Index: lld/ELF/Arch/AMDGPU.cpp
===================================================================
--- lld/ELF/Arch/AMDGPU.cpp
+++ lld/ELF/Arch/AMDGPU.cpp
@@ -105,7 +105,8 @@
 }
 
 uint32_t AMDGPU::calcEFlags() const {
-  assert(!objectFiles.empty());
+  if (objectFiles.empty())
+    return 0;
 
   uint8_t abiVersion = cast<ObjFile<ELF64LE>>(objectFiles[0])->getObj()
       .getHeader().e_ident[EI_ABIVERSION];
Index: lld/ELF/SyntheticSections.cpp
===================================================================
--- lld/ELF/SyntheticSections.cpp
+++ lld/ELF/SyntheticSections.cpp
@@ -3712,7 +3712,7 @@
     return 0;
   }
 
-  if (config->emachine == EM_AMDGPU) {
+  if (config->emachine == EM_AMDGPU && !objectFiles.empty()) {
     uint8_t ver = objectFiles[0]->abiVersion;
     for (InputFile *file : makeArrayRef(objectFiles).slice(1))
       if (file->abiVersion != ver)
Index: lld/test/ELF/amdgpu-no-object-files-linked.s
===================================================================
--- /dev/null
+++ lld/test/ELF/amdgpu-no-object-files-linked.s
@@ -0,0 +1,18 @@
+# REQUIRES: amdgpu
+
+# Produce an object file that we can use to produce a shared object
+# RUN: llvm-mc -triple amdgcn-amd-amdhsa -mcpu=gfx906 --amdhsa-code-object-version=4 -filetype=obj %s -o %t.o
+
+# Produce a shared object we can try to re-link
+# RUN: ld.lld -shared %t.o -o %t.so
+
+# Try to link again where there are no object file inputs, only a shared library.
+# RUN: ld.lld -shared %t.so -o /dev/null
+
+# Test that there is no assertion if there no plain object files involved in link.
+# Issue 47690
+
+
+.text
+  s_nop 0x0
+  s_endpgm