[SYCL] ICE'd CPU JIT with combination of vector math functions #788
Description
q.submit([&](handler &cgh) {
auto wb = ob.get_access<access::mode::write>(cgh);
cgh.single_task<codegen_or_jit_bug>([=]() {
wb[0] = cl::sycl::fmax(
cl::sycl::dot(
cl::sycl::normalize(float3{0,0,0}),
float3{0,0,0}), 0.f);
});
});
I found this CPU JIT ICE while I was trying to isolate another JIT problem I've got with a larger kernel (kills the compilers VPlan pass so also related to vectorization it seems), this one gives me a nice error log though:
**Internal compiler error** Cannot select: 0x36a2858: v4f32 = extract_subvector 0x3698b68, Constant:i64<0>
0x3698b68: f32 = extract_vector_elt 0x36a2580, Constant:i64<0>
0x36a2580: v4f32 = X86ISD::MOVSHDUP 0x36a2ac8
0x36a2ac8: v4f32 = X86ISD::VFPROUND 0x3698828
0x3698828: v4f64 = X86ISD::VBROADCAST 0x3698ea8
0x3698ea8: f64 = fdiv ConstantFP:f64<0.000000e+00>, 0x36a27f0
0x3698e40: f64 = ConstantFP<0.000000e+00>
0x36a27f0: f64,ch = CopyFromReg 0x3580fe8, Register:f64 %5
0x3510148: f64 = Register %5
0x3510218: i64 = Constant<0>
0x3510218: i64 = Constant<0>
In function: _ZGVdN8uuuu_TS18codegen_or_jit_bug
Please report the issue on Intel OpenCL forum
https://software.intel.com/en-us/forums/opencl for assistance.
Stack dump:
0. Running pass 'Function Pass Manager' on module 'main'.
1. Running pass 'X86 DAG->DAG Instruction Selection' on function ''
Aborted (core dumped)
I'm currently using the OpenCL CPU runtime mentioned in the Getting Started guide, so perhaps it's a little out of date. It's also feasible that my environment is somewhat misconfigured and this isn't a bug as I had to uninstall an older OpenCL CPU installation (however, I can run all the existing test suite minus two SYCL tests relating to vector integer builtins (perhaps related) and restrict).
Other than that I'm using Ubuntu 19.10 and the CPU Model I'm using at the moment is: Intel(R) Core(TM) i5-7600K CPU @ 3.80GHz