diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
index a09a69f946ef78..bc59b6beafc785 100644
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -373,6 +373,18 @@ void darwin::Linker::AddLinkArgs(Compilation &C, const ArgList &Args,
       D.Diag(diag::err_drv_bitcode_unsupported_on_toolchain);
   }
 
+  // If GlobalISel is enabled, pass it through to LLVM.
+  if (Arg *A = Args.getLastArg(options::OPT_fglobal_isel,
+                               options::OPT_fno_global_isel)) {
+    if (A->getOption().matches(options::OPT_fglobal_isel)) {
+      CmdArgs.push_back("-mllvm");
+      CmdArgs.push_back("-global-isel");
+      // Disable abort and fall back to SDAG silently.
+      CmdArgs.push_back("-mllvm");
+      CmdArgs.push_back("-global-isel-abort=0");
+    }
+  }
+
   Args.AddLastArg(CmdArgs, options::OPT_prebind);
   Args.AddLastArg(CmdArgs, options::OPT_noprebind);
   Args.AddLastArg(CmdArgs, options::OPT_nofixprebinding);
diff --git a/clang/test/Driver/darwin-ld-lto.c b/clang/test/Driver/darwin-ld-lto.c
index 05e6bccd00f089..252ca148c52003 100644
--- a/clang/test/Driver/darwin-ld-lto.c
+++ b/clang/test/Driver/darwin-ld-lto.c
@@ -30,3 +30,11 @@
 // THIN_LTO_OBJECT_PATH: {{ld(.exe)?"}}
 // THIN_LTO_OBJECT_PATH-SAME: "-object_path_lto"
 // THIN_LTO_OBJECT_PATH-SAME: {{thinlto\-[a-zA-Z0-9_]+}}
+
+
+// Check that we pass through -fglobal-isel flags to libLTO.
+// RUN: %clang -target arm64-apple-darwin %s -flto -fglobal-isel -### 2>&1 | \
+// RUN:   FileCheck --check-prefix=GISEL %s
+// GISEL: {{ld(.exe)?"}}
+// GISEL: "-mllvm" "-global-isel"
+// GISEL: "-mllvm" "-global-isel-abort=0"