[llvm-bugs] [Bug 36887] New: [X86] Vector extract instructions marked as Ld and WriteRMW

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36887

            Bug ID: 36887
           Summary: [X86] Vector extract instructions marked as Ld and
                    WriteRMW
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: craig.topper at gmail.com
                CC: llvm-bugs at lists.llvm.org

For example

PEXTRBmr has WriteShuffleLd WriteRMW

But the instruction doesn't load anything.

Affected instructions

EXTRACTPSmr
PEXTRBmr
PEXTRDmr
PEXTRQmr
PEXTRWmr
VCVTPS2PHYmr
VCVTPS2PHmr
VEXTRACTPSmr
VPEXTRBZmr
VPEXTRBmr
VPEXTRDZmr
VPEXTRDmr
VPEXTRQZmr
VPEXTRQmr
VPEXTRWZmr
VPEXTRWmr

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