[PATCH] D151297: [clang][test][LoongArch] Pre-commit test for empty struct in C++ mode

[wanglei via Phabricator via cfe-commits]

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This is a preliminary patch that adds test cases for handling empty
structs in C++.

The current implementation for passing empty structs is inconsistent
with the calling convention description. For example, when there is only
one empty struct (it satisfies the condition `0 < WOA < GRLEN`),
according to the calling convention, it should be passed through a
GAR (if exists). However, the current implementation does not pass it.
Upcoming patch will address these inconsistencies.

Change-Id: Icc47e56ae7102dc1baebabd48ba93f562a8d5802


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151297

Files:
  clang/test/CodeGenCXX/LoongArch/abi-lp64d-empty-struct.cpp

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