[turbofan] Introduce integer multiplication with overflow.

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

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index d959a5d34d6e188a9da6ba448b779d622b1e11b1..c9192e44634c301d4fc9ce6754ca647bf42bf994 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -863,6 +863,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
+    case kArmSmull:
+      __ smull(i.OutputRegister(0), i.OutputRegister(1), i.InputRegister(0),
+               i.InputRegister(1));
+      break;
     case kArmSmmul:
       __ smmul(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       DCHECK_EQ(LeaveCC, i.OutputSBit());