aab854596f
This ends up disabling frame pointer elimination on aarch64_apple_darwin which matches what clang does by default along with the aarch64_apple_ios and x86_64_apple_darwin targets. Further, the Apple docs "Writing ARM64 Code for Apple Platforms" has a section called "Respect the Purpose of Specific CPU Registers" which specifically calls out the frame pointer register (x29): The frame pointer register (x29) must always address a valid frame record. Some functions — such as leaf functions or tail calls — may opt not to create an entry in this list As a result, stack traces are always meaningful, even without debug information. Other platforms are updated to not override the default. |
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