[turbofan] Prevent storing signalling NaNs into holey double arrays.

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index 43633e0de41d89af5c32765a8e4ea4f6ef812643..9c8a08631a01dc081fab3b9764c1e54f5488b4f7 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -1545,6 +1545,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       }
       break;
     }
+    case kSSEFloat64SilenceNaN:
+      __ Xorpd(kScratchDoubleReg, kScratchDoubleReg);
+      __ Subsd(i.InputDoubleRegister(0), kScratchDoubleReg);
+      break;
     case kX64Movsxbl:
       ASSEMBLE_MOVX(movsxbl);
       __ AssertZeroExtended(i.OutputRegister());