[llvm-bugs] [Bug 33690] New: [X86][AVX512] Add support for ISD::ROTL/ISD::ROTR

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Jul 5 02:48:29 PDT 2017


            Bug ID: 33690
           Summary: [X86][AVX512] Add support for ISD::ROTL/ISD::ROTR
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: elena.demikhovsky at intel.com, llvm-bugs at lists.llvm.org,
                    zvi.rackover at intel.com

AVX512 has vector rotate instructions:

vector rotate by scalar immediate: VPROLD/VPRORD and VPROLQ/VPRORQ
vector rotate by vector values: VPROLVD/VPRORVD and VPROLVQ/VPRORVQ

but we can't lower to them (see D12833)

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