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f1c6612202
debugserver isn't saving and restoring the SVE/SME register state around inferior function calls. Making arbitrary function calls while in Streaming SVE mode is generally a poor idea because a NEON instruction can be hit and crash the expression execution, which is how I missed this, but they should be handled correctly if the user knows it is safe to do. Re-landing this change after fixing an incorrect behavior on systems without SME support. rdar://146886210