[llvm] [AMDGPU][GlobalISel] Add RegBankLegalize rules for amdgcn_perm intrinsic (PR #187798)

[Petar Avramovic via llvm-commits]

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@@ -1556,13 +1555,17 @@ RegBankLegalizeRules::RegBankLegalizeRules(const GCNSubtarget &_ST,
                  {IntrId, Vgpr32, Vgpr32, SgprB32_ReadFirstLane,
                   SgprB32_ReadFirstLane, Imm, Imm}});
 
+  addRulesForIOpcs({amdgcn_perm}, StandardB)
+      .Uni(B32, {{UniInVgprS32}, {IntrId, Vgpr32, Vgpr32, Vgpr32}})
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petar-avramovic wrote:

maybe better to use S32 since type is i32

https://github.com/llvm/llvm-project/pull/187798