Revert "[SystemZ] Bugfix in expansion of memmem operations."

Sorry - mir test fails with expensive checks on build bot. Seems to relate to the fact that there are no PHIs in the .mir input, but after they are created the verifyer reports "Found PHI instruction with NoPHIs property set". This reverts commit 00454a1.
llvm · May 10, 2023 · dfa42a6 · dfa42a6
1 parent 00454a1
commit dfa42a6
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Showing 2 changed files with 2 additions and 129 deletions.
diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
@@ -8502,10 +8502,9 @@ SystemZTargetLowering::emitMemMemWrapper(MachineInstr &MI,
           .addReg(RemSrcReg).addImm(SrcDisp);
       MBB->addSuccessor(AllDoneMBB);
       MBB = AllDoneMBB;
-      if (Opcode != SystemZ::MVC) {
+      if (EndMBB) {
         EXRL_MIB.addReg(SystemZ::CC, RegState::ImplicitDefine);
-        if (EndMBB)
-          MBB->addLiveIn(SystemZ::CC);
+        MBB->addLiveIn(SystemZ::CC);
       }
     }
   }

diff --git a/llvm/test/CodeGen/SystemZ/memmem-exrl-cc.mir b/llvm/test/CodeGen/SystemZ/memmem-exrl-cc.mir