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PR19713: Don't warn on unused static inline functions, even if the 'inline' was 

implied by 'constexpr'.

llvm-svn: 208511
This commit is contained in:
Richard Smith 2014-05-11 21:25:24 +00:00
parent 46013d903f
commit a90ee35a8e
2 changed files with 18 additions and 2 deletions
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5
clang/lib/Sema/SemaDecl.cpp
View File

@ -1219,8 +1219,7 @@ bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const {
return false;
} else {
// 'static inline' functions are defined in headers; don't warn.
if (FD->isInlineSpecified() &&
!isMainFileLoc(*this, FD->getLocation()))
if (FD->isInlined() && !isMainFileLoc(*this, FD->getLocation()))
return false;
}
@ -1245,6 +1244,8 @@ bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const {
}
// Only warn for unused decls internal to the translation unit.
// FIXME: This seems like a bogus check; it suppresses -Wunused-function
// for inline functions defined in the main source file, for instance.
return mightHaveNonExternalLinkage(D);
}

15
clang/test/SemaCXX/warn-unused-filescoped.cpp
View File

@ -32,6 +32,13 @@ namespace test7
inline void bar(int, int) { }
};
namespace pr19713 {
#if __cplusplus >= 201103L
static constexpr int constexpr1() { return 1; }
constexpr int constexpr2() { return 2; }
#endif
}
#else
#define HEADER
#include "warn-unused-filescoped.cpp"
@ -193,4 +200,12 @@ void bar() { void func() __attribute__((used)); }
static void func() {}
}
namespace pr19713 {
#if __cplusplus >= 201103L
// FIXME: We should warn on both of these.
static constexpr int constexpr3() { return 1; } // expected-warning {{unused}}
constexpr int constexpr4() { return 2; }
#endif
}
#endif