Index: COFF/Driver.cpp
===================================================================
--- COFF/Driver.cpp
+++ COFF/Driver.cpp
@@ -1850,7 +1850,12 @@
 
   // Windows specific -- when we are creating a .dll file, we also
   // need to create a .lib file.
-  if (!config->exports.empty() || config->dll) {
+  bool createImpLib;
+  if (config->mingw)
+    createImpLib = !config->implib.empty();
+  else
+    createImpLib = !config->exports.empty() || config->dll;
+  if (createImpLib) {
     fixupExports();
     createImportLibrary(/*asLib=*/false);
     assignExportOrdinals();
Index: test/COFF/implib-name-mingw.test
===================================================================
--- /dev/null
+++ test/COFF/implib-name-mingw.test
@@ -0,0 +1,20 @@
+REQUIRES: x86
+RUN: mkdir -p %t-out
+RUN: llvm-mc -triple x86_64-windows-gnu -filetype obj -o %t-out/object.obj %S/Inputs/object.s
+
+Check that linking without an explicit -implib doesn't produce any implib.
+
+First test that linking without -lldmingw does produce an implib, but when
+adding -lldmingw, it no longer is produced. And when it is explicitly named,
+it is created.
+
+RUN: rm -f %t-out/library.lib
+RUN: lld-link -dll -machine:x64 -def:%S/Inputs/named.def -out:%t-out/library.dll %t-out/object.obj -entry:f -subsystem:console
+RUN: test -f %t-out/library.lib
+
+RUN: rm -f %t-out/library.lib
+RUN: lld-link -lldmingw -dll -machine:x64 -def:%S/Inputs/named.def -out:%t-out/library.dll %t-out/object.obj -entry:f -subsystem:console
+RUN: not test -f %t-out/library.lib
+
+RUN: lld-link -lldmingw -dll -machine:x64 -def:%S/Inputs/named.def -out:%t-out/library.dll %t-out/object.obj -entry:f -subsystem:console -implib:%t-out/library.lib
+RUN: test -f %t-out/library.lib