On Fri, 2015-12-04 at 16:22 +0800, Bin.Cheng wrote:
> Dump before IVO is as below:
>
> :
> # s1_1 = PHI
> # s2_2 = PHI
> s1_6 = s1_1 + 1;
> c1_8 = *s1_1;
> s2_9 = s2_2 + 1;
> c2_10 = *s2_2;
> if (c1_8 == 0)
> goto ;
> else
> goto ;
>
> And the iv candidates are as:
>
On Fri, Dec 4, 2015 at 11:00 AM, Bin.Cheng wrote:
> On Fri, Dec 4, 2015 at 10:48 AM, Bin.Cheng wrote:
>> On Wed, Dec 2, 2015 at 5:11 AM, Steve Ellcey wrote:
>>>
>>> I have a question involving ivopts and PR 48814, which was a fix for
>>> the post increment operation. Prior to the fix for PR 488
On Fri, Dec 4, 2015 at 10:48 AM, Bin.Cheng wrote:
> On Wed, Dec 2, 2015 at 5:11 AM, Steve Ellcey wrote:
>>
>> I have a question involving ivopts and PR 48814, which was a fix for
>> the post increment operation. Prior to the fix for PR 48814, MIPS
>> would generate this loop for strcmp (C code f
On Wed, Dec 2, 2015 at 5:11 AM, Steve Ellcey wrote:
>
> I have a question involving ivopts and PR 48814, which was a fix for
> the post increment operation. Prior to the fix for PR 48814, MIPS
> would generate this loop for strcmp (C code from glibc):
>
> $L4:
> lbu $3,0($4)
>
On 12/01/2015 02:11 PM, Steve Ellcey wrote:
With the current top-of-tree we now generate:
addiu $4,$4,1
$L8:
lbu $3,-1($4)
addiu $5,$5,1
beq $3,$0,$L7
lbu $2,-1($5) # This is a branch delay slot
beq $3,$2,$L8
addiu
I have a question involving ivopts and PR 48814, which was a fix for
the post increment operation. Prior to the fix for PR 48814, MIPS
would generate this loop for strcmp (C code from glibc):
$L4:
lbu $3,0($4)
lbu $2,0($5)
addiu $4,$4,1
beq $3,$0,$L7
