Simplify HUnaryMathOperation::Canonicalize.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 49f7b64f14e6b359302833d3f2be19f9087443e9..656a256f2e2d37f206ebaa71cbf01b9a68c2f9a3 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1253,7 +1253,7 @@ LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
   if (instr->representation().IsSmiOrInteger32()) {
     ASSERT(instr->left()->representation().Equals(instr->representation()));
     ASSERT(instr->right()->representation().Equals(instr->representation()));
-    if (instr->HasPowerOf2Divisor()) {
+    if (instr->RightIsPowerOf2()) {
       ASSERT(!instr->CheckFlag(HValue::kCanBeDivByZero));
       LOperand* value = UseRegisterAtStart(instr->left());
       LDivI* div =
@@ -1275,25 +1275,6 @@ LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
 }
 
 
-HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) {
-  if (divisor->IsConstant() &&
-      HConstant::cast(divisor)->HasInteger32Value()) {
-    HConstant* constant_val = HConstant::cast(divisor);
-    return constant_val->CopyToRepresentation(Representation::Integer32(),
-                                              divisor->block()->zone());
-  }
-  // A value with an integer representation does not need to be transformed.
-  if (divisor->representation().IsInteger32()) {
-    return divisor;
-  // A change from an integer32 can be replaced by the integer32 value.
-  } else if (divisor->IsChange() &&
-             HChange::cast(divisor)->from().IsInteger32()) {
-    return HChange::cast(divisor)->value();
-  }
-  return NULL;
-}
-
-
 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
   HValue* right = instr->right();
   if (!right->IsConstant()) {
@@ -1336,7 +1317,7 @@ LInstruction* LChunkBuilder::DoMod(HMod* instr) {
   if (instr->representation().IsSmiOrInteger32()) {
     ASSERT(left->representation().Equals(instr->representation()));
     ASSERT(right->representation().Equals(instr->representation()));
-    if (instr->HasPowerOf2Divisor()) {
+    if (instr->RightIsPowerOf2()) {
       ASSERT(!right->CanBeZero());
       LModI* mod = new(zone()) LModI(UseRegisterAtStart(left),
                                      UseOrConstant(right),