Hi,

We have decided to backport this patch to fix callee-saved register corruption 
when clobbering sp to our embedded-6-branch.

*** gcc/ChangeLog.arm ***

         PR target/77904
         * config/arm/arm.c (thumb1_compute_save_reg_mask): Mark frame pointer
         in save register mask if it is needed.


*** gcc/testsuite/ChangeLog.arm ***

         PR target/77904
         * gcc.target/arm/pr77904.c: New test.


Best regards,

Thomas