tree 416fdaa3fa106f6955d6fe1dfa4f35a65e9139df
parent 46145a2d817526bb08d4b48e3ed4311eecb97b64
author Martin Storsjo <martin@martin.st> 1714513541 +0300
committer James Zern <jzern@google.com> 1714758430 +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
(cherry picked from commit 5ccdc66ab6eb8eb300eda854fab4ff250b2c2f92)