Eliminate intentional conversion from Smi to Int32 in HMul

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 07ca55f7f22b2cc1a70734af7f819aebac1561eb..99a97f9333208b237c3242f715e24a63c1a5e570 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -431,7 +431,7 @@ Register LCodeGen::EmitLoadRegister(LOperand* op, Register scratch) {
     } else if (r.IsDouble()) {
       Abort(kEmitLoadRegisterUnsupportedDoubleImmediate);
     } else {
-      ASSERT(r.IsTagged());
+      ASSERT(r.IsSmiOrTagged());
       __ LoadObject(scratch, literal);
     }
     return scratch;
@@ -1583,10 +1583,7 @@ void LCodeGen::DoMulI(LMulI* instr) {
     instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero);
 
   if (right_op->IsConstantOperand() && !can_overflow) {
-    // Use optimized code for specific constants.
-    int32_t constant = ToRepresentation(
-        LConstantOperand::cast(right_op),
-        instr->hydrogen()->right()->representation());
+    int32_t constant = ToInteger32(LConstantOperand::cast(right_op));
 
     if (bailout_on_minus_zero && (constant < 0)) {
       // The case of a null constant will be handled separately.