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Handle __thread and storage-class-specifiers

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llvm-svn: 38816
This commit is contained in:
Chris Lattner 2006-08-05 03:28:50 +00:00
parent fe533e3ecd
commit f63f89acc2
4 changed files with 84 additions and 17 deletions
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50
clang/Parse/DeclSpec.cpp
View File

@ -21,7 +21,8 @@ using namespace clang;
///
unsigned DeclSpec::getParsedSpecifiers() const {
unsigned Res = 0;
if (StorageClassSpec != SCS_unspecified)
if (StorageClassSpec != SCS_unspecified ||
SCS_thread_specified)
Res |= PQ_StorageClassSpecifier;
if (TypeQualifiers != TQ_unspecified)
@ -33,11 +34,27 @@ unsigned DeclSpec::getParsedSpecifiers() const {
TypeSpecType != TST_unspecified)
Res |= PQ_TypeSpecifier;
if (FuncSpec != FS_unspecified)
if (FS_inline_specified)
Res |= PQ_FunctionSpecifier;
return Res;
}
static const char *getSpecifierName(DeclSpec::SCS S) {
switch (S) {
default: assert(0 && "Unknown typespec!");
case DeclSpec::SCS_unspecified: return "unspecified";
case DeclSpec::SCS_typedef: return "typedef";
case DeclSpec::SCS_extern: return "extern";
case DeclSpec::SCS_static: return "static";
case DeclSpec::SCS_auto: return "auto";
case DeclSpec::SCS_register: return "register";
}
}
static bool BadSpecifier(DeclSpec::SCS S, const char *&PrevSpec) {
PrevSpec = getSpecifierName(S);
return true;
}
static bool BadSpecifier(DeclSpec::TSW W, const char *&PrevSpec) {
switch (W) {
@ -99,6 +116,14 @@ static bool BadSpecifier(DeclSpec::TQ T, const char *&PrevSpec) {
return true;
}
bool DeclSpec::SetStorageClassSpec(SCS S, const char *&PrevSpec) {
if (StorageClassSpec != SCS_unspecified)
return BadSpecifier(StorageClassSpec, PrevSpec);
StorageClassSpec = S;
return false;
}
/// These methods set the specified attribute of the DeclSpec, but return true
/// and ignore the request if invalid (e.g. "extern" then "auto" is
/// specified).
@ -139,12 +164,6 @@ bool DeclSpec::SetTypeQual(TQ T, const char *&PrevSpec,
return false;
}
bool DeclSpec::SetFuncSpec(FS F, const char *&PrevSpec) {
// 'inline inline' is ok.
FuncSpec = F;
return false;
}
/// Finish - This does final analysis of the declspec, rejecting things like
/// "_Imaginary" (lacking an FP type). This returns a diagnostic to issue or
/// diag::NUM_DIAGNOSTICS if there is no error. After calling this method,
@ -196,7 +215,7 @@ void DeclSpec::Finish(SourceLocation Loc, Diagnostic &D,
D.Report(Loc, diag::ext_plain_complex);
TypeSpecType = TST_double; // _Complex -> _Complex double.
} else if (TypeSpecType == TST_int || TypeSpecType == TST_char) {
// Note that GCC doesn't support _Complex _Bool.
// Note that this intentionally doesn't include _Complex _Bool.
D.Report(Loc, diag::ext_integer_complex);
} else if (TypeSpecType != TST_float && TypeSpecType != TST_double) {
D.Report(Loc, diag::err_invalid_complex_spec,
@ -213,5 +232,18 @@ void DeclSpec::Finish(SourceLocation Loc, Diagnostic &D,
// Okay, now we can infer the real type.
// Verify __thread.
if (SCS_thread_specified) {
if (StorageClassSpec == SCS_unspecified) {
StorageClassSpec = SCS_extern; // '__thread int' -> 'extern __thread int'
} else if (StorageClassSpec != SCS_extern &&
StorageClassSpec != SCS_static) {
D.Report(Loc, diag::err_invalid_thread_spec,
getSpecifierName(StorageClassSpec));
SCS_thread_specified = false;
}
}
// 'data definition has no type or storage class'?
}

34
clang/Parse/ParseDecl.cpp
View File

@ -28,7 +28,7 @@ using namespace clang;
/// [C99] function-specifier declaration-specifiers [opt]
/// [GNU] attributes declaration-specifiers [opt] [TODO]
///
/// storage-class-specifier: [C99 6.7.1] [TODO]
/// storage-class-specifier: [C99 6.7.1]
/// 'typedef'
/// 'extern'
/// 'static'
@ -51,6 +51,7 @@ using namespace clang;
/// [GNU] '_Decimal32'
/// [GNU] '_Decimal64'
/// [GNU] '_Decimal128'
/// [GNU] typeof-specifier [TODO]
/// [OBJC] class-name objc-protocol-refs [opt] [TODO]
/// [OBJC] typedef-name objc-protocol-refs [TODO]
/// [OBJC] objc-protocol-refs [TODO]
@ -75,6 +76,34 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS) {
// specifiers. First verify that DeclSpec's are consistent.
DS.Finish(StartLoc, Diags, getLang());
return;
// storage-class-specifier
case tok::kw_typedef:
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, PrevSpec);
break;
case tok::kw_extern:
if (DS.SCS_thread_specified)
Diag(Tok, diag::ext_thread_before, "extern");
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, PrevSpec);
break;
case tok::kw_static:
if (DS.SCS_thread_specified)
Diag(Tok, diag::ext_thread_before, "static");
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, PrevSpec);
break;
case tok::kw_auto:
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, PrevSpec);
break;
case tok::kw_register:
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, PrevSpec);
break;
case tok::kw___thread:
if (DS.SCS_thread_specified)
isInvalid = 2, PrevSpec = "__thread";
else
DS.SCS_thread_specified = true;
break;
// type-specifiers
case tok::kw_short:
isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, PrevSpec);
@ -144,7 +173,8 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS) {
// function-specifier
case tok::kw_inline:
isInvalid = DS.SetFuncSpec(DeclSpec::FS_inline, PrevSpec);
// 'inline inline' is ok.
DS.FS_inline_specified = true;
break;
}
// If the specifier combination wasn't legal, issue a diagnostic.

4
clang/include/clang/Basic/DiagnosticKinds.def
View File

@ -247,6 +247,8 @@ DIAG(ext_plain_complex, EXTENSION,
"ISO C does not support plain '_Complex' meaning '_Complex double'")
DIAG(ext_integer_complex, EXTENSION,
"ISO C does not support complex integer types")
DIAG(ext_thread_before, EXTENSION,
"'__thread' before 'static'")
DIAG(err_invalid_decl_spec_combination, ERROR,
"cannot combine with previous '%s' declaration specifier")
@ -260,5 +262,7 @@ DIAG(err_invalid_longlong_spec, ERROR,
"'long long %s' is invalid")
DIAG(err_invalid_complex_spec, ERROR,
"'_Complex %s' is invalid")
DIAG(err_invalid_thread_spec, ERROR,
"'__thread %s' is invalid")
#undef DIAG

13
clang/include/clang/Parse/DeclSpec.h
View File

@ -36,6 +36,9 @@ public:
SCS_register
} StorageClassSpec : 3;
// storage-class-specifier
bool SCS_thread_specified : 1;
// type-specifier
enum TSW {
TSW_unspecified,
@ -79,10 +82,7 @@ public:
unsigned TypeQualifiers : 3; // Bitwise OR of typequals.
// function-specifier
enum FS {
FS_unspecified,
FS_inline
} FuncSpec : 1;
bool FS_inline_specified : 1;
// attributes.
// FIXME: implement declspec attributes.
@ -98,12 +98,13 @@ public:
DeclSpec()
: StorageClassSpec(SCS_unspecified),
SCS_thread_specified(false),
TypeSpecWidth(TSW_unspecified),
TypeSpecComplex(TSC_unspecified),
TypeSpecSign(TSS_unspecified),
TypeSpecType(TST_unspecified),
TypeQualifiers(TSS_unspecified),
FuncSpec(FS_unspecified) {
FS_inline_specified(false) {
}
/// getParsedSpecifiers - Return a bitmask of which flavors of specifiers this
@ -114,11 +115,11 @@ public:
/// These methods set the specified attribute of the DeclSpec, but return true
/// and ignore the request if invalid (e.g. "extern" then "auto" is
/// specified). The name of the previous specifier is returned in prevspec.
bool SetStorageClassSpec(SCS S, const char *&PrevSpec);
bool SetTypeSpecWidth(TSW W, const char *&PrevSpec);
bool SetTypeSpecComplex(TSC C, const char *&PrevSpec);
bool SetTypeSpecSign(TSS S, const char *&PrevSpec);
bool SetTypeSpecType(TST T, const char *&PrevSpec);
bool SetFuncSpec(FS F, const char *&PrevSpec);
bool SetTypeQual(TQ T, const char *&PrevSpec, const LangOptions &Lang);