[llvm] [AMDGPU] Add new aliases ds_subrev_u32/u64 for ds_rsub_u32/u64 (PR #83118)

[Jay Foad via llvm-commits]

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@@ -23,3 +23,9 @@ ds_min_rtn_f32 v5, v1, v2
 
 ds_min_rtn_f64 v[5:6], v1, v[2:3]
 // GFX12: [0x00,0x00,0xc8,0xd9,0x01,0x02,0x00,0x05]
+
+ds_subrev_u32 v1, v2
+// GFX12: [0x00,0x00,0x08,0xd8,0x01,0x02,0x00,0x00]
+
+ds_subrev_u64 v1, v[2:3]
+// GFX12: [0x00,0x00,0x08,0xd9,0x01,0x02,0x00,0x00]
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jayfoad wrote:

Agreed. Done. I will go back and fix the existing tests separately.

https://github.com/llvm/llvm-project/pull/83118