[LLVMbugs] [Bug 18833] New: ARMAsmParser fails to recognize .req directive alias name in capital letters

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18833

            Bug ID: 18833
           Summary: ARMAsmParser fails to recognize .req directive alias
                    name in capital letters
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: ARM
          Assignee: unassignedbugs at nondot.org
          Reporter: manjian2006 at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

OUTPUT_BUF      .req r2
will store "output_buf" in RegisterReqs.Because in AsmParser::parseStatement
=>  std::string OpcodeStr = IDVal.lower();
  ParseInstructionInfo IInfo(Info.AsmRewrites);
  bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, IDLoc,
                                                     Info.ParsedOperands);
The Name variable is treated as opcode string,and get lowered before
ParseInstruction.

And so unreg directive will fail who is expecting the original name(not getting
lowered).

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