When to name references to the same name are represented by
a shared JS AST node, setting line number of the second usage may
override line number of the first usage.
Also, supply more JS AST nodes related to default parameters,
with corresponding source information.
Add test infrastructure that allows to test handwritten JS
to test various small aspects of DCE, as opposed to box tests
which test kotlin stdlib + kotlin generated examples
Introduce directives to assert minification rate (MINIFIER_THRESHOLD)
and to skip DCE test at all (SKIP_MINIFIER).
Allow to run DCE on some of the box tests by default.
The main reason is avoiding complicated operations like
dup + dup_x2 + pop2 for instances obtained by NEW instruction.
Otherwise it leads to problems in performRefinedTypeAnalysis
because code there has a sensible assumption that NEW instances
can be only dupped or stored into a local (rare cases)
#KT-17457 Fixed
Support Comparable#compareTo for boxed primitive in redundant
boxing/unboxing analysis, along with CHECKCAST to java.lang.Comparable.
Note that we can do that for Float and Double, too, because
Float#compareTo(Float) and Double#compareTo(Double) are delegated to
Float#compare(float, float) and Double#compare(double, double),
respectively.
Fuse specialized comparison for integers with conditional jumps
if possible (both for Comparable#compareTo and Intrinsics#areEqual).
#KT-11959 Fixed
In code like 'a?.b == 42', we can immediately generate equality
comparison result when receiver is null (false for '==', true for '!='),
since the primitive value is definitely non-null.
Otherwise unnecessary boxing/unboxing is generated to handle possibly
null result of 'a?.b'.
The problem was that the resume call (from doResume) for open members
was based on common INVOKEVIRTUAL to the original function
that lead to the invocation of the override when it was expected
to be the overridden (after super-call being suspended)
The solution is to generate method bodies for open members into
the special $suspendImpl synthetic function that may be called
from the doResume implementation
#KT-17587 Fixed
Dmitry Petrov