Type annotations for instruction operands are omitted, e.g.
```
%3 = struct $S(%1, %2)
```
Operand types are redundant anyway and were only used for sanity checking in the SIL parser.
But: operand types _are_ printed if the definition of the operand value was not printed yet.
This happens:
* if the block with the definition appears after the block where the operand's instruction is located
* if a block or instruction is printed in isolation, e.g. in a debugger
The old behavior can be restored with `-Xllvm -sil-print-types`.
This option is added to many existing test files which check for operand types in their check-lines.
When a NoncopyableGenericsMismatch happens between the compiler and
stdlib, allow the compiler to rebuild the stdlib from its interface
instead of exiting with an error.
The "no implicit copy" parameters such as a `consuming` or `borrowing`
parameter of an otherwise Copyable type was not being handled correctly
by `conformsToInvertible`. We don't have conformances for SIL types in
the AST, so they're supposed to be handled earlier.
fixes rdar://120462547
A TypeExpr and other kinds of non-lvalue bases that the borrowed-base
visitor doesn't care about can be handled by calling back into the
original SILGenLValue instance.
resolves rdar://117082469
