$OpenBSD: patch-lib_Target_AArch64_AArch64InstrInfo_td,v 1.3 2019/07/06 15:06:36 jca Exp $

Add retguard for arm64.

Index: lib/Target/AArch64/AArch64InstrInfo.td
--- lib/Target/AArch64/AArch64InstrInfo.td.orig
+++ lib/Target/AArch64/AArch64InstrInfo.td
@@ -491,6 +491,12 @@ def ADDlowTLS
 
 } // isReMaterializable, isCodeGenOnly
 
+//===----------------------------------------------------------------------===//
+// Pseudo instruction used by retguard
+let isCodeGenOnly = 1, hasNoSchedulingInfo = 1 in {
+    def RETGUARD_JMP_TRAP: Pseudo<(outs), (ins GPR64:$reg), []>;
+}
+
 def : Pat<(AArch64LOADgot tglobaltlsaddr:$addr),
           (LOADgot tglobaltlsaddr:$addr)>;