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Revert r168519, "Merge used flags so that we don't have to iterate on isUsed. With this change" 

It brought bunch of (possibly false) warnings.

llvm/unittests/VMCore/PassManagerTest.cpp:60:22: warning: variable 'ID' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    char ModuleNDNM::ID=0;
                     ^
llvm/unittests/VMCore/PassManagerTest.cpp:86:22: warning: variable 'ID' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    char ModuleNDM2::ID=0;
                     ^
llvm/unittests/VMCore/PassManagerTest.cpp:106:21: warning: variable 'ID' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    char ModuleDNM::ID=0;
                    ^
llvm/unittests/VMCore/PassManagerTest.cpp:217:16: warning: variable 'initcount' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    int LPass::initcount=0;
               ^
llvm/unittests/VMCore/PassManagerTest.cpp:218:16: warning: variable 'fincount' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    int LPass::fincount=0;
               ^
llvm/unittests/VMCore/PassManagerTest.cpp:259:16: warning: variable 'inited' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    int BPass::inited=0;
               ^
llvm/unittests/VMCore/PassManagerTest.cpp:260:16: warning: variable 'fin' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    int BPass::fin=0;
               ^
llvm/unittests/VMCore/PassManagerTest.cpp:283:24: warning: variable 'ID' is not needed and will not be emitted [-Wunneeded-internal-declaration]
    char OnTheFlyTest::ID=0;
                       ^
8 warnings generated.

llvm-svn: 168549
This commit is contained in:
NAKAMURA Takumi 2012-11-24 23:17:09 +00:00
parent d374694b07
commit c232cb8542
2 changed files with 7 additions and 4 deletions
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7
clang/lib/AST/DeclBase.cpp
View File

@ -261,6 +261,13 @@ bool Decl::isUsed(bool CheckUsedAttr) const {
if (CheckUsedAttr && hasAttr<UsedAttr>())
return true;
// Check redeclarations. We merge attributes, so we don't need to check
// attributes in all redeclarations.
for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) {
if (I->Used)
return true;
}
return false;
}

4
clang/lib/Sema/SemaDecl.cpp
View File

@ -2388,10 +2388,6 @@ bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old,
if (Old->isPure())
New->setPure();
// Merge "used" flag.
if (Old->isUsed(false))
New->setUsed();
// Merge attributes from the parameters. These can mismatch with K&R
// declarations.
if (New->getNumParams() == Old->getNumParams())