tree 09923f82912c990dca6b7f573fdc58de31b22a2c
parent 62732c87b889f20bc60b99c5675f7c2cc9ccdef1
author Martin Storsjo <martin@martin.st> 1714513541 +0300
committer James Zern <jzern@google.com> 1714679212 +0000

cpu.cmake: Do more elaborate test of whether SVE can be compiled

For Windows targets, Clang will successfully compile simpler
SVE functions, but if the function requires backing up and restoring
SVE registers (as part of the AAPCS calling convention), Clang
will fail to generate unwind data for this function, resulting
in an error.

This issue is tracked upstream in Clang in
https://github.com/llvm/llvm-project/issues/80009.

Check whether the compiler can compile such a function, and
disable SVE if it is unable to handle that case.

Change-Id: I307d7398cedd1942c39ef034431a51696264ff47