New version with 2 changes:
a) Fixed a bug where string-only ToBoolean code ran into an incorrect
deopt.
Moral of the story: Use EmitBranch only in tail positions. :-/
b) When there is no type info for ToBoolean, generated code for handling
all
cases instead of always-deopt-code. This is essential for some benchmarks
like
checkers or deltablue. A probably better solution would be to collect type
info
from other uses in the same function and use the union of those instead, but
this will be in a separate CL.
http://codereview.chromium.org/7461107/
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