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For -Wignored-qualifiers, don't warn on qualifiers which we acquire via a 

typedef. Also don't warn on the _Atomic type specifier, just on the _Atomic
type qualifier.

llvm-svn: 178218
This commit is contained in:
Richard Smith 2013-03-28 03:27:52 +00:00
parent 8bff9616ef
commit 8ea9720b90
3 changed files with 12 additions and 7 deletions
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11
clang/lib/Sema/SemaType.cpp
View File

@ -1888,7 +1888,9 @@ static void diagnoseIgnoredQualifiers(
SourceLocation VolatileQualLoc = SourceLocation(),
SourceLocation RestrictQualLoc = SourceLocation(),
SourceLocation AtomicQualLoc = SourceLocation()) {
assert(Quals && "no qualifiers to diagnose");
if (!Quals)
return;
const SourceManager &SM = S.getSourceManager();
struct Qual {
@ -1933,12 +1935,10 @@ static void diagnoseIgnoredQualifiers(
static void diagnoseIgnoredFunctionQualifiers(Sema &S, QualType RetTy,
Declarator &D,
unsigned FunctionChunkIndex) {
unsigned AtomicQual = RetTy->isAtomicType() ? DeclSpec::TQ_atomic : 0;
if (D.getTypeObject(FunctionChunkIndex).Fun.hasTrailingReturnType()) {
// FIXME: TypeSourceInfo doesn't preserve location information for
// qualifiers.
diagnoseIgnoredQualifiers(S, RetTy.getCVRQualifiers() | AtomicQual,
diagnoseIgnoredQualifiers(S, RetTy.getLocalCVRQualifiers(),
D.getIdentifierLoc());
return;
}
@ -1970,6 +1970,7 @@ static void diagnoseIgnoredFunctionQualifiers(Sema &S, QualType RetTy,
case DeclaratorChunk::MemberPointer:
// FIXME: We can't currently provide an accurate source location and a
// fix-it hint for these.
unsigned AtomicQual = RetTy->isAtomicType() ? DeclSpec::TQ_atomic : 0;
diagnoseIgnoredQualifiers(S, RetTy.getCVRQualifiers() | AtomicQual,
D.getIdentifierLoc());
return;
@ -1986,7 +1987,7 @@ static void diagnoseIgnoredFunctionQualifiers(Sema &S, QualType RetTy,
// Just parens all the way out to the decl specifiers. Diagnose any qualifiers
// which are present there.
diagnoseIgnoredQualifiers(S, D.getDeclSpec().getTypeQualifiers() | AtomicQual,
diagnoseIgnoredQualifiers(S, D.getDeclSpec().getTypeQualifiers(),
D.getIdentifierLoc(),
D.getDeclSpec().getConstSpecLoc(),
D.getDeclSpec().getVolatileSpecLoc(),

5
clang/test/Sema/return.c
View File

@ -244,6 +244,11 @@ const int ignored_c_quals(); // expected-warning{{'const' type qualifier on retu
const volatile int ignored_cv_quals(); // expected-warning{{'const volatile' type qualifiers on return type have no effect}}
char* const volatile restrict ignored_cvr_quals(); // expected-warning{{'const volatile restrict' type qualifiers on return type have no effect}}
typedef const int CI;
CI ignored_quals_typedef();
const CI ignored_quals_typedef_2(); // expected-warning{{'const' type qualifier}}
// Test that for switch(enum) that if the switch statement covers all the cases
// that we don't consider that for -Wreturn-type.
enum Cases { C1, C2, C3, C4 };

3
clang/test/SemaCXX/return.cpp
View File

@ -55,8 +55,7 @@ mixed_ret(); // expected-warning {{'volatile' type qualifier on return type has
const int volatile // expected-warning {{'const volatile' type qualifiers on return type have no effect}}
(((parens())));
_Atomic(int)
atomic(); // expected-warning {{'_Atomic' type qualifier on return type has no effect}}
_Atomic(int) atomic();
_Atomic // expected-warning {{'_Atomic' type qualifier on return type has no effect}}
int