Index: lib/Target/AMDGPU/AMDGPURegisterInfo.h
===================================================================
--- lib/Target/AMDGPU/AMDGPURegisterInfo.h
+++ lib/Target/AMDGPU/AMDGPURegisterInfo.h
@@ -31,7 +31,7 @@
 
   /// \returns the sub reg enum value for the given \p Channel
   /// (e.g. getSubRegFromChannel(0) -> AMDGPU::sub0)
-  unsigned getSubRegFromChannel(unsigned Channel) const;
+  static unsigned getSubRegFromChannel(unsigned Channel);
 
   void reserveRegisterTuples(BitVector &, unsigned Reg) const;
 };
Index: lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
+++ lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
@@ -27,7 +27,7 @@
 // they are not supported at this time.
 //===----------------------------------------------------------------------===//
 
-unsigned AMDGPURegisterInfo::getSubRegFromChannel(unsigned Channel) const {
+unsigned AMDGPURegisterInfo::getSubRegFromChannel(unsigned Channel) {
   static const unsigned SubRegs[] = {
     AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3, AMDGPU::sub4,
     AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7, AMDGPU::sub8, AMDGPU::sub9,
Index: lib/Target/AMDGPU/R600ControlFlowFinalizer.cpp
===================================================================
--- lib/Target/AMDGPU/R600ControlFlowFinalizer.cpp
+++ lib/Target/AMDGPU/R600ControlFlowFinalizer.cpp
@@ -309,7 +309,7 @@
           DstMI = Reg;
         else
           DstMI = TRI->getMatchingSuperReg(Reg,
-              TRI->getSubRegFromChannel(TRI->getHWRegChan(Reg)),
+              AMDGPURegisterInfo::getSubRegFromChannel(TRI->getHWRegChan(Reg)),
               &AMDGPU::R600_Reg128RegClass);
       }
       if (MO.isUse()) {
@@ -318,7 +318,7 @@
           SrcMI = Reg;
         else
           SrcMI = TRI->getMatchingSuperReg(Reg,
-              TRI->getSubRegFromChannel(TRI->getHWRegChan(Reg)),
+              AMDGPURegisterInfo::getSubRegFromChannel(TRI->getHWRegChan(Reg)),
               &AMDGPU::R600_Reg128RegClass);
       }
     }
Index: lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp
===================================================================
--- lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp
+++ lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp
@@ -219,13 +219,13 @@
           }
         }
         if (IsReduction) {
-          unsigned SubRegIndex = TRI.getSubRegFromChannel(Chan);
+          unsigned SubRegIndex = AMDGPURegisterInfo::getSubRegFromChannel(Chan);
           Src0 = TRI.getSubReg(Src0, SubRegIndex);
           Src1 = TRI.getSubReg(Src1, SubRegIndex);
         } else if (IsCube) {
           static const int CubeSrcSwz[] = {2, 2, 0, 1};
-          unsigned SubRegIndex0 = TRI.getSubRegFromChannel(CubeSrcSwz[Chan]);
-          unsigned SubRegIndex1 = TRI.getSubRegFromChannel(CubeSrcSwz[3 - Chan]);
+          unsigned SubRegIndex0 = AMDGPURegisterInfo::getSubRegFromChannel(CubeSrcSwz[Chan]);
+          unsigned SubRegIndex1 = AMDGPURegisterInfo::getSubRegFromChannel(CubeSrcSwz[3 - Chan]);
           Src1 = TRI.getSubReg(Src0, SubRegIndex1);
           Src0 = TRI.getSubReg(Src0, SubRegIndex0);
         }
@@ -234,7 +234,7 @@
         bool Mask = false;
         bool NotLast = true;
         if (IsCube) {
-          unsigned SubRegIndex = TRI.getSubRegFromChannel(Chan);
+          unsigned SubRegIndex = AMDGPURegisterInfo::getSubRegFromChannel(Chan);
           DstReg = TRI.getSubReg(DstReg, SubRegIndex);
         } else {
           // Mask the write if the original instruction does not write to
Index: lib/Target/AMDGPU/R600InstrInfo.cpp
===================================================================
--- lib/Target/AMDGPU/R600InstrInfo.cpp
+++ lib/Target/AMDGPU/R600InstrInfo.cpp
@@ -73,7 +73,7 @@
 
   if (VectorComponents > 0) {
     for (unsigned I = 0; I < VectorComponents; I++) {
-      unsigned SubRegIndex = RI.getSubRegFromChannel(I);
+      unsigned SubRegIndex = AMDGPURegisterInfo::getSubRegFromChannel(I);
       buildDefaultInstruction(MBB, MI, AMDGPU::MOV,
                               RI.getSubReg(DestReg, SubRegIndex),
                               RI.getSubReg(SrcReg, SubRegIndex))