C code x86 asm MIPS asm x86 asm -O1 MIPS asm -O1 x86 asm -O4 MIPS asm -O4
int main(){}

int sum(int count) 
{     int s = 0;
     int i;
     for(i = 0; i < count; i++) {
	  s+= i;
     }
     return s;
}
	.file	"simpleLoop.c"
	.text
.globl main
	.type	main, @function
main:
	leal	4(%esp), %ecx
	andl	$-16, %esp
	pushl	-4(%ecx)
	pushl	%ebp
	movl	%esp, %ebp
	pushl	%ecx
	popl	%ecx
	popl	%ebp
	leal	-4(%ecx), %esp
	ret
	.size	main, .-main
.globl sum
	.type	sum, @function
sum:
	pushl	%ebp
	movl	%esp, %ebp
	subl	$16, %esp
	movl	$0, -8(%ebp)
	movl	$0, -4(%ebp)
	jmp	.L4
.L5:
	movl	-4(%ebp), %eax
	addl	%eax, -8(%ebp)
	addl	$1, -4(%ebp)
.L4:
	movl	-4(%ebp), %eax
	cmpl	8(%ebp), %eax
	jl	.L5
	movl	-8(%ebp), %eax
	leave
	ret
	.size	sum, .-sum
	.ident	"GCC: (GNU) 4.1.2 20080704 ...
	.section	.note.GNU-stack,"",@progb...
	.file	1 "simpleLoop.c"
	.section .mdebug.abi32
	.previous
	.abicalls
	.text
	.align	2
	.globl	main
	.ent	main
	.type	main, @function
main:
	.frame	$fp,8,$31		# vars= 0, regs=...
	.mask	0x40000000,-8
	.fmask	0x00000000,0
	.set	noreorder
	.cpload	$25
	.set	reorder
	addiu	$sp,$sp,-8
	sw	$fp,0($sp)
	move	$fp,$sp
	move	$sp,$fp
	lw	$fp,0($sp)
	addiu	$sp,$sp,8
	j	$31
	.end	main
	.align	2
	.globl	sum
	.ent	sum
	.type	sum, @function
sum:
	.frame	$fp,24,$31		# vars= 8, regs...
	.mask	0x40000000,-8
	.fmask	0x00000000,0
	.set	noreorder
	.cpload	$25
	.set	reorder
	addiu	$sp,$sp,-24
	sw	$fp,16($sp)
	move	$fp,$sp
	sw	$4,24($fp)
	sw	$0,8($fp)
	sw	$0,12($fp)
$L3:
	lw	$2,12($fp)
	lw	$3,24($fp)
	slt	$2,$2,$3
	beq	$2,$0,$L4
	lw	$3,8($fp)
	lw	$2,12($fp)
	addu	$2,$3,$2
	sw	$2,8($fp)
	lw	$2,12($fp)
	addiu	$2,$2,1
	sw	$2,12($fp)
	b	$L3
$L4:
	lw	$2,8($fp)
	move	$sp,$fp
	lw	$fp,16($sp)
	addiu	$sp,$sp,24
	j	$31
	.end	sum
	.ident	"GCC: (GNU) 3.4.5"
	.file	"simpleLoop.c"
	.text
.globl main
	.type	main, @function
main:
	leal	4(%esp), %ecx
	andl	$-16, %esp
	pushl	-4(%ecx)
	pushl	%ebp
	movl	%esp, %ebp
	pushl	%ecx
	popl	%ecx
	popl	%ebp
	leal	-4(%ecx), %esp
	ret
	.size	main, .-main
.globl sum
	.type	sum, @function
sum:
	pushl	%ebp
	movl	%esp, %ebp
	movl	8(%ebp), %ecx
	movl	$0, %eax
	testl	%ecx, %ecx
	jle	.L6
	movl	$0, %eax
	movl	$0, %edx
.L7:
	addl	%edx, %eax
	addl	$1, %edx
	cmpl	%ecx, %edx
	jne	.L7
.L6:
	popl	%ebp
	ret
	.size	sum, .-sum
	.ident	"GCC: (GNU) 4.1.2 20080704 ...
	.section	.note.GNU-stack,"",@progb...
	.file	1 "simpleLoop.c"
	.section .mdebug.abi32
	.previous
	.abicalls
	.text
	.align	2
	.globl	main
	.ent	main
	.type	main, @function
main:
	.frame	$sp,0,$31		# vars= 0, regs=...
	.mask	0x00000000,0
	.fmask	0x00000000,0
	.set	noreorder
	.cpload	$25
	.set	reorder
	j	$31
	.end	main
	.align	2
	.globl	sum
	.ent	sum
	.type	sum, @function
sum:
	.frame	$sp,0,$31		# vars= 0, regs=...
	.mask	0x00000000,0
	.fmask	0x00000000,0
	.set	noreorder
	.cpload	$25
	.set	reorder
	move	$3,$0
	.set	noreorder
	.set	nomacro
	blez	$4,$L8
	move	$5,$0
	.set	macro
	.set	reorder

$L6:
	addu	$5,$5,$3
	addiu	$3,$3,1
	slt	$2,$3,$4
	bne	$2,$0,$L6
$L8:
	.set	noreorder
	.set	nomacro
	j	$31
	move	$2,$5
	.set	macro
	.set	reorder

	.end	sum
	.ident	"GCC: (GNU) 3.4.5"
	.file	"simpleLoop.c"
	.text
	.p2align 4,,15
.globl main
	.type	main, @function
main:
	leal	4(%esp), %ecx
	andl	$-16, %esp
	pushl	-4(%ecx)
	pushl	%ebp
	movl	%esp, %ebp
	pushl	%ecx
	popl	%ecx
	popl	%ebp
	leal	-4(%ecx), %esp
	ret
	.size	main, .-main
	.p2align 4,,15
.globl sum
	.type	sum, @function
sum:
	pushl	%ebp
	xorl	%eax, %eax
	movl	%esp, %ebp
	movl	8(%ebp), %ecx
	testl	%ecx, %ecx
	jle	.L6
	xorl	%edx, %edx
	.p2align 4,,7
.L7:
	addl	%edx, %eax
	addl	$1, %edx
	cmpl	%ecx, %edx
	jne	.L7
.L6:
	popl	%ebp
	ret
	.size	sum, .-sum
	.ident	"GCC: (GNU) 4.1.2 20080704 ...
	.section	.note.GNU-stack,"",@progb...
	.file	1 "simpleLoop.c"
	.section .mdebug.abi32
	.previous
	.abicalls
	.text
	.align	2
	.globl	main
	.ent	main
	.type	main, @function
main:
	.frame	$sp,0,$31		# vars= 0, regs=...
	.mask	0x00000000,0
	.fmask	0x00000000,0
	.set	noreorder
	.set	nomacro
	
	j	$31
	nop

	.set	macro
	.set	reorder
	.end	main
	.align	2
	.globl	sum
	.ent	sum
	.type	sum, @function
sum:
	.frame	$sp,0,$31		# vars= 0, regs=...
	.mask	0x00000000,0
	.fmask	0x00000000,0
	.set	noreorder
	.set	nomacro
	
	move	$5,$0
	blez	$4,$L8
	move	$3,$0

$L9:
	addu	$5,$5,$3
	addiu	$3,$3,1
	slt	$2,$3,$4
	bne	$2,$0,$L9
	nop

$L8:
	j	$31
	move	$2,$5

	.set	macro
	.set	reorder
	.end	sum
	.ident	"GCC: (GNU) 3.4.5"