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This commit adds a do-nothing phase called "Delambdafy" that will
eventually be responsible for doing the final translation of lambdas
into classes.
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Patern translation now happens earlier.
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Let optimiser components and continuations plugin opt-out
when required flags are not set.
Wasted time on a whitespace error in check file, so let
--debug dump the processed check file and its diff.
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Refactor the calculation of the "phase chain" a bit.
In particular, initial and terminal phases are not special
except that they must be head and last.
When done, filter for enabled phases. At this commit,
nobody claims to be disabled.
Additional sanity support of phases settings.
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This commit adds analysis and optimization of constants to remove
unnecessary branches. It uses abstract interpretation to determine
what constant(s) a particular stack slot or variable might or might not
hold at a given spot and uses that knowledge to eliminate branches that
cannot be taken. Its primary goal is null check removal, but it also
works for other constants.
Several tests are modified to include the new optimization phase.
Two new tests are added. One verifies that branching still works as
expected. The other verifies that branches are removed.
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In Global, SubComponent is called a phase descriptor, but it doesn't
actually have a description. (Phase itself does.) This fix adds
a description to PluginComponent so that plugins can describe what
they do in -Xshow-phases.
Elliptical descriptions
Exploded archives
Plugged-in partest
Roundup at the Little h!
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