Matt Arsenault ccad5e7744 AMDGPU: Respect amdgpu-no-agpr in functions and with calls (#128147) ...

Remove the MIR scan to detect whether AGPRs are used or not,
and the special case for callable functions. This behavior was
confusing, and not overridable. The amdgpu-no-agpr attribute was
intended to avoid this imprecise heuristic for how many AGPRs to
allocate. It was also too confusing to make this interact with
the pending amdgpu-num-agpr replacement for amdgpu-no-agpr.

Also adds an xfail-ish test where the register allocator asserts
after allocation fails which I ran into.

Future work should reintroduce a more refined MIR scan to estimate
AGPR pressure for how to split AGPRs and VGPRs.

2025-02-23 09:00:37 +07:00

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