[LLVMbugs] [Bug 6151] New: llc -O3: invalid assembler: Error: can't encode register ' %dh' in an instruction requiring REX prefix.

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=6151

           Summary: llc -O3: invalid assembler: Error: can't encode register
                    '%dh' in an instruction requiring REX prefix.
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: baldrick at free.fr
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=4120)
 --> (http://llvm.org/bugs/attachment.cgi?id=4120)
testcase .ll

$ llc -O3 gs.bc && as gs.s
gs.s: Assembler messages:
gs.s:35: Error: can't encode register '%dh' in an instruction requiring REX
prefix.

The line in question is:
        movb    %dh, %dil  # NOREX


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