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There's an assert at line 192, lib/CodeGen/RegisterScavenging.cpp that appears to get tripped on targets that don't have subregisters defined: bool SubUsed = false; for (const unsigned *SubRegs = TRI->getSubRegisters(Reg); unsigned SubReg = *SubRegs; ++SubRegs) if (isUsed(SubReg)) { SubUsed = true; break; } assert(SubUsed && "Using an undefined register!");...

...ed in. Need to RTFC better. On Thu, Feb 25, 2010 at 6:18 PM, Scott Michel <scooter.phd at gmail.com> wrote: > There's an assert at line 192, lib/CodeGen/RegisterScavenging.cpp that > appears to get tripped on targets that don't have subregisters defined: > > bool SubUsed = false; > for (const unsigned *SubRegs = TRI->getSubRegisters(Reg); > unsigned SubReg = *SubRegs; ++SubRegs) > if (isUsed(SubReg)) { > SubUsed = true; > break; > } > assert(SubUsed && "Us...

No, I wasn't having a management lobotomy moment. If the target's registers have no subregisters, SubUsed is false and the assert gets tripped. Ok, back to the original question: What was the original intent in this code (lines 186-193 in lib/CodeGen/RegisterScavenging.cpp)? -scooter On Thu, Feb 25, 2010 at 7:00 PM, Scott Michel <scooter.phd at gmail.com> wrote: > Ugh. Management lobotom...

...hics",]                                         trans <- year.service[year.service$service=="transport",]               fam <- year.service[year.service$service=="family",]               hous <- year.service[year.service$service=="housing",]               subuse <- year.service[year.service$service=="subuse",]               med <- year.service[year.service$service=="genhealth",]               menhlth <- year.service[year.service$service=="mental health",]                                       text(mean(range(service$u...

Scott Michel skrev: > No, I wasn't having a management lobotomy moment. If the target's registers have > no subregisters, SubUsed is false and the assert gets tripped. > > Ok, back to the original question: What was the original intent in this code > (lines 186-193 in lib/CodeGen/RegisterScavenging.cpp)? You beat me to it :). A simple bypass (patch attached) does at least not break 'make check' with x86...

...any bugs you find. > Tried it, and it seems to break quite a big chunk of our tests on SPU :) Before r103488 ("Mostly rewrite RegAllocFast") there was no problem. But with r103488, I get a: llvm/lib/CodeGen/RegisterScavenging.cpp:196: void llvm::RegScavenger::forward(): Assertion `SubUsed && "Using an undefined register!"' failed. In r103685 ("More asserts around physreg uses") the error changed to: llvm/lib/CodeGen/RegAllocFast.cpp:629: void<unnamed>::RAFast::AllocateBasicBlock(llvm::MachineBasicBlock&): Assertion `PhysRegState[Reg] <=...

I just changed the default register allocator for -O0 builds to the fast allocator. This means that the local register allocator is not used anymore, and since it does more or less the same as the fast allocator, there is no reason to keep it around. I am going to delete it in a week or two. If you are using the local register allocator, please try switching to the fast allocator and report any

...r friend. 'make test' is our friend. :-) -scooter On Thu, Feb 25, 2010 at 11:25 PM, <Kalle.Raiskila at nokia.com> wrote: > > Scott Michel skrev: > > No, I wasn't having a management lobotomy moment. If the target's > registers have > > no subregisters, SubUsed is false and the assert gets tripped. > > > > Ok, back to the original question: What was the original intent in this > code > > (lines 186-193 in lib/CodeGen/RegisterScavenging.cpp)? > > You beat me to it :). A simple bypass (patch attached) does at least not > break...

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