[CIR] Handle __asm labels on function declarations (#168149)

This updates the CIR direct callee builder code to handle the case of
calls to functions that were declared with an assembly label using
`__asm`. The implementation doesn't actually have any explicit handling
of the AsmLabelAttr. It is handled by the name mangler.

See https://reviews.llvm.org/D137073 and
https://reviews.llvm.org/D134362 for details on how this was implemented
in classic codegen. The test here is copied from
https://reviews.llvm.org/D134362 because the test in
https://reviews.llvm.org/D134362 requires a target that isn't yet
supported in CIR.

0 files changed, 0 insertions, 0 deletions