PVS-Studio warning V519 for Clang

void llvm::EmitAnyX86InstComments(....) {
  ...
  case X86::VPERMILPSri:
    DecodeVPERMILPSMask(4, MI->getOperand(2).getImm(),
                        ShuffleMask);
    Src1Name = getRegName(MI->getOperand(0).getReg());
  case X86::VPERMILPSYri:
    DecodeVPERMILPSMask(8, MI->getOperand(2).getImm(),
                        ShuffleMask);
    Src1Name = getRegName(MI->getOperand(0).getReg());
    break;
  ...
}

The break operator is missing.

This suspicious code was found in Clang project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'Src1Name' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 211, 215. LLVMX86AsmPrinter x86instcomments.cpp 215

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