Index: lib/Target/AArch64/AArch64.td
===================================================================
--- lib/Target/AArch64/AArch64.td
+++ lib/Target/AArch64/AArch64.td
@@ -117,0 +118,8 @@
+def ProcExynosM1 : SubtargetFeature<"m1", "ARMProcFamily", "ExynosM1",
+                                    "Exynos-M1 SAMSUNG processors",
+                                    [FeatureFPARMv8,
+                                    FeatureNEON,
+                                    FeatureCrypto,
+                                    FeatureCRC,
+                                    FeaturePerfMon]>;
+
@@ -138,0 +147 @@
+def : ProcessorModel<"exynos-m1", NoSchedModel, [ProcExynosM1]>;
Index: lib/Target/AArch64/AArch64Subtarget.h
===================================================================
--- lib/Target/AArch64/AArch64Subtarget.h
+++ lib/Target/AArch64/AArch64Subtarget.h
@@ -36 +36,8 @@
-  enum ARMProcFamilyEnum {Others, CortexA35, CortexA53, CortexA57, Cyclone};
+  enum ARMProcFamilyEnum {
+    Others,
+    CortexA35,
+    CortexA53,
+    CortexA57,
+    Cyclone,
+    ExynosM1
+  };
@@ -144,0 +152 @@
+  bool isExynosM1() const { return CPUString == "exynos-m1"; }