[turbofan] Introduce integer multiplication with overflow.

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 a42367512de17de5ec58084f3baa2d137937c03e..747b47bf99eef518d224a08f2b631158cdb82665 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -1407,6 +1407,9 @@ void VisitWordCompareZero(InstructionSelector* selector, Node* user,
               case IrOpcode::kInt32SubWithOverflow:
                 cont->OverwriteAndNegateIfEqual(kOverflow);
                 return VisitBinop(selector, node, kIA32Sub, cont);
+              case IrOpcode::kInt32MulWithOverflow:
+                cont->OverwriteAndNegateIfEqual(kOverflow);
+                return VisitBinop(selector, node, kIA32Imul, cont);
               default:
                 break;
             }
@@ -1531,6 +1534,14 @@ void InstructionSelector::VisitInt32SubWithOverflow(Node* node) {
   VisitBinop(this, node, kIA32Sub, &cont);
 }
 
+void InstructionSelector::VisitInt32MulWithOverflow(Node* node) {
+  if (Node* ovf = NodeProperties::FindProjection(node, 1)) {
+    FlagsContinuation cont = FlagsContinuation::ForSet(kOverflow, ovf);
+    return VisitBinop(this, node, kIA32Imul, &cont);
+  }
+  FlagsContinuation cont;
+  VisitBinop(this, node, kIA32Imul, &cont);
+}
 
 void InstructionSelector::VisitFloat32Equal(Node* node) {
   FlagsContinuation cont = FlagsContinuation::ForSet(kUnorderedEqual, node);