[PATCH] D119289: [Clang] Add lowering for _C complex arithmetic to complex intrinsics.

[Joshua Cranmer via Phabricator via cfe-commits]

jcranmer-intel created this revision.
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This adds a new guard flag, -fuse-complex-intrinsics, that is defaulted to on
for the x86/x86-64 platforms, as they can be lowered to complex intrinsics
through the entire pipeline correctly. Other platforms could be added, but it
requires auditing their support correctly in the backend, and I don't have as
much familiarity with their ABIs as I do for x86/x86-64. Help would be
appreciated.

Future patches will build on top of this support to enable more complex limited
range support, but only when lowering to intrinsics.

Depends on D119288 <https://reviews.llvm.org/D119288>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D119289

Files:
  clang/include/clang/Basic/CodeGenOptions.def
  clang/include/clang/Basic/FPOptions.def
  clang/include/clang/Basic/LangOptions.def
  clang/include/clang/Basic/LangOptions.h
  clang/include/clang/Driver/Options.td
  clang/lib/CodeGen/CGExprComplex.cpp
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/test/CodeGen/complex-intrinsics.c

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