Reviewers: Søren Gjesse,
Description:
Handle argument conversion in StringAddStub.
In case one of the arguments is known to be a string we emit a few
fast conversion attempts for the other. This allows using the
StringAddStub instead of STRING_ADD_{LEFT,RIGHT} builtins.
Please review this at http://codereview.chromium.org/3338007/show
Affected files:
M src/ia32/code-stubs-ia32.h
M src/ia32/code-stubs-ia32.cc
M src/ia32/codegen-ia32.cc
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