[turbofan] introduce Int32/64AbsWithOverflow optional operator

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 ada5741e6414cbe51a44a8685f569ac70dd0cd03..d2a5e1b4d239082ed094377b1467d1c70a46f24e 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -1838,6 +1838,14 @@ void InstructionSelector::VisitInt32x4ReplaceLane(Node* node) {
        g.Use(node->InputAt(1)));
 }
 
+void InstructionSelector::VisitInt32AbsWithOverflow(Node* node) {
+  UNREACHABLE();
+}
+
+void InstructionSelector::VisitInt64AbsWithOverflow(Node* node) {
+  UNREACHABLE();
+}
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {