Index: llvm/lib/Target/SystemZ/SystemZAsmPrinter.cpp
===================================================================
--- llvm/lib/Target/SystemZ/SystemZAsmPrinter.cpp
+++ llvm/lib/Target/SystemZ/SystemZAsmPrinter.cpp
@@ -501,6 +501,15 @@
     }
     break;
 
+  case SystemZ::PPA:
+    assert(MI->getOperand(1).getReg() == SystemZ::NoRegister &&
+           "Expected PPA to have NoRegister as second register.");
+    LoweredMI = MCInstBuilder(SystemZ::PPA)
+      .addReg(MI->getOperand(0).getReg())
+      .addImm(0)
+      .addImm(MI->getOperand(2).getImm());
+    break;
+
   case TargetOpcode::FENTRY_CALL:
     LowerFENTRY_CALL(*MI, Lower);
     return;
Index: llvm/lib/Target/SystemZ/SystemZInstrInfo.td
===================================================================
--- llvm/lib/Target/SystemZ/SystemZInstrInfo.td
+++ llvm/lib/Target/SystemZ/SystemZInstrInfo.td
@@ -2069,7 +2069,7 @@
     def PPA : SideEffectTernaryRRFc<"ppa", 0xB2E8, GR64, GR64, imm32zx4>;
   def : Pat<(int_s390_ppa_txassist GR32:$src),
             (PPA (INSERT_SUBREG (i64 (IMPLICIT_DEF)), GR32:$src, subreg_l32),
-                 0, 1)>;
+                 zero_reg, 1)>;
 }
 
 //===----------------------------------------------------------------------===//