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/* Compilation: -
O1
*/
/* Compilation: -
O2
*/
.file "test.c"
.file "test.c"
__SP_L__ = 0x3d
__SP_L__ = 0x3d
__SREG__ = 0x3f
__SREG__ = 0x3f
__tmp_reg__ = 0
__tmp_reg__ = 0
__zero_reg__ = 1
__zero_reg__ = 1
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.text
.section
.text
.startup,"ax",@progbits
.global main
.global main
.type main, @function
.type main, @function
main:
main:
/* prologue: function */
/* prologue: function */
/* frame size = 0 */
/* frame size = 0 */
/* stack size = 0 */
/* stack size = 0 */
.L__stack_usage = 0
.L__stack_usage = 0
ldi r24,lo8(1)
ldi r24,lo8(1)
out 0x17,r24
out 0x17,r24
ldi r24,lo8(10)
ldi r24,lo8(10)
ldi r25,lo8(1)
ldi r25,lo8(1)
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.
L3
:
.
L4
:
out 0x18,r25
out 0x18,r25
ldi r18,lo8(119999)
ldi r18,lo8(119999)
ldi r19,hi8(119999)
ldi r19,hi8(119999)
ldi r20,hlo8(119999)
ldi r20,hlo8(119999)
1: subi r18,1
1: subi r18,1
sbci r19,0
sbci r19,0
sbci r20,0
sbci r20,0
brne 1b
brne 1b
rjmp .
rjmp .
nop
nop
out 0x18,__zero_reg__
out 0x18,__zero_reg__
ldi r18,lo8(119999)
ldi r18,lo8(119999)
ldi r19,hi8(119999)
ldi r19,hi8(119999)
ldi r20,hlo8(119999)
ldi r20,hlo8(119999)
1: subi r18,1
1: subi r18,1
sbci r19,0
sbci r19,0
sbci r20,0
sbci r20,0
brne 1b
brne 1b
rjmp .
rjmp .
nop
nop
subi r24,lo8(-(-1))
subi r24,lo8(-(-1))
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brne .
L3
brne .
L4
.
L4
:
.
L3
:
rjmp .
L4
rjmp .
L3
.size main, .-main
.size main, .-main
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.text
.global test
.global test
.type test, @function
.type test, @function
test:
test:
/* prologue: function */
/* prologue: function */
/* frame size = 0 */
/* frame size = 0 */
/* stack size = 0 */
/* stack size = 0 */
.L__stack_usage = 0
.L__stack_usage = 0
ldi r24,lo8(1)
ldi r24,lo8(1)
out 0x17,r24
out 0x17,r24
ldi r24,lo8(10)
ldi r24,lo8(10)
ldi r25,lo8(1)
ldi r25,lo8(1)
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.
L7
:
.
L8
:
out 0x18,r25
out 0x18,r25
ldi r30,lo8(29999)
ldi r30,lo8(29999)
ldi r31,hi8(29999)
ldi r31,hi8(29999)
1: sbiw r30,1
1: sbiw r30,1
brne 1b
brne 1b
rjmp .
rjmp .
nop
nop
out 0x18,__zero_reg__
out 0x18,__zero_reg__
ldi r30,lo8(29999)
ldi r30,lo8(29999)
ldi r31,hi8(29999)
ldi r31,hi8(29999)
1: sbiw r30,1
1: sbiw r30,1
brne 1b
brne 1b
rjmp .
rjmp .
nop
nop
subi r24,lo8(-(-1))
subi r24,lo8(-(-1))
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brne .
L7
brne .
L8
/* epilogue start */
/* epilogue start */
ret
ret
.size test, .-test
.size test, .-test
.ident "GCC: (GNU) 4.8.2"
.ident "GCC: (GNU) 4.8.2"
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/* Compilation: -O1 */ .file "test.c" __SP_L__ = 0x3d __SREG__ = 0x3f __tmp_reg__ = 0 __zero_reg__ = 1 .text .global main .type main, @function main: /* prologue: function */ /* frame size = 0 */ /* stack size = 0 */ .L__stack_usage = 0 ldi r24,lo8(1) out 0x17,r24 ldi r24,lo8(10) ldi r25,lo8(1) .L3: out 0x18,r25 ldi r18,lo8(119999) ldi r19,hi8(119999) ldi r20,hlo8(119999) 1: subi r18,1 sbci r19,0 sbci r20,0 brne 1b rjmp . nop out 0x18,__zero_reg__ ldi r18,lo8(119999) ldi r19,hi8(119999) ldi r20,hlo8(119999) 1: subi r18,1 sbci r19,0 sbci r20,0 brne 1b rjmp . nop subi r24,lo8(-(-1)) brne .L3 .L4: rjmp .L4 .size main, .-main .global test .type test, @function test: /* prologue: function */ /* frame size = 0 */ /* stack size = 0 */ .L__stack_usage = 0 ldi r24,lo8(1) out 0x17,r24 ldi r24,lo8(10) ldi r25,lo8(1) .L7: out 0x18,r25 ldi r30,lo8(29999) ldi r31,hi8(29999) 1: sbiw r30,1 brne 1b rjmp . nop out 0x18,__zero_reg__ ldi r30,lo8(29999) ldi r31,hi8(29999) 1: sbiw r30,1 brne 1b rjmp . nop subi r24,lo8(-(-1)) brne .L7 /* epilogue start */ ret .size test, .-test .ident "GCC: (GNU) 4.8.2"
更改后文本
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/* Compilation: -O2 */ .file "test.c" __SP_L__ = 0x3d __SREG__ = 0x3f __tmp_reg__ = 0 __zero_reg__ = 1 .section .text.startup,"ax",@progbits .global main .type main, @function main: /* prologue: function */ /* frame size = 0 */ /* stack size = 0 */ .L__stack_usage = 0 ldi r24,lo8(1) out 0x17,r24 ldi r24,lo8(10) ldi r25,lo8(1) .L4: out 0x18,r25 ldi r18,lo8(119999) ldi r19,hi8(119999) ldi r20,hlo8(119999) 1: subi r18,1 sbci r19,0 sbci r20,0 brne 1b rjmp . nop out 0x18,__zero_reg__ ldi r18,lo8(119999) ldi r19,hi8(119999) ldi r20,hlo8(119999) 1: subi r18,1 sbci r19,0 sbci r20,0 brne 1b rjmp . nop subi r24,lo8(-(-1)) brne .L4 .L3: rjmp .L3 .size main, .-main .text .global test .type test, @function test: /* prologue: function */ /* frame size = 0 */ /* stack size = 0 */ .L__stack_usage = 0 ldi r24,lo8(1) out 0x17,r24 ldi r24,lo8(10) ldi r25,lo8(1) .L8: out 0x18,r25 ldi r30,lo8(29999) ldi r31,hi8(29999) 1: sbiw r30,1 brne 1b rjmp . nop out 0x18,__zero_reg__ ldi r30,lo8(29999) ldi r31,hi8(29999) 1: sbiw r30,1 brne 1b rjmp . nop subi r24,lo8(-(-1)) brne .L8 /* epilogue start */ ret .size test, .-test .ident "GCC: (GNU) 4.8.2"
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