[PATCH] D93497: Salvage debug info for function arguments in coro-split funclets.

[Chuanqi Xu via Phabricator via llvm-commits]

ChuanqiXu added a comment.

Hi all, I want to ask some question about the debug information in coroutine. I wonder this patch may be a suitable place.
I know this patch intentionally to solve problems under O0. 
And  I want to enable the ability to debug coroutine program with optimization.
Now I create following instruction with '-O2 -emit-llvm':

  %local.reload.addr = getelementptr %FramePtrTy, %FramePtrTy %Frame, ...
  call void @llvm.dbg.declare(metadata %"struct_type"* %a.reload.addr, metadata !1, metadata !DIExpression()), !dbg !2
  ; ...
  !1 = !DILocalVariable(name: "a", ... );

But I find I can't print the value of a in debugger. To my understanding, `%a.reload.addr` marks the address of `a`. So gdb should know the address of `a` and print its value.
What's going wrong?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D93497/new/

https://reviews.llvm.org/D93497