[llvm] [X86] Add constant comments for VGF2P8AFFINEQB rmbi forms (PR #194789)

[Simon Pilgrim via llvm-commits]

================
@@ -1944,18 +1960,18 @@ static void addConstantComments(const MachineInstr *MI,
   case X86::VGF2P8AFFINEQBZrmi:
   case X86::VGF2P8AFFINEQBZ128rmi:
   case X86::VGF2P8AFFINEQBZ256rmi: {
-    // TODO: Add predicate / broadcast handling with test coverage.
     unsigned SrcIdx = getSrcIdx(MI, 1);
-    if (auto *C = X86::getConstantFromPool(*MI, SrcIdx + 1)) {
-      std::string Comment;
-      raw_string_ostream CS(Comment);
-      unsigned VectorWidth =
-          X86::getVectorRegisterWidth(MI->getDesc().operands()[0]);
-      CS << "[";
-      printConstant(C, VectorWidth, CS);
-      CS << "]";
-      OutStreamer.AddComment(CS.str());
-    }
+    unsigned VectorWidth =
+        X86::getVectorRegisterWidth(MI->getDesc().operands()[0]);
----------------
RKSimon wrote:

Don't worry about the vector name if it avoid overflow :)
```suggestion
      unsigned Width = X86::getVectorRegisterWidth(MI->getDesc().operands()[0]);
```

https://github.com/llvm/llvm-project/pull/194789