diff --git a/lib/Target/AMDGPU/AMDGPU.td b/lib/Target/AMDGPU/AMDGPU.td
index 761668b..c67d203 100644
--- a/lib/Target/AMDGPU/AMDGPU.td
+++ b/lib/Target/AMDGPU/AMDGPU.td
@@ -474,47 +474,50 @@
   Implies
 >;
 
-def FeatureISAVersion6_0_0 : SubtargetFeatureISAVersion <6,0,0,
-  [FeatureSouthernIslands,
+class FeatureSet<list<SubtargetFeature> Features_> {
+  list<SubtargetFeature> Features = Features_;
+}
+
+def FeatureISAVersion6_0_0 : FeatureSet<[FeatureSouthernIslands,
    FeatureFastFMAF32,
    HalfRate64Ops,
    FeatureLDSBankCount32,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion6_0_1 : SubtargetFeatureISAVersion <6,0,1,
+def FeatureISAVersion6_0_1 : FeatureSet<
   [FeatureSouthernIslands,
    FeatureLDSBankCount32,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion7_0_0 : SubtargetFeatureISAVersion <7,0,0,
+def FeatureISAVersion7_0_0 : FeatureSet<
   [FeatureSeaIslands,
    FeatureLDSBankCount32,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion7_0_1 : SubtargetFeatureISAVersion <7,0,1,
+def FeatureISAVersion7_0_1 : FeatureSet<
   [FeatureSeaIslands,
    HalfRate64Ops,
    FeatureLDSBankCount32,
    FeatureFastFMAF32,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion7_0_2 : SubtargetFeatureISAVersion <7,0,2,
+def FeatureISAVersion7_0_2 : FeatureSet<
   [FeatureSeaIslands,
    FeatureLDSBankCount16,
    FeatureFastFMAF32,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion7_0_3 : SubtargetFeatureISAVersion <7,0,3,
+def FeatureISAVersion7_0_3 : FeatureSet<
   [FeatureSeaIslands,
    FeatureLDSBankCount16,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion7_0_4 : SubtargetFeatureISAVersion <7,0,4,
+def FeatureISAVersion7_0_4 : FeatureSet<
   [FeatureSeaIslands,
    FeatureLDSBankCount32,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion8_0_1 : SubtargetFeatureISAVersion <8,0,1,
+def FeatureISAVersion8_0_1 : FeatureSet<
   [FeatureVolcanicIslands,
    FeatureFastFMAF32,
    HalfRate64Ops,
@@ -523,45 +526,45 @@
    FeatureUnpackedD16VMem,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion8_0_2 : SubtargetFeatureISAVersion <8,0,2,
+def FeatureISAVersion8_0_2 : FeatureSet<
   [FeatureVolcanicIslands,
    FeatureLDSBankCount32,
    FeatureSGPRInitBug,
    FeatureUnpackedD16VMem,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion8_0_3 : SubtargetFeatureISAVersion <8,0,3,
+def FeatureISAVersion8_0_3 : FeatureSet<
   [FeatureVolcanicIslands,
    FeatureLDSBankCount32,
    FeatureUnpackedD16VMem,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion8_1_0 : SubtargetFeatureISAVersion <8,1,0,
+def FeatureISAVersion8_1_0 : FeatureSet<
   [FeatureVolcanicIslands,
    FeatureLDSBankCount16,
    FeatureXNACK,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion9_0_0 : SubtargetFeatureISAVersion <9,0,0,
+def FeatureISAVersion9_0_0 : FeatureSet<
   [FeatureGFX9,
    FeatureMadMixInsts,
    FeatureLDSBankCount32,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion9_0_2 : SubtargetFeatureISAVersion <9,0,2,
+def FeatureISAVersion9_0_2 : FeatureSet<
   [FeatureGFX9,
    FeatureMadMixInsts,
    FeatureLDSBankCount32,
    FeatureXNACK,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion9_0_4 : SubtargetFeatureISAVersion <9,0,4,
+def FeatureISAVersion9_0_4 : FeatureSet<
   [FeatureGFX9,
    FeatureLDSBankCount32,
    FeatureFmaMixInsts,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion9_0_6 : SubtargetFeatureISAVersion <9,0,6,
+def FeatureISAVersion9_0_6 : FeatureSet<
   [FeatureGFX9,
    HalfRate64Ops,
    FeatureFmaMixInsts,
@@ -571,7 +574,7 @@
    FeatureSRAMECC,
    FeatureCodeObjectV3]>;
 
-def FeatureISAVersion9_0_9 : SubtargetFeatureISAVersion <9,0,9,
+def FeatureISAVersion9_0_9 : FeatureSet<
   [FeatureGFX9,
    FeatureMadMixInsts,
    FeatureLDSBankCount32,
diff --git a/lib/Target/AMDGPU/AMDGPUSubtarget.cpp b/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
index dda0fe7..c08d1aa 100644
--- a/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
+++ b/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
@@ -156,7 +156,6 @@
     AMDGPUSubtarget(TT),
     TargetTriple(TT),
     Gen(SOUTHERN_ISLANDS),
-    IsaVersion(ISAVersion0_0_0),
     InstrItins(getInstrItineraryForCPU(GPU)),
     LDSBankCount(0),
     MaxPrivateElementSize(0),
diff --git a/lib/Target/AMDGPU/AMDGPUSubtarget.h b/lib/Target/AMDGPU/AMDGPUSubtarget.h
index 06d750d..5bc14f6 100644
--- a/lib/Target/AMDGPU/AMDGPUSubtarget.h
+++ b/lib/Target/AMDGPU/AMDGPUSubtarget.h
@@ -245,26 +245,6 @@
 class GCNSubtarget : public AMDGPUGenSubtargetInfo,
                      public AMDGPUSubtarget {
 public:
-  enum {
-    ISAVersion0_0_0,
-    ISAVersion6_0_0,
-    ISAVersion6_0_1,
-    ISAVersion7_0_0,
-    ISAVersion7_0_1,
-    ISAVersion7_0_2,
-    ISAVersion7_0_3,
-    ISAVersion7_0_4,
-    ISAVersion8_0_1,
-    ISAVersion8_0_2,
-    ISAVersion8_0_3,
-    ISAVersion8_1_0,
-    ISAVersion9_0_0,
-    ISAVersion9_0_2,
-    ISAVersion9_0_4,
-    ISAVersion9_0_6,
-    ISAVersion9_0_9,
-  };
-
   enum TrapHandlerAbi {
     TrapHandlerAbiNone = 0,
     TrapHandlerAbiHsa = 1
@@ -296,7 +276,6 @@
   // Basic subtarget description.
   Triple TargetTriple;
   unsigned Gen;
-  unsigned IsaVersion;
   InstrItineraryData InstrItins;
   int LDSBankCount;
   unsigned MaxPrivateElementSize;
diff --git a/lib/Target/AMDGPU/GCNProcessors.td b/lib/Target/AMDGPU/GCNProcessors.td
index dbd955b..a8da2ad 100644
--- a/lib/Target/AMDGPU/GCNProcessors.td
+++ b/lib/Target/AMDGPU/GCNProcessors.td
@@ -12,151 +12,159 @@
   [FeatureWavefrontSize64]
 >;
 
-//===----------------------------------------------------------------------===//
+//===------------------------------------------------------------===//
 // GCN GFX6 (Southern Islands (SI)).
-//===----------------------------------------------------------------------===//
+//===------------------------------------------------------------===//
 
 def : ProcessorModel<"gfx600", SIFullSpeedModel,
-  [FeatureISAVersion6_0_0]
+  FeatureISAVersion6_0_0.Features
 >;
 
 def : ProcessorModel<"tahiti", SIFullSpeedModel,
-  [FeatureISAVersion6_0_0]
+  FeatureISAVersion6_0_0.Features
 >;
 
 def : ProcessorModel<"gfx601", SIQuarterSpeedModel,
-  [FeatureISAVersion6_0_1]
+  FeatureISAVersion6_0_1.Features
 >;
 
 def : ProcessorModel<"hainan", SIQuarterSpeedModel,
-  [FeatureISAVersion6_0_1]
+  FeatureISAVersion6_0_1.Features
 >;
 
 def : ProcessorModel<"oland", SIQuarterSpeedModel,
-  [FeatureISAVersion6_0_1]
+  FeatureISAVersion6_0_1.Features
 >;
 
 def : ProcessorModel<"pitcairn", SIQuarterSpeedModel,
-  [FeatureISAVersion6_0_1]
+  FeatureISAVersion6_0_1.Features
 >;
 
 def : ProcessorModel<"verde", SIQuarterSpeedModel,
-  [FeatureISAVersion6_0_1]
+  FeatureISAVersion6_0_1.Features
 >;
 
-//===----------------------------------------------------------------------===//
+//===------------------------------------------------------------===//
 // GCN GFX7 (Sea Islands (CI)).
-//===----------------------------------------------------------------------===//
+//===------------------------------------------------------------===//
 
 def : ProcessorModel<"gfx700", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_0]
+  FeatureISAVersion7_0_0.Features
 >;
 
 def : ProcessorModel<"kaveri", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_0]
+  FeatureISAVersion7_0_0.Features
 >;
 
 def : ProcessorModel<"gfx701", SIFullSpeedModel,
-  [FeatureISAVersion7_0_1]
+  FeatureISAVersion7_0_1.Features
 >;
 
 def : ProcessorModel<"hawaii", SIFullSpeedModel,
-  [FeatureISAVersion7_0_1]
+  FeatureISAVersion7_0_1.Features
 >;
 
 def : ProcessorModel<"gfx702", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_2]
+  FeatureISAVersion7_0_2.Features
 >;
 
 def : ProcessorModel<"gfx703", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_3]
+  FeatureISAVersion7_0_3.Features
 >;
 
 def : ProcessorModel<"kabini", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_3]
+  FeatureISAVersion7_0_3.Features
 >;
 
 def : ProcessorModel<"mullins", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_3]
+  FeatureISAVersion7_0_3.Features
 >;
 
 def : ProcessorModel<"gfx704", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_4]
+  FeatureISAVersion7_0_4.Features
 >;
 
 def : ProcessorModel<"bonaire", SIQuarterSpeedModel,
-  [FeatureISAVersion7_0_4]
+  FeatureISAVersion7_0_4.Features
 >;
 
-//===----------------------------------------------------------------------===//
+//===------------------------------------------------------------===//
 // GCN GFX8 (Volcanic Islands (VI)).
-//===----------------------------------------------------------------------===//
+//===------------------------------------------------------------===//
 
 def : ProcessorModel<"gfx801", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_1]
+  FeatureISAVersion8_0_1.Features
 >;
 
 def : ProcessorModel<"carrizo", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_1]
+  FeatureISAVersion8_0_1.Features
 >;
 
 def : ProcessorModel<"gfx802", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_2]
+  FeatureISAVersion8_0_2.Features
 >;
 
 def : ProcessorModel<"iceland", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_2]
+  FeatureISAVersion8_0_2.Features
 >;
 
 def : ProcessorModel<"tonga", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_2]
+  FeatureISAVersion8_0_2.Features
 >;
 
 def : ProcessorModel<"gfx803", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_3]
+  FeatureISAVersion8_0_3.Features
 >;
 
 def : ProcessorModel<"fiji", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_3]
+  FeatureISAVersion8_0_3.Features
 >;
 
 def : ProcessorModel<"polaris10", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_3]
+  FeatureISAVersion8_0_3.Features
 >;
 
 def : ProcessorModel<"polaris11", SIQuarterSpeedModel,
-  [FeatureISAVersion8_0_3]
+  FeatureISAVersion8_0_3.Features
 >;
 
 def : ProcessorModel<"gfx810", SIQuarterSpeedModel,
-  [FeatureISAVersion8_1_0]
+  FeatureISAVersion8_1_0.Features
 >;
 
 def : ProcessorModel<"stoney", SIQuarterSpeedModel,
-  [FeatureISAVersion8_1_0]
+  FeatureISAVersion8_1_0.Features
 >;
 
-//===----------------------------------------------------------------------===//
+//===-------------------------------------------------------------===//
 // GCN GFX9.
-//===----------------------------------------------------------------------===//
+//===-------------------------------------------------------------===//
 
 def : ProcessorModel<"gfx900", SIQuarterSpeedModel,
-  [FeatureISAVersion9_0_0]
+  FeatureISAVersion9_0_0.Features
+>;
+
+//===------------------------------------------------------------===//
+// GCN GFX9.
+//===------------------------------------------------------------===//
+
+def : ProcessorModel<"gfx900", SIQuarterSpeedModel,
+  FeatureISAVersion9_0_0.Features
 >;
 
 def : ProcessorModel<"gfx902", SIQuarterSpeedModel,
-  [FeatureISAVersion9_0_2]
+  FeatureISAVersion9_0_2.Features
 >;
 
 def : ProcessorModel<"gfx904", SIQuarterSpeedModel,
-  [FeatureISAVersion9_0_4]
+  FeatureISAVersion9_0_4.Features
 >;
 
 def : ProcessorModel<"gfx906", SIQuarterSpeedModel,
-  [FeatureISAVersion9_0_6]
+  FeatureISAVersion9_0_6.Features
 >;
 
 def : ProcessorModel<"gfx909", SIQuarterSpeedModel,
-  [FeatureISAVersion9_0_9]
+  FeatureISAVersion9_0_9.Features
 >;