diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp
--- a/llvm/lib/CodeGen/MachineCopyPropagation.cpp
+++ b/llvm/lib/CodeGen/MachineCopyPropagation.cpp
@@ -414,6 +414,31 @@
   if (!UseI.isCopy())
     return false;
 
+  const TargetRegisterClass *CopySrcRC =
+      TRI->getMinimalPhysRegClass(CopySrcReg);
+  const TargetRegisterClass *UseDstRC =
+      TRI->getMinimalPhysRegClass(UseI.getOperand(0).getReg());
+  const TargetRegisterClass *CrossCopyRC = TRI->getCrossCopyRegClass(CopySrcRC);
+
+  // If cross copy register class is not the same as copy source register class
+  // then it is not possible to copy the register directly and requires a cross
+  // register class copy. Fowarding this copy without checking register class of
+  // UseDst may create additional cross register copies when expanding the copy
+  // instruction in later passes.
+  if (CopySrcRC != CrossCopyRC) {
+    const TargetRegisterClass *CopyDstRC =
+        TRI->getMinimalPhysRegClass(Copy.getOperand(0).getReg());
+
+    // Check if UseDstRC matches the necessary register class to copy from
+    // CopySrc's register class. If so then forwarding the copy will not
+    // introduce any cross-class copys. Else if CopyDstRC matches then keep the
+    // copy and do not forward. If neither UseDstRC or CopyDstRC matches then
+    // we may need a cross register copy later but we do not worry about it
+    // here.
+    if (UseDstRC != CrossCopyRC && CopyDstRC == CrossCopyRC)
+      return false;
+  }
+
   /// COPYs don't have register class constraints, so if the user instruction
   /// is a COPY, we just try to avoid introducing additional cross-class
   /// COPYs.  For example:
@@ -430,9 +455,6 @@
   ///
   /// so we have reduced the number of cross-class COPYs and potentially
   /// introduced a nop COPY that can be removed.
-  const TargetRegisterClass *UseDstRC =
-      TRI->getMinimalPhysRegClass(UseI.getOperand(0).getReg());
-
   const TargetRegisterClass *SuperRC = UseDstRC;
   for (TargetRegisterClass::sc_iterator SuperRCI = UseDstRC->getSuperClasses();
        SuperRC; SuperRC = *SuperRCI++)
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
@@ -108,6 +108,13 @@
   const TargetRegisterClass *getPointerRegClass(
     const MachineFunction &MF, unsigned Kind = 0) const override;
 
+  /// Returns a legal register class to copy a register in the specified class
+  /// to or from. If it is possible to copy the register directly without using
+  /// a cross register class copy, return the specified RC. Returns NULL if it
+  /// is not possible to copy between two registers of the specified class.
+  const TargetRegisterClass *
+  getCrossCopyRegClass(const TargetRegisterClass *RC) const override;
+
   void buildVGPRSpillLoadStore(SGPRSpillBuilder &SB, int Index, int Offset,
                                bool IsLoad, bool IsKill = true) const;
 
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -801,6 +801,14 @@
   return &AMDGPU::VGPR_32RegClass;
 }
 
+const TargetRegisterClass *
+SIRegisterInfo::getCrossCopyRegClass(const TargetRegisterClass *RC) const {
+  if (isAGPRClass(RC) && !ST.hasGFX90AInsts())
+    return getEquivalentVGPRClass(RC);
+
+  return RC;
+}
+
 static unsigned getNumSubRegsForSpillOp(unsigned Op) {
 
   switch (Op) {
diff --git a/llvm/test/CodeGen/AMDGPU/agpr-copy-propagation.mir b/llvm/test/CodeGen/AMDGPU/agpr-copy-propagation.mir
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/agpr-copy-propagation.mir
@@ -0,0 +1,70 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=amdgcn -mcpu=gfx908 %s -o - -run-pass machine-cp -verify-machineinstrs | FileCheck -check-prefix=GFX908 %s
+# RUN: llc -march=amdgcn -mcpu=gfx90a %s -o - -run-pass machine-cp -verify-machineinstrs | FileCheck -check-prefix=GFX90A %s
+
+---
+name:  do_not_propagate_agpr_to_agpr
+body: |
+  bb.0:
+    successors:
+    liveins: $agpr0
+
+    ; GFX908-LABEL: name: do_not_propagate_agpr_to_agpr
+    ; GFX908: renamable $vgpr0 = COPY renamable $agpr0, implicit $exec
+    ; GFX908: renamable $agpr1 = COPY renamable $vgpr0, implicit $exec
+    ; GFX908: renamable $agpr2 = COPY renamable $vgpr0, implicit $exec
+    ; GFX908: S_ENDPGM 0, implicit $vgpr0, implicit $agpr1, implicit $agpr2
+    ; GFX90A-LABEL: name: do_not_propagate_agpr_to_agpr
+    ; GFX90A: renamable $vgpr0 = COPY renamable $agpr0, implicit $exec
+    ; GFX90A: renamable $agpr1 = COPY $agpr0, implicit $exec
+    ; GFX90A: renamable $agpr2 = COPY $agpr0, implicit $exec
+    ; GFX90A: S_ENDPGM 0, implicit $vgpr0, implicit $agpr1, implicit $agpr2
+    renamable $vgpr0 = COPY renamable $agpr0, implicit $exec
+    renamable $agpr1 = COPY renamable $vgpr0, implicit $exec
+    renamable $agpr2 = COPY renamable $vgpr0, implicit $exec
+    S_ENDPGM 0, implicit $vgpr0, implicit $agpr1, implicit $agpr2
+...
+---
+name:  propagate_vgpr_to_agpr
+body: |
+  bb.0:
+    successors:
+    liveins: $vgpr0
+
+    ; GFX908-LABEL: name: propagate_vgpr_to_agpr
+    ; GFX908: renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    ; GFX908: renamable $agpr1 = COPY $vgpr0, implicit $exec
+    ; GFX908: renamable $agpr2 = COPY $vgpr0, implicit $exec
+    ; GFX908: S_ENDPGM 0, implicit $agpr0, implicit $agpr1, implicit $agpr2
+    ; GFX90A-LABEL: name: propagate_vgpr_to_agpr
+    ; GFX90A: renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    ; GFX90A: renamable $agpr1 = COPY $vgpr0, implicit $exec
+    ; GFX90A: renamable $agpr2 = COPY $vgpr0, implicit $exec
+    ; GFX90A: S_ENDPGM 0, implicit $agpr0, implicit $agpr1, implicit $agpr2
+    renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    renamable $agpr1 = COPY renamable $agpr0, implicit $exec
+    renamable $agpr2 = COPY renamable $agpr0, implicit $exec
+    S_ENDPGM 0, implicit $agpr0, implicit $agpr1, implicit $agpr2
+...
+---
+name:  propagate_agpr_to_vgpr
+body: |
+  bb.0:
+    successors:
+    liveins: $agpr0
+
+    ; GFX908-LABEL: name: propagate_agpr_to_vgpr
+    ; GFX908: renamable $vgpr0 = COPY renamable $agpr0, implicit $exec
+    ; GFX908: renamable $vgpr1 = COPY $agpr0, implicit $exec
+    ; GFX908: renamable $vgpr2 = COPY $agpr0, implicit $exec
+    ; GFX908: S_ENDPGM 0, implicit $vgpr0, implicit $vgpr1, implicit $vgpr2
+    ; GFX90A-LABEL: name: propagate_agpr_to_vgpr
+    ; GFX90A: renamable $vgpr0 = COPY renamable $agpr0, implicit $exec
+    ; GFX90A: renamable $vgpr1 = COPY $agpr0, implicit $exec
+    ; GFX90A: renamable $vgpr2 = COPY $agpr0, implicit $exec
+    ; GFX90A: S_ENDPGM 0, implicit $vgpr0, implicit $vgpr1, implicit $vgpr2
+    renamable $vgpr0 = COPY renamable $agpr0, implicit $exec
+    renamable $vgpr1 = COPY renamable $vgpr0, implicit $exec
+    renamable $vgpr2 = COPY renamable $vgpr0, implicit $exec
+    S_ENDPGM 0, implicit $vgpr0, implicit $vgpr1, implicit $vgpr2
+...