similar to: [LLVMdev] -Os

On 02/23/2013 04:28 AM, David Chisnall wrote: > Hi Reed, > > -Os could do with some love. It is more or less the same set of passes as -O2, but with a few things that are most likely to increase code size removed. We have had problems with it in the past for FreeBSD's bootloader. By tweaking the set of default passes added for -Os, I got the size down by about 20%, but I didn't

At one of the BOFS during the llvm conference a few years back, one of the Apple managers stated in effect that their view of -Os was to get some modest savings but only if performance has near 0 impact. On 02/23/2013 09:45 AM, Reed Kotler wrote: > On 02/23/2013 04:28 AM, David Chisnall wrote: >> Hi Reed, >> >> -Os could do with some love. It is more or less the same set

Hi Reed, -Os could do with some love. It is more or less the same set of passes as -O2, but with a few things that are most likely to increase code size removed. We have had problems with it in the past for FreeBSD's bootloader. By tweaking the set of default passes added for -Os, I got the size down by about 20%, but I didn't have time to evaluate whether this was a general saving or

Just realized that BasicTransformInfoClass is an immutable pass. Not sure how to reconcile this with fact that there will be different answers needed depending on the subtarget. Seems like BasicTansformInfoClass should become a function pass that does not modify anything. On 03/22/2013 09:43 AM, Reed Kotler wrote: > Another way to do this would to be to have a reset virtual function >

On 01/08/2013 01:48 PM, Eli Friedman wrote: > On Mon, Jan 7, 2013 at 6:07 PM, reed kotler <rkotler at mips.com> wrote: >> For example: >> >> /home/rkotler/llvm/install/bin/llc -mcpu=mips16 hf16_2.ll -march=mipsel >> -relocation-model=pic -o hf16_2.s -O3 -mips16-hard-float -soft-float > Try something like the following: > > float f; > double test(void*

Hi Reed, We will need to reconstruct the target machine and the TTI chain when the function attributes change. We currently don't have code for doing that but I suggest that you talk with Bill Wendling about the best way to implement this. Thanks, Nadav On Mar 22, 2013, at 11:30 AM, Reed Kotler <rkotler at mips.com> wrote: > Just realized that BasicTransformInfoClass is an

On 05/14/2012 02:42 PM, Jakob Stoklund Olesen wrote: > On May 14, 2012, at 2:28 PM, reed kotler wrote: > >> I'm not using getMinimalPhysRegClass. Some target independent code is using it. > Probably PEI. > >> It makes trouble for us and I would like to submit a patch to make it a virtual function so that I can override it and make it meaningful for Mips, as long as this

In that case it tries to do something but fails. rkotler at ubuntu-rkotler:~/testmips16$ /home/rkotler/llvmw/install/bin/bugpoint casts.bc -llc-safe --safe-tool-args -target=mips-linux-gnu -mcpu=mips16 -mips16-constant-islands Read input file : 'casts.bc' *** All input ok Initializing execution environment: Found llc: /home/rkotler/llvmw/install/bin/llc Running the code

We already divided out our classes as you did for ARM. The problem here is that we have a store/load byte/halfword to/from a Frame object. We know at that time that it's not going to be possible to store it using SP because there is only such instructions for store/load of a word. What we would want to do is to move SP into a Mips 16 register and then do a indexed load/store off of that

On 05/27/2013 10:48 PM, Evan Cheng wrote: > I don't quite understand your question. Clang already supports -Os option. > > Evan Okay. Do I need to add anything to the llc command line? > Sent from my iPad > > On May 27, 2013, at 7:47 PM, reed kotler <rkotler at mips.com> wrote: > >> I'm trying to set the default optimizations for mips16. >>

On 01/28/2014 06:29 PM, Eric Christopher wrote: > Uhhhh... > > -eric > > On Tue, Jan 28, 2014 at 4:56 PM, reed kotler <rkotler at mips.com> wrote: >> I would like to make the following member of AsmPrinter be protected >> >> >> void EmitInlineAsm(StringRef Str, const MDNode *LocMDNode = 0, >> InlineAsm::AsmDialect

Reed, On May 14, 2012, at 3:45 PM, reed kotler <rkotler at mips.com> wrote: > On 05/14/2012 02:42 PM, Jakob Stoklund Olesen wrote: >> On May 14, 2012, at 2:28 PM, reed kotler wrote: >> >>> I'm not using getMinimalPhysRegClass. Some target independent code is using it. >> Probably PEI. >> >>> It makes trouble for us and I would like to

Ok. That's a somewhat different problem, then. Devil will be in the details of what you want to do. A few options. First is to always have a standard frame pointer register available and reference off of that. Caveat: dynamic stack realignment and vararrays muck with that more than a bit. Second is what gcc is doing and reserve a register just for this in addition to the frame register.

On 01/04/2013 06:08 PM, Eli Friedman wrote: > On Fri, Jan 4, 2013 at 4:08 PM, reed kotler <rkotler at mips.com> wrote: >> I'm working on mips16 hard float which at a first approximation is just soft >> float but calls different library routines. Those different library routines >> are just an implementation (in mips32 mode) of soft float using mips32 >>

Yes, you could have mips16 and fastcc. Mips16 just means that processor mode to execute that function is "mips16". So in a mips16 designated function, I will just emit mips16 instructions and in a "nomips16" function, just emit normal mips32 instructions. I tend to call this "mips32" normal mode, "standard encoding" because in reality the processor is

This is my first time using bugpoint. I'm getting the following error: /home/rkotler/llvmw/install/bin/bugpoint -run-llc casts.bc --tool-args -target mips-linux-gnu -mcpu=mips16 -mips16-constant-islands Read input file : 'casts.bc' *** All input ok Initializing execution environment: Found llc: /home/rkotler/llvmw/install/bin/llc Sorry, I can't automatically select a

On Fri, Jan 4, 2013 at 6:28 PM, reed kotler <rkotler at mips.com> wrote: > On 01/04/2013 06:08 PM, Eli Friedman wrote: >> >> On Fri, Jan 4, 2013 at 4:08 PM, reed kotler <rkotler at mips.com> wrote: >>> >>> I'm working on mips16 hard float which at a first approximation is just >>> soft >>> float but calls different library

On 01/04/2013 07:45 PM, Eli Friedman wrote: > On Fri, Jan 4, 2013 at 6:28 PM, reed kotler <rkotler at mips.com> wrote: >> On 01/04/2013 06:08 PM, Eli Friedman wrote: >>> On Fri, Jan 4, 2013 at 4:08 PM, reed kotler <rkotler at mips.com> wrote: >>>> I'm working on mips16 hard float which at a first approximation is just >>>> soft

----- Original Message ----- > From: "Reed Kotler" <rkotler at mips.com> > To: "Hal Finkel" <hfinkel at anl.gov> > Cc: LLVMdev at cs.uiuc.edu > Sent: Friday, November 22, 2013 11:18:53 PM > Subject: Re: bugpoint question > > In that case it tries to do something but fails. > > rkotler at ubuntu-rkotler:~/testmips16$ >

Actually, SP is already not in the mips 16 register class but there is some C++ code that is common to mips32, mips64 and mips16 that is wanting to use SP. It's kind of awkward but does work except in this case of load/store haflword and byte to stack objects. Maybe I'm shooting myself in the foot there. I don't know that code too well so maybe I need to look into it. There are