[SystemZ] Remember to reset the NoPHIs property on MF in createPHIsForSelects()

After creating new PHI instructions during isel pseudo expansion, the NoPHIs
property of MF should be reset in case it was previously set.

Review: Ulrich Weigand

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352030 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/SystemZ/SystemZISelLowering.cpp

@@ -6237,6 +6237,8 @@ static void createPHIsForSelects(MachineBasicBlock::iterator MIItBegin,
     // Add this PHI to the rewrite table.
     RegRewriteTable[DestReg] = std::make_pair(TrueReg, FalseReg);
   }
+
+  MF->getProperties().reset(MachineFunctionProperties::Property::NoPHIs);
 }
 
 // Implement EmitInstrWithCustomInserter for pseudo Select* instruction MI.

test/CodeGen/SystemZ/debuginstr-02.mir

@@ -1,8 +1,8 @@
 # Check that the backend can handle consecutive select instructions also in
 # the presence of DEBUG_VALUE machine instructions.
 #
-# RUN: llc %s -mtriple=s390x-linux-gnu -mcpu=z13 -start-before=expand-isel-pseudos \
-# RUN:   -o - 2>&1 | FileCheck %s
+# RUN: llc %s -verify-machineinstrs -mtriple=s390x-linux-gnu -mcpu=z13 \
+# RUN:   -start-before=expand-isel-pseudos -o - 2>&1 | FileCheck %s
 #
 # CHECK-LABEL: %bb.1:
 # CHECK:       ldr