[llvm] [AMDGPU] Fix crash due to assertion failure (PR #123627)

[Matt Arsenault via llvm-commits]

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@@ -1223,3 +1223,21 @@ body:             |
     early-clobber renamable $vgpr2 = V_CVT_SCALEF32_SR_PK_FP4_F16_e64 8, killed $vgpr0, 0, killed $vgpr3, 4, killed $vgpr1, killed $vgpr1, 0, implicit $mode, implicit $exec
     S_SETPC_B64_return undef $sgpr30_sgpr31, implicit killed $vgpr0
 ...
+
+---
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arsenm wrote:

But it's not a gfx950 specific hazard, it still doesn't belong here 

https://github.com/llvm/llvm-project/pull/123627