[llvm] [DAGCombiner] Set shift flags during visit. (PR #91239)

[Matt Arsenault via llvm-commits]

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@@ -81,7 +81,8 @@ define amdgpu_ps float @v_test_cvt_f32_bf16_v(float %src) {
 ; GCN-NEXT:    v_cmp_u_f32_e32 vcc, v0, v0
 ; GCN-NEXT:    s_nop 1
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v1, v2, vcc
-; GCN-NEXT:    v_and_b32_e32 v0, 0xffff0000, v0
+; GCN-NEXT:    v_lshrrev_b32_e32 v0, 16, v0
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arsenm wrote:

More regression 

https://github.com/llvm/llvm-project/pull/91239