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

src/compiler/mips64/code-generator-mips64.cc

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index afa221db59a6698ddb528c83474c61c3be049c71..61356ce6b6b1fa1c8c74ef70dbc5f2b11f3c0c8f 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -1274,6 +1274,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       }
       break;
     }
+    case kMips64Float64SilenceNaN:
+      __ FPUCanonicalizeNaN(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+      break;
     case kMips64Float32Max: {
       // (b < a) ? a : b
       if (kArchVariant == kMips64r6) {