[SYCL] Add lit test for integer math function abs, labs, llabs

[haonanya]

Signed-off-by: haonanya haonan.yang@intel.com
This PR aims to add lit test for intel/llvm#3364

[vladimirlaz]

The tests is passing before submission of intel/llvm#3364. I expected that the test should fail until the device library change is submitted.

[jinge90]

The tests is passing before submission of intel/llvm#3364. I expected that the test should fail until the device library change is submitted.

Hi, @vladimirlaz
You are correct, this test should fail without compiler device library abs support. The reason why pass here is in device compilation, FE will convert function call "abs" to llvm.abs intrinsic and llvm-spirv can support this intrinsic now.
We will add "-fno-builtin" to the math test and then all math function call will reside in device code and device library will support them.
Thanks very much.

[jinge90]

@haonanya
Could you add "-fno-builtin" to the building command?

[vladimirlaz]

@haonanya
Could you add "-fno-builtin" to the building command?

[haonanya]

Hi, @vladimirlaz. Sorry for late reply. There are some compiling issues when added "-fno-builtin" to the building command in Windows, we are looking into this issue.
Thanks very much.

[jinge90]

Hi, @vladimirlaz
This test are expected to work when intel/llvm#3472 is merged.
Thanks very much.

[vladimirlaz]

The failures below do not correlate with the PR:

• SYCL :: Regression/implicit_offset_debug_info.cpp
• SYCL :: USM/pointer_query.cpp