[WebAssembly] Fix comments to say "LIFO" instead of "FIFO" when describing a stack.

llvm-svn: 254523
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp
index dbd00bc..110316b 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp
@@ -341,7 +341,7 @@
   PlaceMarkers(MF, MLI, TII, MDT);
 
 #ifndef NDEBUG
-  // Verify that block and loop beginnings and endings are in FIFO order, and
+  // Verify that block and loop beginnings and endings are in LIFO order, and
   // that all references to blocks are to blocks on the stack at the point of
   // the reference.
   SmallVector<std::pair<MachineBasicBlock *, bool>, 0> Stack;