[x86] Fix InstructionSelector::SupportedMachineOperatorFlags().

src/compiler/ia32/instruction-selector-ia32.cc

Index: src/compiler/ia32/instruction-selector-ia32.cc
diff --git a/src/compiler/ia32/instruction-selector-ia32.cc b/src/compiler/ia32/instruction-selector-ia32.cc
index 56af208bf437e7c73252729523fb998723674687..8a352e29972ce8d14c557641692c37785c4ea506 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -1071,13 +1071,14 @@ void InstructionSelector::VisitFloat64LessThanOrEqual(Node* node) {
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
+  MachineOperatorBuilder::Flags flags =
+      MachineOperatorBuilder::kWord32ShiftIsSafe;
   if (CpuFeatures::IsSupported(SSE4_1)) {
-    return MachineOperatorBuilder::kFloat64Floor |
-           MachineOperatorBuilder::kFloat64Ceil |
-           MachineOperatorBuilder::kFloat64RoundTruncate |
-           MachineOperatorBuilder::kWord32ShiftIsSafe;
+    flags |= MachineOperatorBuilder::kFloat64Floor |
+             MachineOperatorBuilder::kFloat64Ceil |
+             MachineOperatorBuilder::kFloat64RoundTruncate;
   }
-  return MachineOperatorBuilder::Flag::kNoFlags;
+  return flags;
 }
 
 }  // namespace compiler