MIPS: [turbofan] Also optimize unsigned division by constant.

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

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index 9a8b98a6355409f5eb72e27cdc2aee6f4b59772c..2a079404730de74a0a71050174d2564002894a8e 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -188,6 +188,9 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
     case kMipsMulHigh:
       __ Mulh(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
+    case kMipsMulHighU:
+      __ Mulhu(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+      break;
     case kMipsDiv:
       __ Div(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;