diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -5089,9 +5089,9 @@
   }
 
   // Enable -mconstructor-aliases except on darwin, where we have to work around
-  // a linker bug (see <rdar://problem/7651567>), and CUDA/AMDGPU device code,
-  // where aliases aren't supported.
-  if (!RawTriple.isOSDarwin() && !RawTriple.isNVPTX() && !RawTriple.isAMDGPU())
+  // a linker bug (see <rdar://problem/7651567>), and CUDA device code, where
+  // aliases aren't supported.
+  if (!RawTriple.isOSDarwin() && !RawTriple.isNVPTX())
     CmdArgs.push_back("-mconstructor-aliases");
 
   // Darwin's kernel doesn't support guard variables; just die if we
diff --git a/clang/test/CodeGenCUDA/amdgpu-alias-undef-symbols.cu b/clang/test/CodeGenCUDA/amdgpu-alias-undef-symbols.cu
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGenCUDA/amdgpu-alias-undef-symbols.cu
@@ -0,0 +1,17 @@
+// REQUIRES: amdgpu-registered-target, clang-driver
+
+// RUN: %clang -target x86_64-unknown-linux-gnu --offload-arch=gfx906 --cuda-device-only -nogpulib -nogpuinc -x hip -emit-llvm -S -o - %s \
+// RUN:   -fgpu-rdc -O3 -mllvm -amdgpu-early-inline-all=true -mllvm -amdgpu-function-calls=false | \
+// RUN:   FileCheck %s
+
+#include "Inputs/cuda.h"
+
+// CHECK: %struct.B = type { i8 }
+struct B {
+
+  // CHECK: @_ZN1BC1Ei = hidden unnamed_addr alias void (%struct.B*, i32), void (%struct.B*, i32)* @_ZN1BC2Ei
+  __device__ B(int x);
+};
+
+__device__ B::B(int x) {
+}
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp b/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
--- a/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
@@ -15,6 +15,7 @@
 #include "AMDGPU.h"
 #include "AMDGPUTargetMachine.h"
 #include "Utils/AMDGPUBaseInfo.h"
+#include "llvm/CodeGen/CommandFlags.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/CommandLine.h"
@@ -90,9 +91,13 @@
 
   SmallPtrSet<Function *, 8> FuncsToAlwaysInline;
   SmallPtrSet<Function *, 8> FuncsToNoInline;
+  Triple TT(M.getTargetTriple());
 
   for (GlobalAlias &A : M.aliases()) {
     if (Function* F = dyn_cast<Function>(A.getAliasee())) {
+      if (TT.getArch() == Triple::amdgcn &&
+          A.getLinkage() != GlobalValue::InternalLinkage)
+        continue;
       A.replaceAllUsesWith(F);
       AliasesToRemove.push_back(&A);
     }
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUResourceUsageAnalysis.cpp b/llvm/lib/Target/AMDGPU/AMDGPUResourceUsageAnalysis.cpp
--- a/llvm/lib/Target/AMDGPU/AMDGPUResourceUsageAnalysis.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUResourceUsageAnalysis.cpp
@@ -29,6 +29,8 @@
 #include "SIMachineFunctionInfo.h"
 #include "llvm/Analysis/CallGraph.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/IR/GlobalAlias.h"
+#include "llvm/IR/GlobalValue.h"
 #include "llvm/Target/TargetMachine.h"
 
 using namespace llvm;
@@ -61,7 +63,8 @@
     assert(Op.getImm() == 0);
     return nullptr;
   }
-
+  if (auto *GA = dyn_cast<GlobalAlias>(Op.getGlobal()))
+    return cast<Function>(GA->getOperand(0));
   return cast<Function>(Op.getGlobal());
 }
 
diff --git a/llvm/test/CodeGen/AMDGPU/inline-calls.ll b/llvm/test/CodeGen/AMDGPU/inline-calls.ll
--- a/llvm/test/CodeGen/AMDGPU/inline-calls.ll
+++ b/llvm/test/CodeGen/AMDGPU/inline-calls.ll
@@ -1,6 +1,6 @@
-; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck  %s
-; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck  %s
-; RUN: llc -march=r600 -mcpu=redwood -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -mtriple amdgcn-unknown-linux-gnu -mcpu=tahiti -verify-machineinstrs < %s | FileCheck  %s
+; RUN: llc -mtriple amdgcn-unknown-linux-gnu -mcpu=tonga -verify-machineinstrs < %s | FileCheck  %s
+; RUN: llc -mtriple r600-unknown-linux-gnu -mcpu=redwood -verify-machineinstrs < %s | FileCheck %s --check-prefix=R600
 
 ; ALL-NOT: {{^}}func:
 define internal i32 @func(i32 %a) {
@@ -9,7 +9,7 @@
   ret i32 %tmp0
 }
 
-; ALL: {{^}}kernel:
+; CHECK: {{^}}kernel:
 ; GCN-NOT: s_swappc_b64
 define amdgpu_kernel void @kernel(i32 addrspace(1)* %out) {
 entry:
@@ -18,12 +18,13 @@
   ret void
 }
 
-; CHECK-NOT: func_alias
-; ALL-NOT: func_alias
+; CHECK: func_alias
+; R600-NOT: func_alias
 @func_alias = alias i32 (i32), i32 (i32)* @func
 
-; ALL: {{^}}kernel3:
+; CHECK-NOT: {{^}}kernel3:
 ; GCN-NOT: s_swappc_b64
+; R600: {{^}}kernel3:
 define amdgpu_kernel void @kernel3(i32 addrspace(1)* %out) {
 entry:
   %tmp0 = call i32 @func_alias(i32 1)