[PATCH] D28148: [Sema] Suppress warnings for C's zero initializer

[S. Gilles via Phabricator via cfe-commits]

sgilles created this revision.
sgilles added reviewers: cfe-commits, rsmith, zaks.anna.

Add ZeroInitializer as a language option, attached to all standards of
C. Relax checks for -Wmissing-field-initializers and -Wmissing-braces so
that, for such languages, assigning to a structure with { 0 } produces
no warnings.  Add tests.

This fixes PR21689, which is mentioned by the Austin Group at
http://austingroupbugs.net/view.php?id=918 .  It does not extend this
treatment of { 0 } to C++.

Patch by S. Gilles


https://reviews.llvm.org/D28148

Files:
  include/clang/Basic/LangOptions.def
  include/clang/Frontend/LangStandard.h
  include/clang/Frontend/LangStandards.def
  lib/Frontend/CompilerInvocation.cpp
  lib/Sema/SemaInit.cpp
  test/Sema/zero-initializer.c

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