[PATCH] D135488: [codegen][WIP] Display stack layouts in console

Fri Oct 7 15:32:12 PDT 2022

nickdesaulniers added a comment.

Thanks for the patch, here's the output I observe from the LKML thread <https://lore.kernel.org/llvm/20221006222124.aabaemy7ofop7ccz@google.com/>: https://paste.debian.net/1256338/.

I think the stack slot numbers printed at the end aren't correct; the two large allocations should be `table`, `540B` which would be Slot 7 and `stack_fds`, `256B` which would be Slot 8 in the table.

Expected:

  Variable: stack_fds (line 634 of fs/select.c) in Slot: 8
  Variable: table (line 482 of fs/select.c) in Slot: 7

Actual:

  Variable: stack_fds (line 634 of fs/select.c) in Slot: 3
  Variable: table (line 482 of fs/select.c) in Slot: 2

What does `Fixed` mean? What does it mean for there to be a stack slot that's not a `Spill`, but not allocated to a particular variable?

Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D135488/new/

https://reviews.llvm.org/D135488