Comment # 3
on bug 72785
from Tom Stellard
(In reply to comment #0) > bfgminer --benchmark without scrypt seems to be working fine now. > > But I think many people would rather compute scrypt right now on their 7xxx+ > GPUs, just considering the recent rumors that the radeon 7950 is getting > sold out because of litecoin miners. > > With mesa/llvm it doesn't work yet. > > llvm 3.5 197392, mesa and stuff are very recent git builds. > > The kernel is > https://github.com/luke-jr/bfgminer/blob/bfgminer/scrypt130511.cl > > bfgminer is started with > > bfgminer -v1 --scrypt -S opencl:auto --url="" > --userpass=<user:worker:pass> > > The error is: > > Initialising kernel scrypt130511.cl without bitalign, 1 vectors and worksize > 256 > > [...] > > LLVM ERROR: Cannot select: 0x7f0b7cbd40a0: ch = br_cc 0x7f0b7cd32bb0, > 0x7f0b7cc28c20, 0x7f0b7cd32fb0, 0x7f0b7cc2bc30, 0x7f0b7cc2ad30 [ORD=19251] > [ID=4253] > 0x7f0b7cd32fb0: i1,ch = llvm.SI.loop 0x7f0b7cc2c030:1, 0x7f0b7cd333b0, > 0x7f0b7cc2c030 [ORD=19250] [ID=4250] > 0x7f0b7cd333b0: i64 = TargetConstant<3431> [ID=132] > 0x7f0b7cc2c030: i64,ch = llvm.SI.if.break 0x7f0b7cf2f3e0, > 0x7f0b7cc2b530, 0x7f0b7cc2c530, 0x7f0b7cd339b0 [ORD=19249] [ID=4249] > 0x7f0b7cc2b530: i64 = TargetConstant<3428> [ID=129] > 0x7f0b7cc2c530: i1 = setcc 0x7f0b7cc7dd60, 0x7f0b7cc80760, > 0x7f0b7cd337b0 [ORD=19248] [ID=212] > 0x7f0b7cc7dd60: i64 = add 0x7f0b7cc81560, 0x7f0b7cc81360 [ORD=13153] > [ID=187] > 0x7f0b7cc81560: i64,ch = CopyFromReg 0x7f0b7c0535d8, > 0x7f0b7cc81660 [ORD=13147] [ID=149] > 0x7f0b7cc81660: i64 = Register %vreg53 [ID=1] > 0x7f0b7cc81360: i64 = Constant<1> [ID=2] > 0x7f0b7cc80760: i64 = Constant<4> [ID=4] > 0x7f0b7cd339b0: i64,ch = CopyFromReg 0x7f0b7c0535d8, 0x7f0b7cd342b0 > [ORD=19249] [ID=185] > 0x7f0b7cd342b0: i64 = Register %vreg52 [ID=130] > 0x7f0b7cc2bc30: i1 = Constant<-1> [ID=133] > In function: search This patch: http://cgit.freedesktop.org/~tstellar/llvm/commit/?h=master-testing-si&id=41d1f890bc2095a1354c4502cc97e30b3288ba1a should fix the crash in an unmodified kernel. However, you will probably still see the error from comment 3. I need a test case in order to commit this patch. Could you post the output of R600_DEBUG=cs from an unmodified kernel *without* this patch applied.
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