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...GDB) backtrace. (Please note that my RemoveBranch code is nothing special, it looks exactly the same as the code in the Mips backend. ) llc: /work/llvm/trunk/llvm/lib/CodeGen/MachineRegisterInfo.cpp:162: void llvm::MachineRegisterInfo::removeRegOperandFromUseList(llvm::MachineOperand*): Assertion `NextOp->getReg() == MO->getReg() && "Corrupt reg use/def chain!"' failed. Program received signal SIGABRT, Aborted. 0xb7fdd424 in __kernel_vsyscall () (gdb) bt #0 0xb7fdd424 in __kernel_vsyscall () #1 0xb7cfe1ef in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise....

Hi, What kind of C/C++ high level code can generate a computed jump, such as: jmpq *%r14 or jmpq *(%r14,%rbx,8) ? I imagine that any calls (including virtual) would use something like 'call *%r14', and the above jumps are mostly from 'switch' statements. Is this correct? Anything else? Thank you, Dan

...e machineInstrs, but couldn’t find similar utility for MachineBasicBlock. So, I created a utility myself for cloning a MachineBasicBlock, but I am running into an issue when LLVM is trying to  destroy the use list for registers (RemoveRegOperandsFromUseLists--> RemoveRegOperandFromRegInfo()-->NextOp->getReg() – where nextOp seems like invalid but not NULL). Its hitting assert in one of the registers that is getting reused in the cloned block What I am trying to do is to use exact set of virtual registers in both the blocks. Will it cause any issues?   Here is the snippet of what the code d...

On 08/01/2018 06:10 AM, Richard W.M. Jones wrote: > This can truncate, extend, or round up/down to a multiple. > --- > common-rules.mk | 3 +- > configure.ac | 1 + > filters/offset/nbdkit-offset-filter.pod | 7 +- > filters/partition/nbdkit-partition-filter.pod | 1 + >

...read from cache as usual. Unfortunately this could slow down all pread requests, since there's no easy way in a filter to return early with the requested data. Background threads? We've avoided this in filters so far. One problem is that they don't have access to the handle or "nextops" structure. (2) Add a new readahead filter which extents all pread requests (unconditionally) but throws away the prefetched data. You would need to use this in conjunction with a cache filter or other caching layer. As Eric points out there is no way to enforce correct layering here, we...