[cfe-commits] r168410 - /cfe/trunk/lib/AST/Decl.cpp
Daniel Dunbar
daniel at zuster.org
Mon Nov 26 16:24:07 PST 2012
Hi Rafael,
This code doesn't appear to be redundant, one of either this or the next
commit broke gcc.dg/debug/redecl-1.c in the GCC test suite.
You can repro with:
--
$ curl -s
http://llvm.org/svn/llvm-project/clang-tests/trunk/gcc-4_2-testsuite/src/gcc.dg/debug/redecl-1.c|
daclang -w -fsyntax-only -x c -
<stdin>:338:9: error: invalid application of 'sizeof' to an incomplete type
'IA'
(aka 'int []')
sizeof(*c18());
^~~~~~~~
1 error generated.
--
- Daniel
On Tue, Nov 20, 2012 at 6:47 PM, Rafael Espindola <
rafael.espindola at gmail.com> wrote:
> Author: rafael
> Date: Tue Nov 20 20:47:19 2012
> New Revision: 168410
>
> URL: http://llvm.org/viewvc/llvm-project?rev=168410&view=rev
> Log:
> Remove redundant code.
>
> Modified:
> cfe/trunk/lib/AST/Decl.cpp
>
> Modified: cfe/trunk/lib/AST/Decl.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/Decl.cpp?rev=168410&r1=168409&r2=168410&view=diff
>
> ==============================================================================
> --- cfe/trunk/lib/AST/Decl.cpp (original)
> +++ cfe/trunk/lib/AST/Decl.cpp Tue Nov 20 20:47:19 2012
> @@ -355,30 +355,9 @@
> if (Function->getStorageClass() == SC_PrivateExtern)
> LV.mergeVisibility(HiddenVisibility, true);
>
> - // C99 6.2.2p5:
> - // If the declaration of an identifier for a function has no
> - // storage-class specifier, its linkage is determined exactly
> - // as if it were declared with the storage-class specifier
> - // extern.
> - if (!Context.getLangOpts().CPlusPlus &&
> - (Function->getStorageClass() == SC_Extern ||
> - Function->getStorageClass() == SC_PrivateExtern ||
> - Function->getStorageClass() == SC_None)) {
> - // C99 6.2.2p4:
> - // For an identifier declared with the storage-class specifier
> - // extern in a scope in which a prior declaration of that
> - // identifier is visible, if the prior declaration specifies
> - // internal or external linkage, the linkage of the identifier
> - // at the later declaration is the same as the linkage
> - // specified at the prior declaration. If no prior declaration
> - // is visible, or if the prior declaration specifies no
> - // linkage, then the identifier has external linkage.
> - if (const FunctionDecl *PrevFunc = Function->getPreviousDecl()) {
> - LinkageInfo PrevLV = getLVForDecl(PrevFunc, OnlyTemplate);
> - if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage());
> - LV.mergeVisibility(PrevLV);
> - }
> - }
> + // Note that Sema::MergeCompatibleFunctionDecls already takes care of
> + // merging storage classes and visibility attributes, so we don't
> have to
> + // look at previous decls in here.
>
> // In C++, then if the type of the function uses a type with
> // unique-external linkage, it's not legally usable from outside
>
>
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