[clang] [llvm] [AMDGPU] Add support for `v_exp_bf16` on gfx1250 (PR #149229)

[Stanislav Mekhanoshin via cfe-commits]

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@@ -25,4 +25,27 @@ define amdgpu_ps void @llvm_log2_bf16_s(ptr addrspace(1) %out, bfloat inreg %src
   ret void
 }
 
+define amdgpu_ps void @llvm_exp2_bf16_v(ptr addrspace(1) %out, bfloat %src) {
+; GCN-LABEL: llvm_exp2_bf16_v:
+; GCN:       ; %bb.0:
+; GCN-NEXT:    v_exp_bf16_e32 v2, v2
+; GCN-NEXT:    global_store_b16 v[0:1], v2, off
+; GCN-NEXT:    s_endpgm
+  %exp = call bfloat @llvm.exp2.bf16(bfloat %src)
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rampitec wrote:

Because it is direct access to the instruction w/o following potential legalization.

https://github.com/llvm/llvm-project/pull/149229