evaluator to precisely evaluate Builtin.assert_configuration.
Unify UnknownReason::Trap and UnknownReason::AssertionFailure error
values in the constant evaluator, now that we have 'condfail_message'
SIL instruction, which provides an error message for the traps.
@_semantics("constant_evaluable") annotation to denote constant
evaluable functions.
Add a test suite that uses the sil-opt pass ConstantEvaluableSubsetChecker.cpp
to check the constant evaluability of function in the OSLog
overlay.
the builtin.globalStringTablePointer to the new OSLog overlay.
Modify the new OSLog implementation to use this SPI instead of
`withCString` to pass the (compiler-generated) format string to
the C os_log_impl ABI.
Move the OSLogOptimization pass before constant propagation in
the pass pipeline so that the SPI and the builtin it uses can be
folded to a string_literal instruction.
Update OSLogTests to work with the changes in the implementation.
With the advent of dynamic_function_ref the actual callee of such a ref
my vary. Optimizations should not assume to know the content of a
function referenced by dynamic_function_ref. Introduce
getReferencedFunctionOrNull which will return null for such function
refs. And getInitialReferencedFunction to return the referenced
function.
Use as appropriate.
rdar://50959798
Fixes the following warning:
```console
third_party/unsupported_toolchains/swift/src/swift/lib/SILOptimizer/Mandatory/OSLogOptimization.cpp:396:1: warning: control may reach end of non-void function [-Wreturn-type]
}
^
```
