[llvm] [CodeGen][ShrinkWrap] Clarify StackAddressUsedBlockInfo meaning (PR #80679)

[Quentin Colombet via llvm-commits]

================
@@ -948,6 +948,9 @@ bool ShrinkWrap::runOnMachineFunction(MachineFunction &MF) {
 
   bool Changed = false;
 
+  // Initially, conservatively assume that stack addresses can be used in each
+  // basic block and change the state only for those basic blocks for which we
+  // were able to prove the opposite.
----------------
qcolombet wrote:

That part looks good.

https://github.com/llvm/llvm-project/pull/80679