diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
index d83ecc699b192b..2340be5b591551 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -4780,6 +4780,7 @@ class PPCAsmPseudo<string asm, dag iops>
 def : InstAlias<"sc", (SC 0)>;
 
 def : InstAlias<"sync", (SYNC 0)>, Requires<[HasSYNC]>;
+def : InstAlias<"hwsync", (SYNC 0), 0>, Requires<[HasSYNC]>;
 def : InstAlias<"msync", (SYNC 0), 0>, Requires<[HasSYNC]>;
 def : InstAlias<"lwsync", (SYNC 1)>, Requires<[HasSYNC]>;
 def : InstAlias<"ptesync", (SYNC 2)>, Requires<[HasSYNC]>;
diff --git a/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s b/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
index bd50e2321ffdfa..70410fa30ae528 100644
--- a/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
+++ b/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
@@ -207,6 +207,9 @@
 # CHECK-BE: lwsync                          # encoding: [0x7c,0x20,0x04,0xac]
 # CHECK-LE: lwsync                          # encoding: [0xac,0x04,0x20,0x7c]
             lwsync
+# CHECK-BE: sync                            # encoding: [0x7c,0x00,0x04,0xac]
+# CHECK-LE: sync                            # encoding: [0xac,0x04,0x00,0x7c]
+            hwsync
 # CHECK-BE: ptesync                         # encoding: [0x7c,0x40,0x04,0xac]
 # CHECK-LE: ptesync                         # encoding: [0xac,0x04,0x40,0x7c]
             ptesync