[llvm] [AMDGPU] Revert "Preliminary patch for divergence driven instruction selection. Operands Folding 1." (PR #71710)

[Jay Foad via llvm-commits]

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@@ -4,7 +4,8 @@
 
 ; GCN-LABEL: {{^}}test_mfma_loop_zeroinit:
 
-; GCN-COUNT-32: v_accvgpr_write_b32 a{{[0-9]+}}, 0{{$}}
+; GCN:          v_mov_b32_e32 v0, 0{{$}}
+; GCN-COUNT-32: v_accvgpr_write_b32 a{{[0-9]+}}, v0{{$}}
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jayfoad wrote:

Lots of agpr test cases show regressions like this where we fail to fold inline constants into v_accvgpr_write_b32.

https://github.com/llvm/llvm-project/pull/71710