
jmp __breturn
|
|
// malloc::@return
|
|
__breturn:
|
|
// [17] return
|
|
rts
|
|
}
|
|
// File Data
|
|
|
|
REGISTER UPLIFT POTENTIAL REGISTERS
|
|
Statement [3] (byte*) malloc::return#2 ← (byte*) malloc::return#0 [ malloc::return#2 MEM#1 ] ( [ malloc::return#2 MEM#1 ] ) always clobbers reg byte a
|
|
Statement [4] (byte*) SCREEN_1#0 ← (byte*) malloc::return#2 [ SCREEN_1#0 MEM#1 ] ( [ SCREEN_1#0 MEM#1 ] ) always clobbers reg byte a
|
|
Statement [6] (byte*) malloc::return#3 ← (byte*) malloc::return#0 [ SCREEN_1#0 malloc::return#3 ] ( [ SCREEN_1#0 malloc::return#3 ] ) always clobbers reg byte a
|
|
Statement [7] (byte*) SCREEN_2#0 ← (byte*) malloc::return#3 [ SCREEN_1#0 SCREEN_2#0 ] ( [ SCREEN_1#0 SCREEN_2#0 ] ) always clobbers reg byte a
|
|
Statement [11] *((byte*) SCREEN_1#0) ← (byte) 0 [ SCREEN_2#0 ] ( main:9 [ SCREEN_2#0 ] ) always clobbers reg byte a reg byte y
|
|
Statement [12] *((byte*) SCREEN_2#0) ← (byte) 0 [ ] ( main:9 [ ] ) always clobbers reg byte a reg byte y
|
|
Statement [16] (byte*) malloc::return#0 ← (byte*) MEM#1 [ malloc::return#0 MEM#1 ] ( malloc:2 [ malloc::return#0 MEM#1 ] malloc:5 [ malloc::return#0 MEM#1 ] ) always clobbers reg byte a
|
|
Potential registers zp[2]:2 [ MEM#5 MEM#1 ] : zp[2]:2 ,
|
|
Potential registers zp[2]:4 [ malloc::return#2 ] : zp[2]:4 ,
|
|
Potential registers zp[2]:6 [ SCREEN_1#0 ] : zp[2]:6 ,
|
|
Potential registers zp[2]:8 [ malloc::return#3 ] : zp[2]:8 ,
|
|
Potential registers zp[2]:10 [ SCREEN_2#0 ] : zp[2]:10 ,
|
|
Potential registers zp[2]:12 [ malloc::return#0 ] : zp[2]:12 ,
|
|
|
|
REGISTER UPLIFT SCOPES
|
|
Uplift Scope [malloc] 4: zp[2]:4 [ malloc::return#2 ] 4: zp[2]:8 [ malloc::return#3 ] 1.5: zp[2]:12 [ malloc::return#0 ]
|
|
Uplift Scope [] 5: zp[2]:2 [ MEM#5 MEM#1 ] 1.33: zp[2]:10 [ SCREEN_2#0 ] 0.8: zp[2]:6 [ SCREEN_1#0 ]
|
|
Uplift Scope [main]
|
|
|
|
Uplifting [malloc] best 153 combination zp[2]:4 [ malloc::return#2 ] zp[2]:8 [ malloc::return#3 ] zp[2]:12 [ malloc::return#0 ]
|
|
Uplifting [] best 153 combination zp[2]:2 [ MEM#5 MEM#1 ] zp[2]:10 [ SCREEN_2#0 ] zp[2]:6 [ SCREEN_1#0 ]
|
|
Uplifting [main] best 153 combination
|
|
Coalescing zero page register [ zp[2]:4 [ malloc::return#2 ] ] with [ zp[2]:6 [ SCREEN_1#0 ] ] - score: 1
|
|
Coalescing zero page register [ zp[2]:8 [ malloc::return#3 ] ] with [ zp[2]:10 [ SCREEN_2#0 ] ] - score: 1
|
|
Coalescing zero page register [ zp[2]:8 [ malloc::return#3 SCREEN_2#0 ] ] with [ zp[2]:12 [ malloc::return#0 ] ] - score: 1
|
|
Allocated (was zp[2]:8) zp[2]:6 [ malloc::return#3 SCREEN_2#0 malloc::return#0 ]
|
|
|
|
ASSEMBLER BEFORE OPTIMIZATION
|
|
// File Comments
|
|
// Error where the compiler is reusing the same ZP for two byte* variables.
|
|
// SCREEN_1 and SCREEN_2 are both allocated to ZP: 4
|
|
// Problem is that outside main() scope statements have zero call-paths and then isStatementAllocationOverlapping() never checks liveranges
|
|
// CallPath code must be rewritten to use @begin as the outermost call instead of main()
|
|
// Upstart
|
|
.pc = $801 "Basic"
|
|
:BasicUpstart(__bbegin)
|
|
.pc = $80d "Program"
|
|
// Global Constants & labels
|
|
.label MEM = 2
|
|
.label SCREEN_1 = 4
|
|
.label SCREEN_2 = 6
|
|
// @begin
|
|
__bbegin:
|
|
// [1] phi from @begin to @1 [phi:@begin->@1]
|
|
__b1_from___bbegin:
|
|
jmp __b1
|
|
// @1
|
|
__b1:
|
|
// [2] call malloc
|
|
// [14] phi from @1 to malloc [phi:@1->malloc]
|
|
malloc_from___b1:
|
|
// [14] phi (byte*) MEM#5 = (byte*) 1024 [phi:@1->malloc#0] -- pbuz1=pbuc1
|
|
lda #<$400
|
|
sta.z MEM
|
|
lda #>$400
|
|
sta.z MEM+1
|
|
jsr malloc
|
|
// [3] (byte*) malloc::return#2 ← (byte*) malloc::return#0 -- pbuz1=pbuz2
|
|
lda.z malloc.return
|
|
sta.z malloc.return_1
|
|
lda.z malloc.return+1
|
|
sta.z malloc.return_1+1
|
|
jmp __b3
|
|
// @3
|
|
__b3:
|
|
// [4] (byte*) SCREEN_1#0 ← (byte*) malloc::return#2
|
|
// [5] call malloc
|
|
// [14] phi from @3 to malloc [phi:@3->malloc]
|
|
malloc_from___b3:
|
|
// [14] phi (byte*) MEM#5 = (byte*) MEM#1 [phi:@3->malloc#0] -- register_copy
|
|
jsr malloc
|
|
// [6] (byte*) malloc::return#3 ← (byte*) malloc::return#0
|
|
jmp __b4
|
|
// @4
|
|
__b4:
|
|
// [7] (byte*) SCREEN_2#0 ← (byte*) malloc::return#3
|
|
// [8] phi from @4 to @2 [phi:@4->@2]
|
|
__b2_from___b4:
|
|
jmp __b2
|
|
// @2
|
|
__b2:
|
|
// [9] call main
|
|
jsr main
|
|
// [10] phi from @2 to @end [phi:@2->@end]
|
|
__bend_from___b2:
|
|
jmp __bend
|
|
// @end
|
|
__bend:
|
|
// main
|
|
main: {
|
|
// [11] *((byte*) SCREEN_1#0) ← (byte) 0 -- _deref_pbuz1=vbuc1
|
|
lda #0
|
|
ldy #0
|
|
sta (SCREEN_1),y
|
|
// [12] *((byte*) SCREEN_2#0) ← (byte) 0 -- _deref_pbuz1=vbuc1
|
|
lda #0
|
|
ldy #0
|
|
sta (SCREEN_2),y
|
|
jmp __breturn
|
|
// main::@return
|
|
__breturn:
|
|
// [13] return
|
|
rts
|
|
}
|
|
// malloc
|
|
malloc: {
|
|
.label return = 6
|
|
.label return_1 = 4
|
|
// [15] (byte*) MEM#1 ← ++ (byte*) MEM#5 -- pbuz1=_inc_pbuz1
|
|
inc.z MEM
|
|
bne !+
|
|
inc.z MEM+1
|
|
!:
|
|
// [16] (byte*) malloc::return#0 ← (byte*) MEM#1 -- pbuz1=pbuz2
|
|
lda.z MEM
|
|
sta.z return
|
|
lda.z MEM+1
|
|
sta.z return+1
|
|
jmp __breturn
|
|
// malloc::@return
|
|
__breturn:
|
|
// [17] return
|
|
rts
|
|
}
|
|
// File Data
|
|
|
|
ASSEMBLER OPTIMIZATIONS
|
|
Removing instruction jmp __b1
|
|
Removing instruction jmp __b3
|
|
Removing instruction jmp __b4
|
|
Removing instruction jmp __b2
|
|
Removing instruction jmp __bend
|
|
Removing instruction jmp __breturn
|
|
Removing instruction jmp __breturn
|
|
Succesful ASM optimization Pass5NextJumpElimination
|
|
Replacing instruction ldy #0 with TAY
|
|
Removing instruction lda #0
|
|
Removing instruction ldy #0
|
|
Succesful ASM optimization Pass5UnnecesaryLoadElimination
|
|
Replacing label __bbegin with __b1
|
|
Removing instruction __bbegin:
|
|
Removing instruction __b1_from___bbegin:
|
|
Removing instruction malloc_from___b1:
|
|
Removing instruction malloc_from___b3:
|
|
Removing instruction __b4:
|
|
Removing instruction __b2_from___b4:
|
|
Removing instruction __bend_from___b2:
|
|
Succesful ASM optimization Pass5RedundantLabelElimination
|
|
Removing instruction __b3:
|
|
Removing instruction __b2:
|
|
Removing instruction __bend:
|
|
Removing instruction __breturn:
|
|
Removing instruction __breturn:
|
|
Succesful ASM optimization Pass5UnusedLabelElimination
|
|
Adding RTS to root block
|
|
Succesful ASM optimization Pass5AddMainRts
|
|
|
|
FINAL SYMBOL TABLE
|
|
(label) @1
|
|
(label) @2
|
|
(label) @3
|
|
(label) @4
|
|
(label) @begin
|
|
(label) @end
|
|
(byte*) MEM
|
|
(byte*) MEM#1 MEM zp[2]:2 1.0
|
|
(byte*) MEM#5 MEM zp[2]:2 4.0
|
|
(byte*) SCREEN_1
|
|
(byte*) SCREEN_1#0 SCREEN_1 zp[2]:4 0.8
|
|
(byte*) SCREEN_2
|
|
(byte*) SCREEN_2#0 SCREEN_2 zp[2]:6 1.3333333333333333
|
|
(void()) main()
|
|
(label) main::@return
|
|
(byte*()) malloc()
|
|
(label) malloc::@return
|
|
(byte*) malloc::return
|
|
(byte*) malloc::return#0 return zp[2]:6 1.5
|
|
(byte*) malloc::return#2 return_1 zp[2]:4 4.0
|
|
(byte*) malloc::return#3 return zp[2]:6 4.0
|
|
|
|
zp[2]:2 [ MEM#5 MEM#1 ]
|
|
zp[2]:4 [ malloc::return#2 SCREEN_1#0 ]
|
|
zp[2]:6 [ malloc::return#3 SCREEN_2#0 malloc::return#0 ]
|
|
|
|
|
|
FINAL ASSEMBLER
|
|
Score: 98
|
|
|
|
// File Comments
|
|
// Error where the compiler is reusing the same ZP for two byte* variables.
|
|
// SCREEN_1 and SCREEN_2 are both allocated to ZP: 4
|
|
// Problem is that outside main() scope statements have zero call-paths and then isStatementAllocationOverlapping() never checks liveranges
|
|
// CallPath code must be rewritten to use @begin as the outermost call instead of main()
|
|
// Upstart
|
|
.pc = $801 "Basic"
|
|
:BasicUpstart(__b1)
|
|
.pc = $80d "Program"
|
|
// Global Constants & labels
|
|
.label MEM = 2
|
|
.label SCREEN_1 = 4
|
|
.label SCREEN_2 = 6
|
|
// @begin
|
|
// [1] phi from @begin to @1 [phi:@begin->@1]
|
|
// @1
|
|
__b1:
|
|
// malloc()
|
|
// [2] call malloc
|
|
// [14] phi from @1 to malloc [phi:@1->malloc]
|
|
// [14] phi (byte*) MEM#5 = (byte*) 1024 [phi:@1->malloc#0] -- pbuz1=pbuc1
|
|
lda #<$400
|
|
sta.z MEM
|
|
lda #>$400
|
|
sta.z MEM+1
|
|
jsr malloc
|
|
// malloc()
|
|
// [3] (byte*) malloc::return#2 ← (byte*) malloc::return#0 -- pbuz1=pbuz2
|
|
lda.z malloc.return
|
|
sta.z malloc.return_1
|
|
lda.z malloc.return+1
|
|
sta.z malloc.return_1+1
|
|
// @3
|
|
// SCREEN_1 = malloc()
|
|
// [4] (byte*) SCREEN_1#0 ← (byte*) malloc::return#2
|
|
// malloc()
|
|
// [5] call malloc
|
|
// [14] phi from @3 to malloc [phi:@3->malloc]
|
|
// [14] phi (byte*) MEM#5 = (byte*) MEM#1 [phi:@3->malloc#0] -- register_copy
|
|
jsr malloc
|
|
// malloc()
|
|
// [6] (byte*) malloc::return#3 ← (byte*) malloc::return#0
|
|
// @4
|
|
// SCREEN_2 = malloc()
|
|
// [7] (byte*) SCREEN_2#0 ← (byte*) malloc::return#3
|
|
// [8] phi from @4 to @2 [phi:@4->@2]
|
|
// @2
|
|
// [9] call main
|
|
jsr main
|
|
rts
|
|
// [10] phi from @2 to @end [phi:@2->@end]
|
|
// @end
|
|
// main
|
|
main: {
|
|
// *SCREEN_1 = 0
|
|
// [11] *((byte*) SCREEN_1#0) ← (byte) 0 -- _deref_pbuz1=vbuc1
|
|
lda #0
|
|
tay
|
|
sta (SCREEN_1),y
|
|
// *SCREEN_2 = 0
|
|
// [12] *((byte*) SCREEN_2#0) ← (byte) 0 -- _deref_pbuz1=vbuc1
|
|
sta (SCREEN_2),y
|
|
// main::@return
|
|
// }
|
|
// [13] return
|
|
rts
|
|
}
|
|
// malloc
|
|
malloc: {
|
|
.label return = 6
|
|
.label return_1 = 4
|
|
// return ++MEM;
|
|
// [15] (byte*) MEM#1 ← ++ (byte*) MEM#5 -- pbuz1=_inc_pbuz1
|
|
inc.z MEM
|
|
bne !+
|
|
inc.z MEM+1
|
|
!:
|
|
// [16] (byte*) malloc::return#0 ← (byte*) MEM#1 -- pbuz1=pbuz2
|
|
lda.z MEM
|
|
sta.z return
|
|
lda.z MEM+1
|
|
sta.z return+1
|
|
// malloc::@return
|
|
// }
|
|
// [17] return
|
|
rts
|
|
}
|
|
// File Data
|
|
|