Reimplement the same hacky approach used in the old backend (see
cc2fe6b0c6).
Previously, the debugger incorrectly stepped into Collections.kt on
"step over" inline function calls from stdlib like 'any'.
Since `if` and `when` expressions are represented the same way in IR,
the behavior is fixed for both of them. It's not the case in the old JVM
backend, where stepping over `when` conditions still suffers from the
same problem, which the newly added test checks.
Declarations inside that class are referencing the type parameters of
the containing function anyway, since we don't do any remapping. So the
resulting IR is slightly more correct, and doesn't lead to type
parameter/argument size mismatch error on IrBased/Wrapped-descriptors.
This reverts a part of 01da7f289b, which looks like it was no longer
necessary after 8d0ffa1444.
#KT-42028 Fixed
Loads of temporary variables that contain constants are replaced
with a copy of the constant. This avoids locals loads and stores.
However, the copy of the constant needs to have the offset of
the load and not of the original constant.
Fixes KT-41963.
Helps fixing to more specific type in the following situations:
Type1 <: Var1
Var2 <: Var1
Var2 <: Type2
Type1 and Type2 may also be nullable and non-nullable versions of the same type.
Note that no additional constraints can be inferred from such constraints before fixation.
Resulting types for variables will always Type1 and Type2 may also be nullable and non-nullable versions of the same type.
Fixing Var1 first will make Var2's type more specific while fixing Var2 first
will make Var1's type less specific. The first is preferrable in general.
The "free" in "createFreeFakeLambdaDescriptor" and such refers to the
fact that there are no references to type parameters from outside the
current declaration. This is necessary because at the point where the
metadata is written, the type parameters may not even be in scope (e.g.
local delegated properties are serialized at class level, but may refer
to function-scope type parameters).
This fixes smart step into for delegated member functions.
Additionally, we align on the string "memberFunctionName(...)"
for expression non-null checks for both JVM_IR and JVM
backends.
Victor Petukhov