Add Simd128 register case to graph visualizer

Change-Id: Ia5c6793f22b3eeff3614542e455d46daa76657a0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1948792Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65324}

src/compiler/graph-visualizer.cc

@@ -748,9 +748,11 @@ void GraphC1Visualizer::PrintLiveRange(const LiveRange* range, const char* type,
         os_ << " \"" << Register::from_code(op.register_code()) << "\"";
       } else if (op.IsDoubleRegister()) {
         os_ << " \"" << DoubleRegister::from_code(op.register_code()) << "\"";
-      } else {
-        DCHECK(op.IsFloatRegister());
+      } else if (op.IsFloatRegister()) {
         os_ << " \"" << FloatRegister::from_code(op.register_code()) << "\"";
+      } else {
+        DCHECK(op.IsSimd128Register());
+        os_ << " \"" << Simd128Register::from_code(op.register_code()) << "\"";
       }
     } else if (range->spilled()) {
       const TopLevelLiveRange* top = range->TopLevel();