[clang] [llvm] [AArch64][clang][llvm] Add ACLE Armv9.7 lookup table intrinsics (PR #187046)

[via cfe-commits]

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@@ -3932,6 +3932,17 @@ class sme2_lut_single<string asm>
   let Inst{4-0}   = Zd;
 }
 
+multiclass sme2_lut_single_pat<Instruction inst, SDPatternOperator intrinsic> {
+  def : Pat<(nxv16i8 (intrinsic (imm_to_zt untyped:$zt), nxv16i8:$zn)),
+            (inst $zt, nxv16i8:$zn)>;
+}
+
+multiclass sme2_lut_single<string asm, SDPatternOperator intrinsic> {
+  def NAME : sme2_lut_single<asm>;
+
+  defm : sme2_lut_single_pat<!cast<Instruction>(NAME), intrinsic>;
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CarolineConcatto wrote:

We can just copy the pattern in here:
 def : Pat<(nxv16i8 (intrinsic (imm_to_zt untyped:$zt), nxv16i8:$zn)),
            (inst $zt, nxv16i8:$zn)>;
and remote the multiclass just for the pattern.

https://github.com/llvm/llvm-project/pull/187046