Index: llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
--- llvm/lib/Target/AArch64/AArch64TargetMachine.cpp.orig
+++ llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
@@ -358,6 +358,7 @@ AArch64TargetMachine::AArch64TargetMachine(const Targe
   // Enable GlobalISel at or below EnableGlobalISelAt0, unless this is
   // MachO/CodeModel::Large, which GlobalISel does not support.
   if (getOptLevel() <= EnableGlobalISelAtO &&
+      !getTargetTriple().isOSOpenBSD() &&
       TT.getArch() != Triple::aarch64_32 &&
       TT.getEnvironment() != Triple::GNUILP32 &&
       !(getCodeModel() == CodeModel::Large && TT.isOSBinFormatMachO())) {
