[PATCH] D122234: [clang] Link libbitint for large division of _BitInt; increase max _BitInt size

[Matthias Gehre via Phabricator via cfe-commits]

mgehre-amd created this revision.
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According to the RFC [0], this review contains the clang parts of large integer divison for _BitInt.

It contains the following parts:

- Driver: Gnu, MinGW: Link libbitint when available
- clang/Basic/TargetInfo: Increase getMaxBitIntWidth to llvm::IntegerType::MAX_INT_BITS
- Sema: Diagnose when converting _BitInt to/from floating point for bit width > 128 because that breaks in the backend
- Lex: Speedup parsing of large integer literals with a power-of-two radix, so parsing a hex literal with 2097152 digits (=MAX_INT_BITS) doesn't take forever

[0] https://discourse.llvm.org/t/rfc-add-support-for-division-of-large-bitint-builtins-selectiondag-globalisel-clang/60329


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D122234

Files:
  clang/include/clang/Basic/DiagnosticSemaKinds.td
  clang/include/clang/Basic/TargetInfo.h
  clang/include/clang/Sema/Sema.h
  clang/lib/Driver/ToolChains/CommonArgs.cpp
  clang/lib/Driver/ToolChains/CommonArgs.h
  clang/lib/Driver/ToolChains/Gnu.cpp
  clang/lib/Driver/ToolChains/MinGW.cpp
  clang/lib/Lex/LiteralSupport.cpp
  clang/lib/Sema/Sema.cpp
  clang/lib/Sema/SemaCast.cpp
  clang/test/CodeGen/ext-int-cc.c
  clang/test/Driver/linux-ld.c
  clang/test/Lexer/bitint-constants.c
  clang/test/Preprocessor/init-aarch64.c
  clang/test/Preprocessor/init.c
  clang/test/Sema/ext-int.c
  clang/test/SemaCXX/ext-int.cpp

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