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Make __gnu_inline__ functions in gnu99 mode work the same way as inline functions in gnu89 mode in terms of redefinitions. 

rdar://9559708 .

llvm-svn: 132953
This commit is contained in:
Eli Friedman 2011-06-13 23:56:42 +00:00
parent 922e4940bd
commit 51dd0185d6
3 changed files with 27 additions and 18 deletions
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3
clang/lib/Sema/SemaDecl.cpp
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@ -1527,7 +1527,8 @@ Sema::CXXSpecialMember Sema::getSpecialMember(const CXXMethodDecl *MD) {
/// GNU89 mode.
static bool canRedefineFunction(const FunctionDecl *FD,
const LangOptions& LangOpts) {
return (LangOpts.GNUInline && !LangOpts.CPlusPlus &&
return ((FD->hasAttr<GNUInlineAttr>() || LangOpts.GNUInline) &&
!LangOpts.CPlusPlus &&
FD->isInlineSpecified() &&
FD->getStorageClass() == SC_Extern);
}

24
clang/test/Sema/inline-redef.c Normal file
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@ -0,0 +1,24 @@
// RUN: %clang_cc1 -std=gnu89 -fsyntax-only -verify %s
// RUN: %clang_cc1 -fsyntax-only -verify %s
#if __STDC_VERSION__ >= 199901
#define GNU_INLINE __attribute((__gnu_inline__))
#else
#define GNU_INLINE
#endif
// PR5253
// rdar://9559708 (same extension in C99 mode)
// GNU Extension: check that we can redefine an extern inline function
GNU_INLINE extern inline int f(int a) {return a;}
int f(int b) {return b;} // expected-note{{previous definition is here}}
// And now check that we can't redefine a normal function
int f(int c) {return c;} // expected-error{{redefinition of 'f'}}
// Check that we can redefine an extern inline function as a static function
GNU_INLINE extern inline int g(int a) {return a;}
static int g(int b) {return b;}
// Check that we ensure the types of the two definitions are the same
GNU_INLINE extern inline int h(int a) {return a;} // expected-note{{previous definition is here}}
int h(short b) {return b;} // expected-error{{conflicting types for 'h'}}

18
clang/test/Sema/inline.c
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@ -1,22 +1,6 @@
// RUN: %clang_cc1 -std=gnu89 -fsyntax-only -verify %s
// RUN: %clang_cc1 -fsyntax-only -verify %s
// Check that we don't allow illegal uses of inline
inline int a; // expected-error{{'inline' can only appear on functions}}
typedef inline int b; // expected-error{{'inline' can only appear on functions}}
int d(inline int a); // expected-error{{'inline' can only appear on functions}}
// PR5253
// GNU Extension: check that we can redefine an extern inline function
extern inline int f(int a) {return a;}
int f(int b) {return b;} // expected-note{{previous definition is here}}
// And now check that we can't redefine a normal function
int f(int c) {return c;} // expected-error{{redefinition of 'f'}}
// Check that we can redefine an extern inline function as a static function
extern inline int g(int a) {return a;}
static int g(int b) {return b;}
// Check that we ensure the types of the two definitions are the same
extern inline int h(int a) {return a;} // expected-note{{previous definition is here}}
int h(short b) {return b;} // expected-error{{conflicting types for 'h'}}