[GISel][AArch64] Notify the Observer when CTTZ lowering changes the opcode to CTPOP. (#72008)
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index cde5bc7..b351e6d 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -5942,8 +5942,10 @@
MI.eraseFromParent();
return Legalized;
}
+ Observer.changingInstr(MI);
MI.setDesc(TII.get(TargetOpcode::G_CTPOP));
MI.getOperand(1).setReg(MIBTmp.getReg(0));
+ Observer.changedInstr(MI);
return Legalized;
}
case TargetOpcode::G_CTPOP: {
