From 4dc0b1ac60f947c23bbb0e20a7efb636c214b0a8 Mon Sep 17 00:00:00 2001 From: Reid Kleckner Date: Thu, 1 Nov 2018 19:54:45 +0000 Subject: Fix clang -Wimplicit-fallthrough warnings across llvm, NFC This patch should not introduce any behavior changes. It consists of mostly one of two changes: 1. Replacing fall through comments with the LLVM_FALLTHROUGH macro 2. Inserting 'break' before falling through into a case block consisting of only 'break'. We were already using this warning with GCC, but its warning behaves slightly differently. In this patch, the following differences are relevant: 1. GCC recognizes comments that say "fall through" as annotations, clang doesn't 2. GCC doesn't warn on "case N: foo(); default: break;", clang does 3. GCC doesn't warn when the case contains a switch, but falls through the outer case. I will enable the warning separately in a follow-up patch so that it can be cleanly reverted if necessary. Reviewers: alexfh, rsmith, lattner, rtrieu, EricWF, bollu Differential Revision: https://reviews.llvm.org/D53950 llvm-svn: 345882 --- clang/lib/Parse/ParseDecl.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'clang/lib/Parse/ParseDecl.cpp') diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp index af7bbfc94e8..af6214cdf66 100644 --- a/clang/lib/Parse/ParseDecl.cpp +++ b/clang/lib/Parse/ParseDecl.cpp @@ -4661,7 +4661,7 @@ bool Parser::isTypeSpecifierQualifier() { case tok::identifier: // foo::bar if (TryAltiVecVectorToken()) return true; - // Fall through. + LLVM_FALLTHROUGH; case tok::kw_typename: // typename T::type // Annotate typenames and C++ scope specifiers. If we get one, just // recurse to handle whatever we get. @@ -4795,7 +4795,7 @@ bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) { return false; if (TryAltiVecVectorToken()) return true; - // Fall through. + LLVM_FALLTHROUGH; case tok::kw_decltype: // decltype(T())::type case tok::kw_typename: // typename T::type // Annotate typenames and C++ scope specifiers. If we get one, just -- cgit v1.2.3