[llvm] [DAG] canCreateUndefOrPoison - add handling for ISD::ABS nodes (PR #148791)

Matt Arsenault via llvm-commits llvm-commits at lists.llvm.org
Tue Jul 15 00:20:34 PDT 2025


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@@ -5550,6 +5550,7 @@ bool SelectionDAG::canCreateUndefOrPoison(SDValue Op, const APInt &DemandedElts,
   case ISD::UMAX:
   case ISD::AND:
   case ISD::XOR:
+  case ISD::ABS:
----------------
arsenm wrote:

If this is different from the intrinsic, that's annoying and probably bad. But worth keeping as a separate case with a comment calling that out 

https://github.com/llvm/llvm-project/pull/148791


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