[llvm] [SystemZ] Add custom handling of legal vectors with reduce-add. (PR #88495)

[Dominik Steenken via llvm-commits]

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@@ -444,6 +446,11 @@ SystemZTargetLowering::SystemZTargetLowering(const TargetMachine &TM,
       setOperationAction(ISD::SRL, VT, Custom);
       setOperationAction(ISD::ROTL, VT, Custom);
 
+      // Add ISD::VECREDUCE_ADD as custom in order to implement
+      // it with VZERO+VSUM
+      if (Subtarget.hasVector()) {
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dominik-steenken wrote:

ok, i will remove the check.

https://github.com/llvm/llvm-project/pull/88495