[X86][SSE] Added TODO comment to add support for AVX512 mask registers to shuffle comments

This came up in discussion on D19198

llvm-svn: 268915
diff --git a/llvm/lib/Target/X86/InstPrinter/X86InstComments.cpp b/llvm/lib/Target/X86/InstPrinter/X86InstComments.cpp
index 5e0dd4f..a82dc3e 100644
--- a/llvm/lib/Target/X86/InstPrinter/X86InstComments.cpp
+++ b/llvm/lib/Target/X86/InstPrinter/X86InstComments.cpp
@@ -741,6 +741,7 @@
   if (ShuffleMask.empty())
     return false;
 
+  // TODO: Add support for specifying an AVX512 style mask register in the comment.
   if (!DestName) DestName = Src1Name;
   OS << (DestName ? DestName : "mem") << " = ";
 
diff --git a/llvm/lib/Target/X86/X86MCInstLower.cpp b/llvm/lib/Target/X86/X86MCInstLower.cpp
index 83c9926..6e8b09f 100644
--- a/llvm/lib/Target/X86/X86MCInstLower.cpp
+++ b/llvm/lib/Target/X86/X86MCInstLower.cpp
@@ -1109,6 +1109,7 @@
     return X86ATTInstPrinter::getRegisterName(RegNum);
   };
 
+  // TODO: Add support for specifying an AVX512 style mask register in the comment.
   StringRef DstName = DstOp.isReg() ? GetRegisterName(DstOp.getReg()) : "mem";
   StringRef Src1Name =
       SrcOp1.isReg() ? GetRegisterName(SrcOp1.getReg()) : "mem";