Re: Scheduler:LLVM vs gcc, which is better

2014-03-12 Thread Renato Golin
On 12 March 2014 15:13, lin zuojian wrote: > Hi Chandler, > I have looked into their "Machine Instr Scheduler", and find out > that LLVM have not yet enable them by default.And further test find > they are still not yet working.(e.g,-mtune=cortex-a9,a15,a53 > generates the same cod

Re: Scheduler:LLVM vs gcc, which is better

2014-03-12 Thread lin zuojian
On Tue, Mar 11, 2014 at 11:30:28AM +0800, lin zuojian wrote: > Hi Chandler, > Thanks a lot for your answer.It is pretty misleading to find out > that DAG has schedule unit. > -- > Regards > lin zuojian Hi Chandler, I have looked into their "Machine Instr Scheduler", and find out th

Re: Scheduler:LLVM vs gcc, which is better

2014-03-10 Thread lin zuojian
Hi Chandler, Thanks a lot for your answer.It is pretty misleading to find out that DAG has schedule unit. -- Regards lin zuojian

Re: Scheduler:LLVM vs gcc, which is better

2014-03-10 Thread Chandler Carruth
On Mon, Mar 10, 2014 at 7:33 PM, lin zuojian wrote: > Hi, > I just ask for opinions.I think many GCC developers do familiar with > the opponent.If I ask in the LLVM mailing list, I have to worry > about If they are familiar with GCC, too(what's sched2 pass?). I suspect you will have t

Re: Scheduler:LLVM vs gcc, which is better

2014-03-10 Thread lin zuojian
On Mon, Mar 10, 2014 at 07:11:43PM -0700, Chandler Carruth wrote: > On Mon, Mar 10, 2014 at 6:59 PM, lin zuojian wrote: > > > > Hi, > > I read LLVM code for a while,and a question raise:Whose scheduler is > > better? > > LLVM brings in the DAG,and make it look important just like IR or

Re: Scheduler:LLVM vs gcc, which is better

2014-03-10 Thread Chandler Carruth
On Mon, Mar 10, 2014 at 6:59 PM, lin zuojian wrote: > > Hi, > I read LLVM code for a while,and a question raise:Whose scheduler is > better? > LLVM brings in the DAG,and make it look important just like IR or > MachineInst.But is that necessary?I don't see what kind of problem >