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There is PostDominatorTree for determining post-dominance. Even if A post-dominates B and B is executed, that doesn't guarantee that A will be executed. For example, there could be an infinite loop in-between. Strong post-dominance makes the stronger guarantee that there will be no infinite loop from B to A. Do we have anything in LLVM for determining strong post-dominance and in general for

----- Original Message ----- > From: "Bjarke Roune" <broune at google.com> > To: "Hal Finkel" <hfinkel at anl.gov> > Cc: llvmdev at cs.uiuc.edu, "Jingyue Wu" <jingyue at google.com> > Sent: Wednesday, July 1, 2015 2:27:59 PM > Subject: Re: [LLVMdev] Deriving undefined behavior from nsw/inbounds/poison for scal...

...ttps://llvm.org/bugs/show_bug.cgi?id=21148). For this reason, we disabled indvar widening in NVPTX in http://reviews.llvm.org/D6196. Hope it helps. Jingyue On Mon, Jun 29, 2015 at 11:59 AM Adam Nemet <anemet at apple.com> wrote: > > > On Jun 26, 2015, at 4:01 PM, Bjarke Roune <broune at google.com> wrote: > > > > *** Summary > > I'd like to propose (and implement) functionality in LLVM to determine > when a poison value from an instruction is guaranteed to produce undefined > behavior. I want to use that to improve handling of nsw, inbounds etc....

----- Original Message ----- > From: "Bjarke Roune" <broune at google.com> > To: "Jingyue Wu" <jingyue at google.com> > Cc: llvmdev at cs.uiuc.edu > Sent: Tuesday, June 30, 2015 8:16:13 PM > Subject: Re: [LLVMdev] Deriving undefined behavior from nsw/inbounds/poison for scalar evolution > > Hi Adam, > > Jingyue...

..._data(156) copy_trans_params_and_data: params[0..6] data[0..152] [2000/05/11 15:17:58, 5] lib/util.c:show_msg(430) The line: Running the command `/usr/local/bin/lpq -P csulw' gave 0 seems to indicate the trouble but when I run the command it gives the queue as expected. TIA BB -- Bevan Broun ph (08) 9380 1587 Computer Systems Officer fax (08) 9380 1065 Dept. Electrical and Electronic Engineering University of Western Australia rm. G70

...m udp wait root internal discard dgram udp wait root internal chargen dgram udp wait root internal daytime dgram udp wait root internal time dgram udp wait root internal Is there a service here that need to be turned on? BB -- Bevan Broun ph (08) 9380 1587 Computer Systems Officer fax (08) 9380 1065 Dept. Electrical and Electronic Engineering University of Western Australia rm. G70

*** Summary I'd like to propose (and implement) functionality in LLVM to determine when a poison value from an instruction is guaranteed to produce undefined behavior. I want to use that to improve handling of nsw, inbounds etc. flags in scalar evolution and LSR. I imagine that there would be other uses for it. I'd like feedback on this idea before I proceed with it. *** Details Poison

...this is where the file is. Changes to smb.conf are noticed and acted on EXCEPT for the "workgroup = XXX" line. The only way I could get nmbd to use the workgroup name in smb.conf was via -s /usr/local/daemon/samba/lib/smb.conf This has been done but it does look like a bug. BB -- Bevan Broun ph (08) 9380 1587 Computer Systems Officer fax (08) 9380 1065 Dept. Electrical and Electronic Engineering University of Western Australia rm. G70

...so I can see what's going on and it appears correct Rank Pri Owner Job Files Total Size 1st 50 bevanb 1 unavail.ps 2048 bytes The NT (NT4 sp6) machine is running under vmware on the same machine as the cups/samba server. Help! BB -- Bevan Broun ph (08) 9380 1587 Computer Systems Officer fax (08) 9380 1065 Dept. Electrical and Electronic Engineering University of Western Australia rm. G70

...amba server as the user connecting to the print share but the "lprm command" is executing nobody (and therefore failing). I cant understand the problem. The NT server is 4.0 sp6, the clients are all NT workstation 4.0 sp6. It looks like the problem is in samba or NT. HELP BB -- Bevan Broun ph (08) 9380 1587 Computer Systems Officer fax (08) 9380 1065 Dept. Electrical and Electronic Engineering University of Western Australia rm. G70

Hi Sanjoy, thanks for your thoughts on this. On Sat, Jun 27, 2015 at 12:16 AM, Sanjoy Das <sanjoy at playingwithpointers.com > wrote: > > First of all, going by the "poison causes UB only when observed", SCEV > does not do the right thing currently: [...] > > That seems like a bug? There's also bug 23527 for GEP. Sounds like there might be more such bugs. One