[llvm] [Draft][AMDGPU] Rematerialize VGPR candidates when SGPR spills results in VGPR Excess (PR #168079)

[Juan Manuel Martinez Caamaño via llvm-commits]

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+; RUN: llc -O3 -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1201 %s -o - | FileCheck %s
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jmmartinez wrote:

I've been struggling to write a proper .mir test for this. Any suggestions are welcomed.

https://github.com/llvm/llvm-project/pull/168079