On 02-Dec-14 12:23 PM, Richard Biener wrote:
On Tue, Dec 2, 2014 at 12:11 AM, shmeel gutl
wrote:
While testing my implementation of passing arguments in registers, I noticed
that gcc 4.7 creates instruction dependencies when it doesn't have to.
Consider:
int foo(int a1, int a2, int a3, int a4)
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[Apologies if I'm talking rubbish, or spamming folk with the obvious]
Such an optimisation would ideally be dependent on some estimate on
the register pressure for the relevant register class[es], and perhaps
on some heuristic estimate of the relative
It works fine for my test case.
Thanks
Richard Biener wrote:
>On Tue, Dec 2, 2014 at 12:11 AM, shmeel gutl
> wrote:
>> While testing my implementation of passing arguments in registers, I noticed
>> that gcc 4.7 creates instruction dependencies when it doesn't have to.
>> Consider:
>>
>> int foo
On Tue, Dec 2, 2014 at 12:11 AM, shmeel gutl
wrote:
> While testing my implementation of passing arguments in registers, I noticed
> that gcc 4.7 creates instruction dependencies when it doesn't have to.
> Consider:
>
> int foo(int a1, int a2, int a3, int a4)
> {
> return a1|a2|a3|a4;
> }
>
>
