[llvm-bugs] [Bug 28915] New: multiple piglit builtin-short* and builtin-ushort tests fails

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28915

            Bug ID: 28915
           Summary: multiple piglit builtin-short* and builtin-ushort
                    tests fails
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P
         Component: Backend: AMDGPU
          Assignee: unassignedbugs at nondot.org
          Reporter: pavel.ondracka at email.cz
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Some failing tests:
builtin-char-upsample-1.0.generated
builtin-short-abs-1.0.generated
builtin-short-abs_diff-1.0.generated
builtin-short-add_sat-1.0.generated
builtin-short-clamp-1.1.generated
builtin-short-clz-1.0.generated
builtin-short-hadd-1.0.generated
builtin-ushort-abs-1.0.generated
and more

>From the tests its always just the 4, 8 and 16 subtests that fails, the 1 and 2
subtests pass.

The regression happened roughly between the beginning of May and end of July,
however since there was some long-time build breakage between llvm/clang and
libclc in the meantime I'm unable to bisect.

System:
GPU: 06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Caicos XTX [Radeon HD 8490 / R5 235X OEM]
llvm: 5a9fa77faf0b8794428b3072b28b7f15d898d52a
libclc: 8243e979a42c48c6b018995d35e8a371014b59da
mesa: 8c4d9afb7e770f312079994994f42ddebf7e641c

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