llvm-project

f82023d7 - [clang][driver][arm][macho] Default to -mframe-pointer=non-leaf. (#154216)

[clang][driver][arm][macho] Default to -mframe-pointer=non-leaf. (#154216) The commit in [1] changes the behavior of the Arm backend for the attribute frame-pointer=all. Before [1], leaf functions marked with frame-pointer=all were not emitting the frame-pointer. After [1], frame-pointer=all started generating frame pointer for all functions, including leaf functions. However, the default behavior for the driver in clang is to emit the command line option `-mframe-pointer=all` on Arm, if no options for handling the frame pointer is specified at command line. This causes observable regressions. This patch addresses these regressions by configuring the driver so to emit `-mframe-pointer=non-leaf` when targeting Arm. Codegen tests dealing with frame pointer generation have been extended to handle functions with a tail call, since this configuration was missing. [1] 4a2bd78f5b0d0661c23dff9c4b93a393a49dbf9a