mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-09-29 03:56:15 +00:00
216 lines
6.8 KiB
Plaintext
216 lines
6.8 KiB
Plaintext
Setting struct to load/store in variable affected by address-of main::p2 = &point2
|
|
|
|
CONTROL FLOW GRAPH SSA
|
|
|
|
void main()
|
|
main: scope:[main] from __start
|
|
*main::p2 = memcpy(*(&point1), struct Point, SIZEOF_STRUCT_POINT)
|
|
SCREEN[0] = *((char *)&point2+OFFSET_STRUCT_POINT_X)
|
|
SCREEN[1] = *((char *)&point2+OFFSET_STRUCT_POINT_Y)
|
|
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
|
|
__constant char OFFSET_STRUCT_POINT_X = 0
|
|
__constant char OFFSET_STRUCT_POINT_Y = 1
|
|
__constant char * const SCREEN = (char *)$400
|
|
__constant char SIZEOF_STRUCT_POINT = 2
|
|
void __start()
|
|
void main()
|
|
__constant struct Point *main::p2 = &point2
|
|
__loadstore struct Point point1 = { x: 2, y: 3 }
|
|
__loadstore volatile struct Point point2 = {}
|
|
|
|
Adding number conversion cast (unumber) 0 in SCREEN[0] = *((char *)&point2+OFFSET_STRUCT_POINT_X)
|
|
Adding number conversion cast (unumber) 1 in SCREEN[1] = *((char *)&point2+OFFSET_STRUCT_POINT_Y)
|
|
Successful SSA optimization PassNAddNumberTypeConversions
|
|
Simplifying constant pointer cast (char *) 1024
|
|
Simplifying constant integer cast 0
|
|
Simplifying constant integer cast 1
|
|
Successful SSA optimization PassNCastSimplification
|
|
Finalized unsigned number type (char) 0
|
|
Finalized unsigned number type (char) 1
|
|
Successful SSA optimization PassNFinalizeNumberTypeConversions
|
|
Simplifying expression containing zero (char *)&point2 in [1] SCREEN[0] = *((char *)&point2+OFFSET_STRUCT_POINT_X)
|
|
Simplifying expression containing zero SCREEN in [1] SCREEN[0] = *((char *)&point2)
|
|
Successful SSA optimization PassNSimplifyExpressionWithZero
|
|
Eliminating unused constant OFFSET_STRUCT_POINT_X
|
|
Successful SSA optimization PassNEliminateUnusedVars
|
|
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
|
|
Consolidated array index constant in *(SCREEN+1)
|
|
Successful SSA optimization Pass2ConstantAdditionElimination
|
|
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] *main::p2 = memcpy(*(&point1), struct Point, SIZEOF_STRUCT_POINT)
|
|
[1] *SCREEN = *((char *)&point2)
|
|
[2] *(SCREEN+1) = *((char *)&point2+OFFSET_STRUCT_POINT_Y)
|
|
to:main::@return
|
|
main::@return: scope:[main] from main
|
|
[3] return
|
|
to:@return
|
|
|
|
|
|
VARIABLE REGISTER WEIGHTS
|
|
void main()
|
|
__loadstore struct Point point1 = { x: 2, y: 3 }
|
|
__loadstore volatile struct Point point2 = {}
|
|
|
|
Initial phi equivalence classes
|
|
Added variable point1 to live range equivalence class [ point1 ]
|
|
Added variable point2 to live range equivalence class [ point2 ]
|
|
Complete equivalence classes
|
|
[ point1 ]
|
|
[ point2 ]
|
|
Allocated mem[2] [ point1 ]
|
|
Allocated mem[2] [ point2 ]
|
|
REGISTER UPLIFT POTENTIAL REGISTERS
|
|
Statement [0] *main::p2 = memcpy(*(&point1), struct Point, SIZEOF_STRUCT_POINT) [ point2 ] ( [ point2 ] { } ) always clobbers reg byte a reg byte y
|
|
Statement [1] *SCREEN = *((char *)&point2) [ point2 ] ( [ point2 ] { } ) always clobbers reg byte a
|
|
Statement [2] *(SCREEN+1) = *((char *)&point2+OFFSET_STRUCT_POINT_Y) [ ] ( [ ] { } ) always clobbers reg byte a
|
|
Potential registers mem[2] [ point1 ] : mem[2] ,
|
|
Potential registers mem[2] [ point2 ] : mem[2] ,
|
|
|
|
REGISTER UPLIFT SCOPES
|
|
Uplift Scope [Point]
|
|
Uplift Scope [main]
|
|
Uplift Scope [] 0: mem[2] [ point1 ] 0: mem[2] [ point2 ]
|
|
|
|
Uplifting [Point] best 41 combination
|
|
Uplifting [main] best 41 combination
|
|
Uplifting [] best 41 combination mem[2] [ point1 ] mem[2] [ point2 ]
|
|
|
|
ASSEMBLER BEFORE OPTIMIZATION
|
|
// File Comments
|
|
// Minimal struct with C-Standard behavior - copy assignment through struct pointer
|
|
// Upstart
|
|
// Commodore 64 PRG executable file
|
|
.file [name="struct-35.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
|
|
.const SIZEOF_STRUCT_POINT = 2
|
|
.const OFFSET_STRUCT_POINT_Y = 1
|
|
.label SCREEN = $400
|
|
.segment Code
|
|
// main
|
|
main: {
|
|
.label p2 = point2
|
|
// [0] *main::p2 = memcpy(*(&point1), struct Point, SIZEOF_STRUCT_POINT) -- _deref_pssc1=_deref_pssc2_memcpy_vbuc3
|
|
ldy #SIZEOF_STRUCT_POINT
|
|
!:
|
|
lda point1-1,y
|
|
sta p2-1,y
|
|
dey
|
|
bne !-
|
|
// [1] *SCREEN = *((char *)&point2) -- _deref_pbuc1=_deref_pbuc2
|
|
lda point2
|
|
sta SCREEN
|
|
// [2] *(SCREEN+1) = *((char *)&point2+OFFSET_STRUCT_POINT_Y) -- _deref_pbuc1=_deref_pbuc2
|
|
lda point2+OFFSET_STRUCT_POINT_Y
|
|
sta SCREEN+1
|
|
jmp __breturn
|
|
// main::@return
|
|
__breturn:
|
|
// [3] return
|
|
rts
|
|
}
|
|
// File Data
|
|
.segment Data
|
|
point1: .byte 2, 3
|
|
point2: .fill SIZEOF_STRUCT_POINT, 0
|
|
|
|
ASSEMBLER OPTIMIZATIONS
|
|
Removing instruction jmp __breturn
|
|
Succesful ASM optimization Pass5NextJumpElimination
|
|
Removing instruction __breturn:
|
|
Succesful ASM optimization Pass5UnusedLabelElimination
|
|
|
|
FINAL SYMBOL TABLE
|
|
__constant char OFFSET_STRUCT_POINT_Y = 1
|
|
__constant char * const SCREEN = (char *) 1024
|
|
__constant char SIZEOF_STRUCT_POINT = 2
|
|
void main()
|
|
__constant struct Point *main::p2 = &point2
|
|
__loadstore struct Point point1 = { x: 2, y: 3 } // mem[2]
|
|
__loadstore volatile struct Point point2 = {} // mem[2]
|
|
|
|
mem[2] [ point1 ]
|
|
mem[2] [ point2 ]
|
|
|
|
|
|
FINAL ASSEMBLER
|
|
Score: 38
|
|
|
|
// File Comments
|
|
// Minimal struct with C-Standard behavior - copy assignment through struct pointer
|
|
// Upstart
|
|
// Commodore 64 PRG executable file
|
|
.file [name="struct-35.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
|
|
.const SIZEOF_STRUCT_POINT = 2
|
|
.const OFFSET_STRUCT_POINT_Y = 1
|
|
.label SCREEN = $400
|
|
.segment Code
|
|
// main
|
|
main: {
|
|
.label p2 = point2
|
|
// *p2 = point1
|
|
// [0] *main::p2 = memcpy(*(&point1), struct Point, SIZEOF_STRUCT_POINT) -- _deref_pssc1=_deref_pssc2_memcpy_vbuc3
|
|
ldy #SIZEOF_STRUCT_POINT
|
|
!:
|
|
lda point1-1,y
|
|
sta p2-1,y
|
|
dey
|
|
bne !-
|
|
// SCREEN[0] = point2.x
|
|
// [1] *SCREEN = *((char *)&point2) -- _deref_pbuc1=_deref_pbuc2
|
|
lda point2
|
|
sta SCREEN
|
|
// SCREEN[1] = point2.y
|
|
// [2] *(SCREEN+1) = *((char *)&point2+OFFSET_STRUCT_POINT_Y) -- _deref_pbuc1=_deref_pbuc2
|
|
lda point2+OFFSET_STRUCT_POINT_Y
|
|
sta SCREEN+1
|
|
// main::@return
|
|
// }
|
|
// [3] return
|
|
rts
|
|
}
|
|
// File Data
|
|
.segment Data
|
|
point1: .byte 2, 3
|
|
point2: .fill SIZEOF_STRUCT_POINT, 0
|
|
|