[Pkg-opencl-devel] Bug#974797: pocl: Please upgrade to llvm-toolchain-11

[Andreas Beckmann]

On 11/19/20 3:39 PM, Andreas Beckmann wrote:
> POCL built against LLVM 10 (sid) or LLVM 11 (experimental) causes a 
> autopkgtest regression on armhf in libgpuarray while it succeeded with 
> LLVM 9.

I finally managed to create a plain c reproducer (based on some pocl
test) which dies with this backtrace on abel.d.o:

#0  getEmissionKind () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/include/llvm/IR/DebugInfoMetadata.h:1244
#1  initialize () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/CodeGen/LexicalScopes.cpp:53
#2  0xb13a82f0 in computeIntervals () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/CodeGen/LiveDebugVariables.cpp:979
#3  runOnMachineFunction () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/CodeGen/LiveDebugVariables.cpp:996
#4  runOnMachineFunction () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/CodeGen/LiveDebugVariables.cpp:1023
#5  0xb141d6c8 in runOnFunction () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/CodeGen/MachineFunctionPass.cpp:73
#6  0xb1297494 in runOnFunction () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/IR/LegacyPassManager.cpp:1481
#7  0xb1297750 in runOnModule () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/IR/LegacyPassManager.cpp:1517
#8  0xb1297ba8 in runOnModule () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/IR/LegacyPassManager.cpp:1582
#9  run () at /build/llvm-toolchain-10-hVI0Qp/llvm-toolchain-10-10.0.1/llvm/lib/IR/LegacyPassManager.cpp:1694
#10 0xb6dfac82 in pocl_llvm_codegen (Device=Device at entry=0x1a3dfc8, Modp=0x20102d8, Output=Output at entry=0xbe9be8bc, OutputSize=OutputSize at entry=0xbe9be8d0) at ./lib/CL/pocl_llvm_wg.cc:624
#11 0xb6dbf1de in llvm_codegen (output=output at entry=0x1be75e0 "/home/anbe/.cache/pocl/kcache/AP/PNFEAPBKBFEAKGGNMALGHGJEEKGMJFBFBMDHA/Sdot_kernel/0-0-0/Sdot_kernel.so", device_i=device_i at entry=0, kernel=kernel at entry=0xbe9c0290, device=0x1a3dfc8, 
    command=command at entry=0xbe9c02c8, specialize=specialize at entry=0) at ./lib/CL/devices/common.c:158
#12 0xb6dc0e44 in pocl_check_kernel_disk_cache (command=command at entry=0xbe9c02c8, specialized=specialized at entry=0) at ./lib/CL/devices/common.c:958
#13 0xb6dc1262 in pocl_check_kernel_dlhandle_cache (command=0xbe9c02c8, initial_refcount=0, specialize=0) at ./lib/CL/devices/common.c:1081
#14 0xb6d993d4 in program_compile_dynamic_wg_binaries (program=program at entry=0x1a18350) at ./lib/CL/pocl_build.c:179
#15 0xb6da9f20 in get_binary_sizes (sizes=0xbe9c03d4, program=0x1a18350) at ./lib/CL/clGetProgramInfo.c:36
#16 POclGetProgramInfo (program=0x1a18350, param_name=4453, param_value_size=128, param_value=0xbe9c03d4, param_value_size_ret=0xbe9c03d0) at ./lib/CL/clGetProgramInfo.c:115
#17 0x0045a070 in main () at 975931.c:238

I expect pocl built against llvm 11 (experimental) to fail similarily.
pocl built against llvm 9 (testing) passes.

Sylvestre, could you check whether this is an error on the LLVM side
or is POCL using LLVM incorrectly?


Andreas
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 975931.c
Type: text/x-csrc
Size: 9414 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-opencl-devel/attachments/20201202/39d2d37c/attachment.c>