[llvm] AMDGPU: Relax shouldCoalesce to allow more register tuple widening (PR #166475)

[Valery Pykhtin via llvm-commits]

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@@ -1176,28 +1176,26 @@ define i128 @v_mul_i128(i128 %num, i128 %den) {
 ; GFX12-NEXT:    s_wait_bvhcnt 0x0
 ; GFX12-NEXT:    s_wait_kmcnt 0x0
 ; GFX12-NEXT:    v_dual_mov_b32 v8, v0 :: v_dual_mov_b32 v9, v1
-; GFX12-NEXT:    v_mov_b32_e32 v10, v2
+; GFX12-NEXT:    v_dual_mov_b32 v10, v2 :: v_dual_mov_b32 v11, v3
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vpykhtin wrote:

nice!

https://github.com/llvm/llvm-project/pull/166475