[turbofan] Introduce integer multiplication with overflow.

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

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 1256 matching lines @@
           Node* const node = value->InputAt(0);
           Node* const result = NodeProperties::FindProjection(node, 0);
           if (!result || selector->IsDefined(result)) {
             switch (node->opcode()) {
               case IrOpcode::kInt32AddWithOverflow:
                 cont->OverwriteAndNegateIfEqual(kOverflow);
                 return VisitBinop(selector, node, kMipsAddOvf, cont);
               case IrOpcode::kInt32SubWithOverflow:
                 cont->OverwriteAndNegateIfEqual(kOverflow);
                 return VisitBinop(selector, node, kMipsSubOvf, cont);
+              case IrOpcode::kInt32MulWithOverflow:
+                cont->OverwriteAndNegateIfEqual(kOverflow);
+                return VisitBinop(selector, node, kMipsMulOvf, cont);
               default:
                 break;
             }
           }
         }
         break;
       case IrOpcode::kWord32And:
         return VisitWordCompare(selector, value, kMipsTst, cont, true);
       default:
         break;
@@ skipping 114 matching lines @@
 
 void InstructionSelector::VisitInt32SubWithOverflow(Node* node) {
   if (Node* ovf = NodeProperties::FindProjection(node, 1)) {
     FlagsContinuation cont = FlagsContinuation::ForSet(kOverflow, ovf);
     return VisitBinop(this, node, kMipsSubOvf, &cont);
   }
   FlagsContinuation cont;
   VisitBinop(this, node, kMipsSubOvf, &cont);
 }
 
+void InstructionSelector::VisitInt32MulWithOverflow(Node* node) {
+  if (Node* ovf = NodeProperties::FindProjection(node, 1)) {
+    FlagsContinuation cont = FlagsContinuation::ForSet(kOverflow, ovf);
+    return VisitBinop(this, node, kMipsMulOvf, &cont);
+  }
+  FlagsContinuation cont;
+  VisitBinop(this, node, kMipsMulOvf, &cont);
+}
 
 void InstructionSelector::VisitFloat32Equal(Node* node) {
   FlagsContinuation cont = FlagsContinuation::ForSet(kEqual, node);
   VisitFloat32Compare(this, node, &cont);
 }
 
 
 void InstructionSelector::VisitFloat32LessThan(Node* node) {
   FlagsContinuation cont = FlagsContinuation::ForSet(kUnsignedLessThan, node);
   VisitFloat32Compare(this, node, &cont);
@@ skipping 169 matching lines @@
     DCHECK(IsMipsArchVariant(kLoongson) || IsMipsArchVariant(kMips32r1) ||
            IsMipsArchVariant(kMips32r2));
     return MachineOperatorBuilder::AlignmentRequirements::
         NoUnalignedAccessSupport();
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8