Fix typo in comment. NFC

llvm-svn: 347544
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 516f5ce..37069ce 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -675,7 +675,7 @@
                                 MIRBuilder.buildConstant(WideTy, SizeDiff));
     }
     auto &TII = *MI.getMF()->getSubtarget().getInstrInfo();
-    // Make the original instruction a trunc now, and update it's source.
+    // Make the original instruction a trunc now, and update its source.
     MI.setDesc(TII.get(TargetOpcode::G_TRUNC));
     MI.getOperand(1).setReg(MIBNewOp->getOperand(0).getReg());
     MIRBuilder.recordInsertion(&MI);