[llvm-bugs] [Bug 31306] New: [AVX-512] Compiler crash: Cannot select: t41: v8i64 = X86ISD::SUBV_BROADCAST

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31306

            Bug ID: 31306
           Summary: [AVX-512] Compiler crash: Cannot select: t41: v8i64 =
                    X86ISD::SUBV_BROADCAST
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: babokin at gmail.com
                CC: llvm-bugs at lists.llvm.org, Vsevolod.Livinskij at frtk.ru
    Classification: Unclassified

Created attachment 17732
  --> https://llvm.org/bugs/attachment.cgi?id=17732&action=edit
reproducer

This is recently introduced bug in trunk. It's reproduced with skx and knl
targets.

> clang++ -c -O2 -march=skx subv_broadcast.cpp
fatal error: error in backend: Cannot select: t41: v8i64 =
X86ISD::SUBV_BROADCAST t40
  t40: v4i64,ch = load<LD32[ConstantPool]> t0, t49, undef:i64
    t49: i64 = X86ISD::Wrapper TargetConstantPool:i64<<4 x i64> <i64 -4096, i64
-1099511627776, i64 -4294967296, i64 -8589934592>> 0
      t48: i64 = TargetConstantPool<<4 x i64> <i64 -4096, i64 -1099511627776,
i64 -4294967296, i64 -8589934592>> 0
    t3: i64 = undef
In function: _Z1ov
clang-4.0: error: clang frontend command failed with exit code 70 (use -v to
see invocation)
clang version 4.0.0 (trunk 288907)
Target: x86_64-unknown-linux-gnu

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