MIPS: Fix '[turbofan] Prevent storing signalling NaNs into holey double arrays.'

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

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index ba02093ce6737a07aacdeec07dd08691d1fc7094..c85569b1a980029d865998d5154bbaba86d79f22 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -1332,19 +1332,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kMipsFloat64InsertHighWord32:
       __ FmoveHigh(i.OutputDoubleRegister(), i.InputRegister(1));
       break;
-    case kMipsFloat64SilenceNaN: {
-      FPURegister value = i.InputDoubleRegister(0);
-      FPURegister result = i.OutputDoubleRegister();
-      Register scratch0 = i.TempRegister(0);
-      Label is_nan, not_nan;
-      __ BranchF(NULL, &is_nan, eq, value, value);
-      __ Branch(&not_nan);
-      __ bind(&is_nan);
-      __ LoadRoot(scratch0, Heap::kNanValueRootIndex);
-      __ ldc1(result, FieldMemOperand(scratch0, HeapNumber::kValueOffset));
-      __ bind(&not_nan);
+    case kMipsFloat64SilenceNaN:
+      __ FPUCanonicalizeNaN(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
-    }
 
     // ... more basic instructions ...