[turbofan] Optimize division/modulus by constant.

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 d6edb45e7c16b406e3257b0106f889d6b113be6d..add0a3f2b1fc17f47ffc1926844fadaadedb303f 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -455,6 +455,16 @@ void InstructionSelector::VisitInt32Mul(Node* node) {
 }
 
 
+void InstructionSelector::VisitInt32MulHigh(Node* node) {
+  IA32OperandGenerator g(this);
+  InstructionOperand* temps[] = {g.TempRegister(eax)};
+  size_t temp_count = arraysize(temps);
+  Emit(kIA32ImulHigh, g.DefineAsFixed(node, edx),
+       g.UseFixed(node->InputAt(0), eax), g.UseRegister(node->InputAt(1)),
+       temp_count, temps);
+}
+
+
 static inline void VisitDiv(InstructionSelector* selector, Node* node,
                             ArchOpcode opcode) {
   IA32OperandGenerator g(selector);