[llvm] SelectionDAG store merging default implementations are unreasonable #90714 (PR #131424)

[Matt Arsenault via llvm-commits]

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@@ -642,6 +642,11 @@ MachineInstrBuilder MachineIRBuilder::buildUndef(const DstOp &Res) {
   return buildInstr(TargetOpcode::G_IMPLICIT_DEF, {Res}, {});
 }
 
+MachineInstrBuilder MachineIRBuilder::buildPoison(const DstOp &Res) {
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arsenm wrote:

Unrelated change 

https://github.com/llvm/llvm-project/pull/131424