[llvm-bugs] [Bug 27588] New: [AVX-512/KNL] Cannot select v16f32 = X86ISD::FMAXC

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27588

            Bug ID: 27588
           Summary: [AVX-512/KNL] Cannot select v16f32 = X86ISD::FMAXC
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: hfinkel at anl.gov
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16287
  --> https://llvm.org/bugs/attachment.cgi?id=16287&action=edit
bugpoint reduced test case

The following IR, bugpoint reduced from the test-suite's TSVC benchmark, fails
instruction selection when targeting AVX-512 (knl).

LLVM ERROR: Cannot select: 0x46ca590: v16f32 = X86ISD::FMAXC undef:v16f32,
undef:v16f32

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