LGTM
The title is somewhat misleading. We are xoring the constants, not
splitting
them into two parts.
http://codereview.chromium.org/10662045/diff/1/src/x64/full-codegen-x64.cc
File src/x64/full-codegen-x64.cc (right):
http://codereview.chromium.org/10662045/diff/1/src/x64/full-codegen-x64.cc#newcode2823
src/x64/full-codegen-x64.cc:2823: __ SafeMove(rax,
Smi::FromInt(info_->scope()->num_parameters()));
Can this ever make a difference when kMaxNumFunctionParameters is 32k?
http://codereview.chromium.org/10662045/
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