[PATCH] D79760: [WinEH64] Fix a crush issue when c++ exception nested in a particular form.

[Pengfei Wang via Phabricator via llvm-commits]

pengfei created this revision.
pengfei added reviewers: andrew.w.kaylor, majnemer, rnk.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

This patch fix the bug PR42266. When c++ exception was nested in a
particular form, the stack was not properly unwound under Win64 due to the
layout of try map table.
Tacking what MSVC's doing, I found the 64 bits layout of try map table
is different from 32 bits. By following what MSVC's doing, this issue can
be fixed.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D79760

Files:
  llvm/include/llvm/CodeGen/WinEHFuncInfo.h
  llvm/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
  llvm/lib/CodeGen/WinEHPrepare.cpp
  llvm/lib/Target/X86/X86WinEHState.cpp
  llvm/test/CodeGen/X86/win-catchpad-nested-cxx.ll

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