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...ctly before a spill is inserted in InlineSpiller.cpp using MBFI.getBlockFreq() and LiveIntervals::getSpillWeight. My question is why are these functions sometimes indicating that the frequency of a block, or the weight of a spill is 0? A frequency of 0 doesn't make sense to me. Thanks, Austin Kerbow

...san Shobaki Assistant Professor of Computer Science California State University, Sacramento ________________________________ From: qcolombet at apple.com <qcolombet at apple.com> on behalf of Quentin Colombet <qcolombet at apple.com> Sent: Wednesday, September 20, 2017 9:44:35 AM To: Kerbow, Austin Michael Cc: via llvm-dev Subject: Re: [llvm-dev] Spill Weight In InlineSpiller Hi Austin, > On Sep 19, 2017, at 11:29 PM, Kerbow, Austin Michael via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > I'm trying to compute and print a weighted spill cost based upon the exe...

...from ScheduleDAGMILive look like they are accounting for AH and AL being live because the corresponding pressure sets for these register classes are increased. In the mischeduler is there a way to discover that these two registers may be contributing to peak pressure in the block? Thanks, Austin Kerbow -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20170812/9cf0103b/attachment.html> -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: rp_testcase.tx...

> On Aug 30, 2017, at 1:43 PM, Matthias Braun <matze at braunis.de> wrote: > > That means you cannot use the code from RegisterPressure.{cpp|h} to compute this. The other liveness analysis we have in llvm codegen is LiveIntervals (LiveItnervalAnalysis) which gives you a list of liveness segments of a given vreg (the same representation is used in most linear scan allocators even

...ssistant Professor of Computer Science California State University, Sacramento ________________________________ From: Jonas Paulsson <paulsson at linux.vnet.ibm.com> Sent: Monday, September 11, 2017 3:15:29 AM To: Andrew Trick; Matthias Braun Cc: Shobaki, Ghassan; llvm-dev at lists.llvm.org; Kerbow, Austin Michael; ghassanshobaki at gmail.com Subject: Re: Register pressure calculation in the machine scheduler and live-through registers On 2017-08-30 23:14, Andrew Trick wrote: On Aug 30, 2017, at 1:43 PM, Matthias Braun <matze at braunis.de<mailto:matze at braunis.de>> wrote:...