[llvm] [GISel][CombinerHelper] Push freeze through non-poison-producing operands (PR #90618)

[Thorsten Schütt via llvm-commits]

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@@ -1737,6 +1737,8 @@ static bool canCreateUndefOrPoison(Register Reg, const MachineRegisterInfo &MRI,
   case TargetOpcode::G_FREEZE:
     return false;
   default:
+    if (isa<GCastOp>(RegDef) || isa<GBinOp>(RegDef))
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tschuett wrote:

casts and binops can create poison

https://github.com/llvm/llvm-project/pull/90618