Reviewers: fschneider,
Message:
As we discussed, control dependencies are not yet handled. We need to find
a
cheap way to do so.
Description:
Initial support for marking live code.
As part of aggressive dead code elimination, we initially assume all
flow-graph instructions are not live. We mark those that are critical
and recursively all their children. The children of variable
references (VariableProxies occurring as rvalues) include all their
reaching definitions.
Please review this at http://codereview.chromium.org/1159005
Affected files:
M src/ast.h
M src/ast.cc
M src/compiler.cc
M src/data-flow.h
M src/data-flow.cc
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