[wasm] Int64Lowering of Word64Popcnt.

src/compiler/machine-operator.cc

Index: src/compiler/machine-operator.cc
diff --git a/src/compiler/machine-operator.cc b/src/compiler/machine-operator.cc
index 84e504f08118e3bbc5569cdbe315b99c198ba9bd..d0b7f8cf2c63a16a3ebe2e7190b10ac30a42d54b 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -471,6 +471,10 @@ const Operator* MachineOperatorBuilder::CheckedStore(
   return nullptr;
 }
 
+const Operator* MachineOperatorBuilder::Word64PopcntPlaceholder() {

[titzer, 2016/03/14 09:50:31]

Please leave a comment here about why we are doing this, i.e. that we need to
get a reference to a Word64Popcnt operator for later lowering, even though the
machine doesn't support it.

+  return &cache_.kWord64Popcnt;
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8