diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
@@ -77,18 +77,26 @@
 
 def TruePredicate : Predicate<"">;
 
+// Add a predicate to the list if does not already exist to deduplicate it.
+class PredConcat<list<Predicate> lst, Predicate pred> {
+  list<Predicate> ret =
+    !foldl([pred], lst, acc, cur,
+           !listconcat(acc, !if(!eq(!cast<string>(cur),!cast<string>(pred)),
+                                [], [cur])));
+}
+
 class PredicateControl {
   Predicate SubtargetPredicate = TruePredicate;
-  list<Predicate> AssemblerPredicates = [];
   Predicate AssemblerPredicate = TruePredicate;
   Predicate WaveSizePredicate = TruePredicate;
   list<Predicate> OtherPredicates = [];
-  list<Predicate> Predicates = !listconcat([SubtargetPredicate,
-                                            AssemblerPredicate,
-                                            WaveSizePredicate],
-                                            AssemblerPredicates,
-                                            OtherPredicates);
+  list<Predicate> Predicates = PredConcat<
+                                 PredConcat<PredConcat<OtherPredicates,
+                                                       SubtargetPredicate>.ret,
+                                            AssemblerPredicate>.ret,
+                                 WaveSizePredicate>.ret;
 }
+
 class AMDGPUPat<dag pattern, dag result> : Pat<pattern, result>,
       PredicateControl;
 
diff --git a/llvm/lib/Target/AMDGPU/DSInstructions.td b/llvm/lib/Target/AMDGPU/DSInstructions.td
--- a/llvm/lib/Target/AMDGPU/DSInstructions.td
+++ b/llvm/lib/Target/AMDGPU/DSInstructions.td
@@ -1075,7 +1075,7 @@
 class DS_Real_vi <bits<8> op, DS_Pseudo ds> :
   DS_Real <ds>,
   SIMCInstr <ds.Mnemonic, SIEncodingFamily.VI> {
-  let AssemblerPredicates = [isGFX8GFX9];
+  let AssemblerPredicate = isGFX8GFX9;
   let DecoderNamespace = "GFX8";
 
   // encoding
diff --git a/llvm/lib/Target/AMDGPU/MIMGInstructions.td b/llvm/lib/Target/AMDGPU/MIMGInstructions.td
--- a/llvm/lib/Target/AMDGPU/MIMGInstructions.td
+++ b/llvm/lib/Target/AMDGPU/MIMGInstructions.td
@@ -183,7 +183,7 @@
 class MIMG_gfx6789<bits<8> op, dag outs, string dns = "">
   : MIMG<outs, dns>, MIMGe_gfx6789<op> {
   let SubtargetPredicate = isGFX6GFX7GFX8GFX9;
-  let AssemblerPredicates = [isGFX6GFX7GFX8GFX9];
+  let AssemblerPredicate = isGFX6GFX7GFX8GFX9;
 
   let MIMGEncoding = MIMGEncGfx6;
 
@@ -194,7 +194,7 @@
 class MIMG_gfx10<int op, dag outs, string dns = "">
   : MIMG<outs, dns>, MIMGe_gfx10<op> {
   let SubtargetPredicate = isGFX10Plus;
-  let AssemblerPredicates = [isGFX10Plus];
+  let AssemblerPredicate = isGFX10Plus;
 
   let MIMGEncoding = MIMGEncGfx10Default;
 
@@ -207,7 +207,7 @@
 class MIMG_nsa_gfx10<int op, dag outs, int num_addrs, string dns="">
   : MIMG<outs, dns>, MIMGe_gfx10<op> {
   let SubtargetPredicate = isGFX10Plus;
-  let AssemblerPredicates = [isGFX10Plus];
+  let AssemblerPredicate = isGFX10Plus;
 
   let MIMGEncoding = MIMGEncGfx10NSA;
 
@@ -416,13 +416,13 @@
                      RegisterClass addr_rc, bit enableDasm = 0>
   : MIMG_Atomic_gfx6789_base<op.SI_GFX10, asm, data_rc, addr_rc,
                              !if(enableDasm, "GFX6GFX7", "")> {
-  let AssemblerPredicates = [isGFX6GFX7];
+  let AssemblerPredicate = isGFX6GFX7;
 }
 
 class MIMG_Atomic_vi<mimg op, string asm, RegisterClass data_rc,
                      RegisterClass addr_rc, bit enableDasm = 0>
   : MIMG_Atomic_gfx6789_base<op.VI, asm, data_rc, addr_rc, !if(enableDasm, "GFX8", "")> {
-  let AssemblerPredicates = [isGFX8GFX9];
+  let AssemblerPredicate = isGFX8GFX9;
   let MIMGEncoding = MIMGEncGfx8;
 }
 
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.td b/llvm/lib/Target/AMDGPU/SIInstrInfo.td
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.td
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.td
@@ -1381,7 +1381,7 @@
       def _si : EXP_Helper<done>,
                 SIMCInstr <"exp"#!if(done, "_done", ""), SIEncodingFamily.SI>,
                 EXPe {
-        let AssemblerPredicates = [isGFX6GFX7];
+        let AssemblerPredicate = isGFX6GFX7;
         let DecoderNamespace = "GFX6GFX7";
         let DisableDecoder = DisableSIDecoder;
       }
@@ -1389,7 +1389,7 @@
       def _vi : EXP_Helper<done>,
                 SIMCInstr <"exp"#!if(done, "_done", ""), SIEncodingFamily.VI>,
                 EXPe_vi {
-        let AssemblerPredicates = [isGFX8GFX9];
+        let AssemblerPredicate = isGFX8GFX9;
         let DecoderNamespace = "GFX8";
         let DisableDecoder = DisableVIDecoder;
       }
@@ -1397,7 +1397,7 @@
       def _gfx10 : EXP_Helper<done>,
                 SIMCInstr <"exp"#!if(done, "_done", ""), SIEncodingFamily.GFX10>,
                 EXPe {
-        let AssemblerPredicates = [isGFX10Plus];
+        let AssemblerPredicate = isGFX10Plus;
         let DecoderNamespace = "GFX10";
         let DisableDecoder = DisableSIDecoder;
       }
diff --git a/llvm/lib/Target/AMDGPU/SMInstructions.td b/llvm/lib/Target/AMDGPU/SMInstructions.td
--- a/llvm/lib/Target/AMDGPU/SMInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SMInstructions.td
@@ -417,7 +417,7 @@
   , SIMCInstr<ps.PseudoInstr, SIEncodingFamily.SI>
   , Enc32 {
 
-  let AssemblerPredicates = [isGFX6GFX7];
+  let AssemblerPredicate = isGFX6GFX7;
   let DecoderNamespace = "GFX6GFX7";
 
   let Inst{7-0}   = !if(ps.has_offset, offset{7-0}, ?);
@@ -471,7 +471,7 @@
   , Enc64 {
   bit glc;
 
-  let AssemblerPredicates = [isGFX8GFX9];
+  let AssemblerPredicate = isGFX8GFX9;
   let DecoderNamespace = "GFX8";
 
   let Inst{5-0}   = !if(ps.has_sbase, sbase{6-1}, ?);
@@ -660,7 +660,7 @@
   SM_Real<ps>,
   Enc64 {
 
-  let AssemblerPredicates = [isGFX7Only];
+  let AssemblerPredicate = isGFX7Only;
   let DecoderNamespace = "GFX7";
   let InOperandList = (ins ps.BaseClass:$sbase, smrd_literal_offset:$offset, GLC:$glc, DLC:$dlc);
 
@@ -697,7 +697,7 @@
   , SIMCInstr<ps.PseudoInstr, SIEncodingFamily.SI>
   , Enc32 {
 
-  let AssemblerPredicates = [isGFX7Only];
+  let AssemblerPredicate = isGFX7Only;
   let DecoderNamespace = "GFX7";
 
   let Inst{7-0}   = !if(ps.has_offset, offset{7-0}, ?);
@@ -835,7 +835,7 @@
   bit glc;
   bit dlc;
 
-  let AssemblerPredicates = [isGFX10Plus];
+  let AssemblerPredicate = isGFX10Plus;
   let DecoderNamespace = "GFX10";
 
   let Inst{5-0}   = !if(ps.has_sbase, sbase{6-1}, ?);
diff --git a/llvm/lib/Target/AMDGPU/SOPInstructions.td b/llvm/lib/Target/AMDGPU/SOPInstructions.td
--- a/llvm/lib/Target/AMDGPU/SOPInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SOPInstructions.td
@@ -1503,7 +1503,7 @@
 
 class Select_vi<string opName> :
   SIMCInstr<opName, SIEncodingFamily.VI> {
-  list<Predicate> AssemblerPredicates = [isGFX8GFX9];
+  Predicate AssemblerPredicate = isGFX8GFX9;
   string DecoderNamespace = "GFX8";
 }
 
diff --git a/llvm/lib/Target/AMDGPU/VOP1Instructions.td b/llvm/lib/Target/AMDGPU/VOP1Instructions.td
--- a/llvm/lib/Target/AMDGPU/VOP1Instructions.td
+++ b/llvm/lib/Target/AMDGPU/VOP1Instructions.td
@@ -699,7 +699,7 @@
 }
 
 multiclass VOP1Only_Real_vi <bits<10> op> {
-  let AssemblerPredicates = [isGFX8GFX9], DecoderNamespace = "GFX8" in {
+  let AssemblerPredicate = isGFX8GFX9, DecoderNamespace = "GFX8" in {
     def _vi :
       VOP1_Real<!cast<VOP1_Pseudo>(NAME), SIEncodingFamily.VI>,
       VOP1e<op{7-0}, !cast<VOP1_Pseudo>(NAME).Pfl>;
@@ -707,7 +707,7 @@
 }
 
 multiclass VOP1_Real_e32e64_vi <bits<10> op> {
-  let AssemblerPredicates = [isGFX8GFX9], DecoderNamespace = "GFX8" in {
+  let AssemblerPredicate = isGFX8GFX9, DecoderNamespace = "GFX8" in {
     def _e32_vi :
       VOP1_Real<!cast<VOP1_Pseudo>(NAME#"_e32"), SIEncodingFamily.VI>,
       VOP1e<op{7-0}, !cast<VOP1_Pseudo>(NAME#"_e32").Pfl>;
@@ -899,7 +899,7 @@
 //===----------------------------------------------------------------------===//
 
 multiclass VOP1_Real_gfx9 <bits<10> op> {
-  let AssemblerPredicates = [isGFX9Only], DecoderNamespace = "GFX9" in {
+  let AssemblerPredicate = isGFX9Only, DecoderNamespace = "GFX9" in {
     defm NAME : VOP1_Real_e32e64_vi <op>;
   }
 
diff --git a/llvm/lib/Target/AMDGPU/VOP2Instructions.td b/llvm/lib/Target/AMDGPU/VOP2Instructions.td
--- a/llvm/lib/Target/AMDGPU/VOP2Instructions.td
+++ b/llvm/lib/Target/AMDGPU/VOP2Instructions.td
@@ -1282,7 +1282,7 @@
 // GFX8, GFX9 (VI).
 //===----------------------------------------------------------------------===//
 
-let AssemblerPredicates = [isGFX8GFX9], DecoderNamespace = "GFX8" in {
+let AssemblerPredicate = isGFX8GFX9, DecoderNamespace = "GFX8" in {
 
 multiclass VOP2_Real_MADK_vi <bits<6> op> {
   def _vi : VOP2_Real<!cast<VOP2_Pseudo>(NAME), SIEncodingFamily.VI>,
@@ -1316,7 +1316,7 @@
   VOP2_Real_e32_vi<op>,
   VOP2_Real_e64_vi<{0, 1, 0, 0, op{5-0}}>;
 
-} // End AssemblerPredicates = [isGFX8GFX9], DecoderNamespace = "GFX8"
+} // End AssemblerPredicate = isGFX8GFX9, DecoderNamespace = "GFX8"
 
 multiclass VOP2_SDWA_Real <bits<6> op> {
   foreach _ = BoolToList<!cast<VOP2_Pseudo>(NAME#"_e32").Pfl.HasExtSDWA>.ret in
@@ -1332,7 +1332,7 @@
     VOP2_SDWA9Ae <op{5-0}, !cast<VOP2_SDWA_Pseudo>(NAME#"_sdwa").Pfl>;
 }
 
-let AssemblerPredicates = [isGFX8Only] in {
+let AssemblerPredicate = isGFX8Only in {
 
 multiclass VOP2be_Real_e32e64_vi_only <bits<6> op, string OpName, string AsmName> {
   def _e32_vi :
@@ -1366,7 +1366,7 @@
 }
 }
 
-let AssemblerPredicates = [isGFX9Only] in {
+let AssemblerPredicate = isGFX9Only in {
 
 multiclass VOP2be_Real_e32e64_gfx9 <bits<6> op, string OpName, string AsmName> {
   def _e32_gfx9 :
@@ -1424,7 +1424,7 @@
       }
 }
 
-} // AssemblerPredicates = [isGFX9Only]
+} // AssemblerPredicate = isGFX9Only
 
 multiclass VOP2_Real_e32e64_vi <bits<6> op> :
   Base_VOP2_Real_e32e64_vi<op>, VOP2_SDWA_Real<op>, VOP2_SDWA9_Real<op> {
diff --git a/llvm/lib/Target/AMDGPU/VOP3Instructions.td b/llvm/lib/Target/AMDGPU/VOP3Instructions.td
--- a/llvm/lib/Target/AMDGPU/VOP3Instructions.td
+++ b/llvm/lib/Target/AMDGPU/VOP3Instructions.td
@@ -927,7 +927,7 @@
 // GFX8, GFX9 (VI).
 //===----------------------------------------------------------------------===//
 
-let AssemblerPredicates = [isGFX8GFX9], DecoderNamespace = "GFX8" in {
+let AssemblerPredicate = isGFX8GFX9, DecoderNamespace = "GFX8" in {
 
 multiclass VOP3_Real_vi<bits<10> op> {
   def _vi : VOP3_Real<!cast<VOP_Pseudo>(NAME), SIEncodingFamily.VI>,
@@ -949,9 +949,9 @@
             VOP3Interp_vi <op, !cast<VOP_Pseudo>(NAME).Pfl>;
 }
 
-} // End AssemblerPredicates = [isGFX8GFX9], DecoderNamespace = "GFX8"
+} // End AssemblerPredicate = isGFX8GFX9, DecoderNamespace = "GFX8"
 
-let AssemblerPredicates = [isGFX8Only], DecoderNamespace = "GFX8" in {
+let AssemblerPredicate = isGFX8Only, DecoderNamespace = "GFX8" in {
 
 multiclass VOP3_F16_Real_vi<bits<10> op> {
   def _vi : VOP3_Real<!cast<VOP3_Pseudo>(NAME), SIEncodingFamily.VI>,
@@ -963,9 +963,9 @@
             VOP3Interp_vi <op, !cast<VOP3_Pseudo>(NAME).Pfl>;
 }
 
-} // End AssemblerPredicates = [isGFX8Only], DecoderNamespace = "GFX8"
+} // End AssemblerPredicate = isGFX8Only, DecoderNamespace = "GFX8"
 
-let AssemblerPredicates = [isGFX9Only], DecoderNamespace = "GFX9" in {
+let AssemblerPredicate = isGFX9Only, DecoderNamespace = "GFX9" in {
 
 multiclass VOP3_F16_Real_gfx9<bits<10> op, string OpName, string AsmName> {
   def _gfx9 : VOP3_Real<!cast<VOP3_Pseudo>(OpName), SIEncodingFamily.GFX9>,
@@ -999,7 +999,7 @@
             }
 }
 
-} // End AssemblerPredicates = [isGFX9Only], DecoderNamespace = "GFX9"
+} // End AssemblerPredicate = isGFX9Only, DecoderNamespace = "GFX9"
 
 defm V_MAD_U64_U32      : VOP3be_Real_vi <0x1E8>;
 defm V_MAD_I64_I32      : VOP3be_Real_vi <0x1E9>;
diff --git a/llvm/lib/Target/AMDGPU/VOP3PInstructions.td b/llvm/lib/Target/AMDGPU/VOP3PInstructions.td
--- a/llvm/lib/Target/AMDGPU/VOP3PInstructions.td
+++ b/llvm/lib/Target/AMDGPU/VOP3PInstructions.td
@@ -404,7 +404,7 @@
 multiclass VOP3P_Real_vi<bits<10> op> {
   def _vi : VOP3P_Real<!cast<VOP3_Pseudo>(NAME), SIEncodingFamily.VI>,
             VOP3Pe <op, !cast<VOP3_Pseudo>(NAME).Pfl> {
-    let AssemblerPredicates = [HasVOP3PInsts];
+    let AssemblerPredicate = HasVOP3PInsts;
     let DecoderNamespace = "GFX8";
   }
 }
@@ -412,7 +412,7 @@
 multiclass VOP3P_Real_MAI<bits<10> op> {
   def _vi : VOP3P_Real<!cast<VOP3_Pseudo>(NAME), SIEncodingFamily.VI>,
             VOP3Pe_MAI <op, !cast<VOP3_Pseudo>(NAME).Pfl> {
-    let AssemblerPredicates = [HasMAIInsts];
+    let AssemblerPredicate = HasMAIInsts;
     let DecoderNamespace = "GFX8";
   }
 }
diff --git a/llvm/lib/Target/AMDGPU/VOPCInstructions.td b/llvm/lib/Target/AMDGPU/VOPCInstructions.td
--- a/llvm/lib/Target/AMDGPU/VOPCInstructions.td
+++ b/llvm/lib/Target/AMDGPU/VOPCInstructions.td
@@ -1218,7 +1218,7 @@
 //===----------------------------------------------------------------------===//
 
 multiclass VOPC_Real_vi <bits<10> op> {
-  let AssemblerPredicates = [isGFX8GFX9], DecoderNamespace = "GFX8" in {
+  let AssemblerPredicate = isGFX8GFX9, DecoderNamespace = "GFX8" in {
     def _e32_vi :
       VOPC_Real<!cast<VOPC_Pseudo>(NAME#"_e32"), SIEncodingFamily.VI>,
       VOPCe<op{7-0}>;