[llvm-bugs] [Bug 41573] New: [Clang IA] missing support for msr/mrs/sys/sysl instructions

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Apr 23 11:13:33 PDT 2019


            Bug ID: 41573
           Summary: [Clang IA] missing support for msr/mrs/sys/sysl
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: ndesaulniers at google.com
                CC: kristof.beyls at arm.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, oliver.stannard at arm.com,
                    peter.smith at linaro.org, richard-llvm at metafoo.co.uk,
                    srhines at google.com

The linux kernel makes use of msr/mrs instructions in inline assembly (and is
looking to add sys/sysl) for arm64.  We cannot turn on Clang's integrated
assembler for arm64 due to the above instructions being unsupported.


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