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

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

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index d6959b3db9ef074ef1429ceaec5520eb9afd850f..ca277deb40e3ff7788a4121cb052c56563598235 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -1231,6 +1231,12 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       __ vsel(gt, result, a, b);
       break;
     }
+    case kArmFloat64SilenceNaN: {
+      DwVfpRegister value = i.InputFloat64Register(0);
+      DwVfpRegister result = i.OutputFloat64Register(0);
+      __ VFPCanonicalizeNaN(result, value);
+      break;
+    }
     case kArmPush:
       if (instr->InputAt(0)->IsFPRegister()) {
         LocationOperand* op = LocationOperand::cast(instr->InputAt(0));