[all-commits] [llvm/llvm-project] ecd682: [ARM] Add __bf16 as new Bfloat16 C Type

[Ties Stuij via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ecd682bbf5e69e8690b7e3634258f05ae0a70448
      https://github.com/llvm/llvm-project/commit/ecd682bbf5e69e8690b7e3634258f05ae0a70448
  Author: Ties Stuij <ties.stuij at arm.com>
  Date:   2020-06-05 (Fri, 05 Jun 2020)

  Changed paths:
    M clang/docs/LanguageExtensions.rst
    M clang/include/clang-c/Index.h
    M clang/include/clang/AST/ASTContext.h
    M clang/include/clang/AST/BuiltinTypes.def
    M clang/include/clang/AST/Type.h
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/Basic/Specifiers.h
    M clang/include/clang/Basic/TargetBuiltins.h
    M clang/include/clang/Basic/TargetInfo.h
    M clang/include/clang/Basic/TokenKinds.def
    M clang/include/clang/Sema/DeclSpec.h
    M clang/include/clang/Serialization/ASTBitCodes.h
    M clang/lib/AST/ASTContext.cpp
    M clang/lib/AST/ItaniumMangle.cpp
    M clang/lib/AST/MicrosoftMangle.cpp
    M clang/lib/AST/NSAPI.cpp
    M clang/lib/AST/PrintfFormatString.cpp
    M clang/lib/AST/Type.cpp
    M clang/lib/AST/TypeLoc.cpp
    M clang/lib/Basic/TargetInfo.cpp
    M clang/lib/Basic/Targets/AArch64.cpp
    M clang/lib/Basic/Targets/AArch64.h
    M clang/lib/Basic/Targets/ARM.cpp
    M clang/lib/Basic/Targets/ARM.h
    M clang/lib/CodeGen/ABIInfo.h
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/CodeGen/CGDebugInfo.cpp
    M clang/lib/CodeGen/CodeGenModule.cpp
    M clang/lib/CodeGen/CodeGenTypeCache.h
    M clang/lib/CodeGen/CodeGenTypes.cpp
    M clang/lib/CodeGen/ItaniumCXXABI.cpp
    M clang/lib/CodeGen/TargetInfo.cpp
    M clang/lib/Format/FormatToken.cpp
    M clang/lib/Index/USRGeneration.cpp
    M clang/lib/Parse/ParseDecl.cpp
    M clang/lib/Parse/ParseExpr.cpp
    M clang/lib/Parse/ParseExprCXX.cpp
    M clang/lib/Parse/ParseTentative.cpp
    M clang/lib/Sema/DeclSpec.cpp
    M clang/lib/Sema/SemaCast.cpp
    M clang/lib/Sema/SemaChecking.cpp
    M clang/lib/Sema/SemaDecl.cpp
    M clang/lib/Sema/SemaExpr.cpp
    M clang/lib/Sema/SemaOverload.cpp
    M clang/lib/Sema/SemaTemplateVariadic.cpp
    M clang/lib/Sema/SemaType.cpp
    M clang/lib/Serialization/ASTCommon.cpp
    M clang/lib/Serialization/ASTReader.cpp
    A clang/test/CodeGen/arm-bf16-params-returns.c
    A clang/test/CodeGen/arm-bf16-softfloat.c
    A clang/test/CodeGen/arm-mangle-bf16.cpp
    A clang/test/Sema/arm-bf16-forbidden-ops.c
    A clang/test/Sema/arm-bf16-forbidden-ops.cpp
    A clang/test/Sema/arm-bfloat.cpp
    M clang/tools/libclang/CXType.cpp

  Log Message:
  -----------
  [ARM] Add __bf16 as new Bfloat16 C Type

Summary:
This patch upstreams support for a new storage only bfloat16 C type.
This type is used to implement primitive support for bfloat16 data, in
line with the Bfloat16 extension of the Armv8.6-a architecture, as
detailed here:

https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/arm-architecture-developments-armv8-6-a

The bfloat type, and its properties are specified in the Arm Architecture
Reference Manual:

https://developer.arm.com/docs/ddi0487/latest/arm-architecture-reference-manual-armv8-for-armv8-a-architecture-profile

In detail this patch:
- introduces an opaque, storage-only C-type __bf16, which introduces a new bfloat IR type.

This is part of a patch series, starting with command-line and Bfloat16
assembly support. The subsequent patches will upstream intrinsics
support for BFloat16, followed by Matrix Multiplication and the
remaining Virtualization features of the armv8.6-a architecture.

The following people contributed to this patch:
- Luke Cheeseman
- Momchil Velikov
- Alexandros Lamprineas
- Luke Geeson
- Simon Tatham
- Ties Stuij

Reviewers: SjoerdMeijer, rjmccall, rsmith, liutianle, RKSimon, craig.topper, jfb, LukeGeeson, fpetrogalli

Reviewed By: SjoerdMeijer

Subscribers: labrinea, majnemer, asmith, dexonsmith, kristof.beyls, arphaman, danielkiss, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D76077