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

[Jay Foad via llvm-commits]

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@@ -165,9 +165,8 @@ define <2 x i16> @v_add_v2i16_neg_inline_imm_splat(<2 x i16> %a) {
 ; GFX7-LABEL: v_add_v2i16_neg_inline_imm_splat:
 ; GFX7:       ; %bb.0:
 ; GFX7-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
-; GFX7-NEXT:    s_movk_i32 s4, 0xffc0
-; GFX7-NEXT:    v_add_i32_e32 v0, vcc, s4, v0
-; GFX7-NEXT:    v_add_i32_e32 v1, vcc, s4, v1
+; GFX7-NEXT:    v_add_i32_e32 v0, vcc, 0xffffffc0, v0
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jayfoad wrote:

Folding improvements here.

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