[Bug 72785] New: bfgminer --scrypt on 7xxx+

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Priority medium
Bug ID 72785
Assignee dri-devel@lists.freedesktop.org
Summary bfgminer --scrypt on 7xxx+
Severity normal
Classification Unclassified
OS All
Reporter haagch.christoph@googlemail.com
Hardware All
Status NEW
Version git
Component Drivers/Gallium/radeonsi
Product Mesa

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]
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