[turbofan] Introduce simplified NumberBitwise{Or,Xor,And} operators.

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index a5d529557ec235304bef1a299c9487582330dc59..aa8ed35fe9043d084c666af04438b5dbc606a81a 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -718,6 +718,13 @@ class RepresentationSelector {
         if (lower()) NodeProperties::ChangeOp(node, Float64Op(node));
         break;
       }
+      case IrOpcode::kNumberBitwiseOr:
+      case IrOpcode::kNumberBitwiseXor:
+      case IrOpcode::kNumberBitwiseAnd: {
+        VisitBinop(node, kMachInt32, kMachUint32, kMachInt32);

[Jarin, 2015/10/27 08:30:42]

This seems wrong, why is the right use UInt32? I believe you can just use
VisitInt32Binop(node) here.

[Benedikt Meurer, 2015/10/27 08:31:32]

Done.

+        if (lower()) NodeProperties::ChangeOp(node, Int32Op(node));
+        break;
+      }
       case IrOpcode::kNumberShiftLeft: {
         VisitBinop(node, kMachInt32, kMachUint32, kMachInt32);
         if (lower()) lowering->DoShift(node, lowering->machine()->Word32Shl());