[PATCH] D115441: [X86][MS] Add 80bit long double support for Windows

[Reid Kleckner via Phabricator via cfe-commits]

rnk added a comment.

I see, thanks for the info.  Can you please add a targeted LLVM test for long double arguments? From what I can tell, the auto-generated update_llc_test_checks.py style tests are not a good fit for testing parameter passing because they pattern-match away the stack offsets which are relevant to the test.

I think it's also worth breaking this into LLVM and clang-side patches:

1. make clang emit x86_fp80 with -mlong-double-80
2. update LLVM datalayout (must affect clang via clang/lib/Basic/Targets/X86.h) to align fp80 to 16 bytes in the MSVC environment


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D115441/new/

https://reviews.llvm.org/D115441