Shilei Tian a779af3f88 [AMDGPU] Change SGPR layout to striped caller/callee saved (#127353) ...

This PR updates the SGPR layout to a striped caller/callee-saved design,
similar
to the VGPR layout.

To ensure that s30-s31 (return address), s32 (stack pointer), s33 (frame
pointer), and s34 (base pointer) remain callee-saved, the striped layout
starts
from s40, with a stripe width of 8. The last stripe is 10 wide instead
of 8 to
avoid ending with a 2-wide stripe.

Fixes #113782.

2025-03-08 09:28:20 -05:00

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