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minix/external/bsd/llvm/dist/clang/lib/Parse/ParsePragma.cpp

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Importing netbsd clang -- pristine Change-Id: Ia40e9ffdf29b5dab2f122f673ff6802a58bc690f
2013-11-15 13:00:54 +01:00
//===--- ParsePragma.cpp - Language specific pragma parsing ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the language specific #pragma handlers.
//
//===----------------------------------------------------------------------===//
#include "ParsePragma.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Parse/ParseDiagnostic.h"
#include "clang/Parse/Parser.h"
#include "clang/Sema/Scope.h"
#include "llvm/ADT/StringSwitch.h"
using namespace clang;
/// \brief Handle the annotation token produced for #pragma unused(...)
///
/// Each annot_pragma_unused is followed by the argument token so e.g.
/// "#pragma unused(x,y)" becomes:
/// annot_pragma_unused 'x' annot_pragma_unused 'y'
void Parser::HandlePragmaUnused() {
assert(Tok.is(tok::annot_pragma_unused));
SourceLocation UnusedLoc = ConsumeToken();
Actions.ActOnPragmaUnused(Tok, getCurScope(), UnusedLoc);
ConsumeToken(); // The argument token.
}
void Parser::HandlePragmaVisibility() {
assert(Tok.is(tok::annot_pragma_vis));
const IdentifierInfo *VisType =
static_cast<IdentifierInfo *>(Tok.getAnnotationValue());
SourceLocation VisLoc = ConsumeToken();
Actions.ActOnPragmaVisibility(VisType, VisLoc);
}
struct PragmaPackInfo {
Sema::PragmaPackKind Kind;
IdentifierInfo *Name;
Token Alignment;
SourceLocation LParenLoc;
SourceLocation RParenLoc;
};
void Parser::HandlePragmaPack() {
assert(Tok.is(tok::annot_pragma_pack));
PragmaPackInfo *Info =
static_cast<PragmaPackInfo *>(Tok.getAnnotationValue());
SourceLocation PragmaLoc = ConsumeToken();
ExprResult Alignment;
if (Info->Alignment.is(tok::numeric_constant)) {
Alignment = Actions.ActOnNumericConstant(Info->Alignment);
if (Alignment.isInvalid())
return;
}
Actions.ActOnPragmaPack(Info->Kind, Info->Name, Alignment.get(), PragmaLoc,
Info->LParenLoc, Info->RParenLoc);
}
void Parser::HandlePragmaMSStruct() {
assert(Tok.is(tok::annot_pragma_msstruct));
Sema::PragmaMSStructKind Kind =
static_cast<Sema::PragmaMSStructKind>(
reinterpret_cast<uintptr_t>(Tok.getAnnotationValue()));
Actions.ActOnPragmaMSStruct(Kind);
ConsumeToken(); // The annotation token.
}
void Parser::HandlePragmaAlign() {
assert(Tok.is(tok::annot_pragma_align));
Sema::PragmaOptionsAlignKind Kind =
static_cast<Sema::PragmaOptionsAlignKind>(
reinterpret_cast<uintptr_t>(Tok.getAnnotationValue()));
SourceLocation PragmaLoc = ConsumeToken();
Actions.ActOnPragmaOptionsAlign(Kind, PragmaLoc);
}
void Parser::HandlePragmaWeak() {
assert(Tok.is(tok::annot_pragma_weak));
SourceLocation PragmaLoc = ConsumeToken();
Actions.ActOnPragmaWeakID(Tok.getIdentifierInfo(), PragmaLoc,
Tok.getLocation());
ConsumeToken(); // The weak name.
}
void Parser::HandlePragmaWeakAlias() {
assert(Tok.is(tok::annot_pragma_weakalias));
SourceLocation PragmaLoc = ConsumeToken();
IdentifierInfo *WeakName = Tok.getIdentifierInfo();
SourceLocation WeakNameLoc = Tok.getLocation();
ConsumeToken();
IdentifierInfo *AliasName = Tok.getIdentifierInfo();
SourceLocation AliasNameLoc = Tok.getLocation();
ConsumeToken();
Actions.ActOnPragmaWeakAlias(WeakName, AliasName, PragmaLoc,
WeakNameLoc, AliasNameLoc);
}
void Parser::HandlePragmaRedefineExtname() {
assert(Tok.is(tok::annot_pragma_redefine_extname));
SourceLocation RedefLoc = ConsumeToken();
IdentifierInfo *RedefName = Tok.getIdentifierInfo();
SourceLocation RedefNameLoc = Tok.getLocation();
ConsumeToken();
IdentifierInfo *AliasName = Tok.getIdentifierInfo();
SourceLocation AliasNameLoc = Tok.getLocation();
ConsumeToken();
Actions.ActOnPragmaRedefineExtname(RedefName, AliasName, RedefLoc,
RedefNameLoc, AliasNameLoc);
}
void Parser::HandlePragmaFPContract() {
assert(Tok.is(tok::annot_pragma_fp_contract));
tok::OnOffSwitch OOS =
static_cast<tok::OnOffSwitch>(
reinterpret_cast<uintptr_t>(Tok.getAnnotationValue()));
Actions.ActOnPragmaFPContract(OOS);
ConsumeToken(); // The annotation token.
}
StmtResult Parser::HandlePragmaCaptured()
{
assert(Tok.is(tok::annot_pragma_captured));
ConsumeToken();
if (Tok.isNot(tok::l_brace)) {
PP.Diag(Tok, diag::err_expected_lbrace);
return StmtError();
}
SourceLocation Loc = Tok.getLocation();
ParseScope CapturedRegionScope(this, Scope::FnScope | Scope::DeclScope);
Actions.ActOnCapturedRegionStart(Loc, getCurScope(), CR_Default,
/*NumParams=*/1);
StmtResult R = ParseCompoundStatement();
CapturedRegionScope.Exit();
if (R.isInvalid()) {
Actions.ActOnCapturedRegionError();
return StmtError();
}
return Actions.ActOnCapturedRegionEnd(R.get());
}
namespace {
typedef llvm::PointerIntPair<IdentifierInfo *, 1, bool> OpenCLExtData;
}
void Parser::HandlePragmaOpenCLExtension() {
assert(Tok.is(tok::annot_pragma_opencl_extension));
OpenCLExtData data =
OpenCLExtData::getFromOpaqueValue(Tok.getAnnotationValue());
unsigned state = data.getInt();
IdentifierInfo *ename = data.getPointer();
SourceLocation NameLoc = Tok.getLocation();
ConsumeToken(); // The annotation token.
OpenCLOptions &f = Actions.getOpenCLOptions();
// OpenCL 1.1 9.1: "The all variant sets the behavior for all extensions,
// overriding all previously issued extension directives, but only if the
// behavior is set to disable."
if (state == 0 && ename->isStr("all")) {
#define OPENCLEXT(nm) f.nm = 0;
#include "clang/Basic/OpenCLExtensions.def"
}
#define OPENCLEXT(nm) else if (ename->isStr(#nm)) { f.nm = state; }
#include "clang/Basic/OpenCLExtensions.def"
else {
PP.Diag(NameLoc, diag::warn_pragma_unknown_extension) << ename;
return;
}
}
// #pragma GCC visibility comes in two variants:
// 'push' '(' [visibility] ')'
// 'pop'
void PragmaGCCVisibilityHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &VisTok) {
SourceLocation VisLoc = VisTok.getLocation();
Token Tok;
PP.LexUnexpandedToken(Tok);
const IdentifierInfo *PushPop = Tok.getIdentifierInfo();
const IdentifierInfo *VisType;
if (PushPop && PushPop->isStr("pop")) {
VisType = 0;
} else if (PushPop && PushPop->isStr("push")) {
PP.LexUnexpandedToken(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen)
<< "visibility";
return;
}
PP.LexUnexpandedToken(Tok);
VisType = Tok.getIdentifierInfo();
if (!VisType) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
<< "visibility";
return;
}
PP.LexUnexpandedToken(Tok);
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_rparen)
<< "visibility";
return;
}
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
<< "visibility";
return;
}
PP.LexUnexpandedToken(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol)
<< "visibility";
return;
}
Token *Toks = new Token[1];
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_vis);
Toks[0].setLocation(VisLoc);
Toks[0].setAnnotationValue(
const_cast<void*>(static_cast<const void*>(VisType)));
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/true);
}
// #pragma pack(...) comes in the following delicious flavors:
// pack '(' [integer] ')'
// pack '(' 'show' ')'
// pack '(' ('push' | 'pop') [',' identifier] [, integer] ')'
void PragmaPackHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &PackTok) {
SourceLocation PackLoc = PackTok.getLocation();
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "pack";
return;
}
Sema::PragmaPackKind Kind = Sema::PPK_Default;
IdentifierInfo *Name = 0;
Token Alignment;
Alignment.startToken();
SourceLocation LParenLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Tok;
PP.Lex(Tok);
// In MSVC/gcc, #pragma pack(4) sets the alignment without affecting
// the push/pop stack.
// In Apple gcc, #pragma pack(4) is equivalent to #pragma pack(push, 4)
if (PP.getLangOpts().ApplePragmaPack)
Kind = Sema::PPK_Push;
} else if (Tok.is(tok::identifier)) {
const IdentifierInfo *II = Tok.getIdentifierInfo();
if (II->isStr("show")) {
Kind = Sema::PPK_Show;
PP.Lex(Tok);
} else {
if (II->isStr("push")) {
Kind = Sema::PPK_Push;
} else if (II->isStr("pop")) {
Kind = Sema::PPK_Pop;
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_invalid_action);
return;
}
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Tok;
PP.Lex(Tok);
} else if (Tok.is(tok::identifier)) {
Name = Tok.getIdentifierInfo();
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.isNot(tok::numeric_constant)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
Alignment = Tok;
PP.Lex(Tok);
}
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
}
}
} else if (PP.getLangOpts().ApplePragmaPack) {
// In MSVC/gcc, #pragma pack() resets the alignment without affecting
// the push/pop stack.
// In Apple gcc #pragma pack() is equivalent to #pragma pack(pop).
Kind = Sema::PPK_Pop;
}
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_rparen) << "pack";
return;
}
SourceLocation RParenLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) << "pack";
return;
}
PragmaPackInfo *Info =
(PragmaPackInfo*) PP.getPreprocessorAllocator().Allocate(
sizeof(PragmaPackInfo), llvm::alignOf<PragmaPackInfo>());
new (Info) PragmaPackInfo();
Info->Kind = Kind;
Info->Name = Name;
Info->Alignment = Alignment;
Info->LParenLoc = LParenLoc;
Info->RParenLoc = RParenLoc;
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 1, llvm::alignOf<Token>());
new (Toks) Token();
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_pack);
Toks[0].setLocation(PackLoc);
Toks[0].setAnnotationValue(static_cast<void*>(Info));
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/false);
}
// #pragma ms_struct on
// #pragma ms_struct off
void PragmaMSStructHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &MSStructTok) {
Sema::PragmaMSStructKind Kind = Sema::PMSST_OFF;
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_ms_struct);
return;
}
const IdentifierInfo *II = Tok.getIdentifierInfo();
if (II->isStr("on")) {
Kind = Sema::PMSST_ON;
PP.Lex(Tok);
}
else if (II->isStr("off") || II->isStr("reset"))
PP.Lex(Tok);
else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_ms_struct);
return;
}
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol)
<< "ms_struct";
return;
}
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 1, llvm::alignOf<Token>());
new (Toks) Token();
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_msstruct);
Toks[0].setLocation(MSStructTok.getLocation());
Toks[0].setAnnotationValue(reinterpret_cast<void*>(
static_cast<uintptr_t>(Kind)));
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/false);
}
// #pragma 'align' '=' {'native','natural','mac68k','power','reset'}
// #pragma 'options 'align' '=' {'native','natural','mac68k','power','reset'}
static void ParseAlignPragma(Preprocessor &PP, Token &FirstTok,
bool IsOptions) {
Token Tok;
if (IsOptions) {
PP.Lex(Tok);
if (Tok.isNot(tok::identifier) ||
!Tok.getIdentifierInfo()->isStr("align")) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_options_expected_align);
return;
}
}
PP.Lex(Tok);
if (Tok.isNot(tok::equal)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_align_expected_equal)
<< IsOptions;
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
<< (IsOptions ? "options" : "align");
return;
}
Sema::PragmaOptionsAlignKind Kind = Sema::POAK_Natural;
const IdentifierInfo *II = Tok.getIdentifierInfo();
if (II->isStr("native"))
Kind = Sema::POAK_Native;
else if (II->isStr("natural"))
Kind = Sema::POAK_Natural;
else if (II->isStr("packed"))
Kind = Sema::POAK_Packed;
else if (II->isStr("power"))
Kind = Sema::POAK_Power;
else if (II->isStr("mac68k"))
Kind = Sema::POAK_Mac68k;
else if (II->isStr("reset"))
Kind = Sema::POAK_Reset;
else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_align_invalid_option)
<< IsOptions;
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol)
<< (IsOptions ? "options" : "align");
return;
}
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 1, llvm::alignOf<Token>());
new (Toks) Token();
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_align);
Toks[0].setLocation(FirstTok.getLocation());
Toks[0].setAnnotationValue(reinterpret_cast<void*>(
static_cast<uintptr_t>(Kind)));
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/false);
}
void PragmaAlignHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &AlignTok) {
ParseAlignPragma(PP, AlignTok, /*IsOptions=*/false);
}
void PragmaOptionsHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &OptionsTok) {
ParseAlignPragma(PP, OptionsTok, /*IsOptions=*/true);
}
// #pragma unused(identifier)
void PragmaUnusedHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &UnusedTok) {
// FIXME: Should we be expanding macros here? My guess is no.
SourceLocation UnusedLoc = UnusedTok.getLocation();
// Lex the left '('.
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "unused";
return;
}
// Lex the declaration reference(s).
SmallVector<Token, 5> Identifiers;
SourceLocation RParenLoc;
bool LexID = true;
while (true) {
PP.Lex(Tok);
if (LexID) {
if (Tok.is(tok::identifier)) {
Identifiers.push_back(Tok);
LexID = false;
continue;
}
// Illegal token!
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_var);
return;
}
// We are execting a ')' or a ','.
if (Tok.is(tok::comma)) {
LexID = true;
continue;
}
if (Tok.is(tok::r_paren)) {
RParenLoc = Tok.getLocation();
break;
}
// Illegal token!
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_punc);
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) <<
"unused";
return;
}
// Verify that we have a location for the right parenthesis.
assert(RParenLoc.isValid() && "Valid '#pragma unused' must have ')'");
assert(!Identifiers.empty() && "Valid '#pragma unused' must have arguments");
// For each identifier token, insert into the token stream a
// annot_pragma_unused token followed by the identifier token.
// This allows us to cache a "#pragma unused" that occurs inside an inline
// C++ member function.
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 2 * Identifiers.size(), llvm::alignOf<Token>());
for (unsigned i=0; i != Identifiers.size(); i++) {
Token &pragmaUnusedTok = Toks[2*i], &idTok = Toks[2*i+1];
pragmaUnusedTok.startToken();
pragmaUnusedTok.setKind(tok::annot_pragma_unused);
pragmaUnusedTok.setLocation(UnusedLoc);
idTok = Identifiers[i];
}
PP.EnterTokenStream(Toks, 2*Identifiers.size(),
/*DisableMacroExpansion=*/true, /*OwnsTokens=*/false);
}
// #pragma weak identifier
// #pragma weak identifier '=' identifier
void PragmaWeakHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &WeakTok) {
SourceLocation WeakLoc = WeakTok.getLocation();
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier) << "weak";
return;
}
Token WeakName = Tok;
bool HasAlias = false;
Token AliasName;
PP.Lex(Tok);
if (Tok.is(tok::equal)) {
HasAlias = true;
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
<< "weak";
return;
}
AliasName = Tok;
PP.Lex(Tok);
}
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) << "weak";
return;
}
if (HasAlias) {
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 3, llvm::alignOf<Token>());
Token &pragmaUnusedTok = Toks[0];
pragmaUnusedTok.startToken();
pragmaUnusedTok.setKind(tok::annot_pragma_weakalias);
pragmaUnusedTok.setLocation(WeakLoc);
Toks[1] = WeakName;
Toks[2] = AliasName;
PP.EnterTokenStream(Toks, 3,
/*DisableMacroExpansion=*/true, /*OwnsTokens=*/false);
} else {
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 2, llvm::alignOf<Token>());
Token &pragmaUnusedTok = Toks[0];
pragmaUnusedTok.startToken();
pragmaUnusedTok.setKind(tok::annot_pragma_weak);
pragmaUnusedTok.setLocation(WeakLoc);
Toks[1] = WeakName;
PP.EnterTokenStream(Toks, 2,
/*DisableMacroExpansion=*/true, /*OwnsTokens=*/false);
}
}
// #pragma redefine_extname identifier identifier
void PragmaRedefineExtnameHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &RedefToken) {
SourceLocation RedefLoc = RedefToken.getLocation();
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier) <<
"redefine_extname";
return;
}
Token RedefName = Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
<< "redefine_extname";
return;
}
Token AliasName = Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) <<
"redefine_extname";
return;
}
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 3, llvm::alignOf<Token>());
Token &pragmaRedefTok = Toks[0];
pragmaRedefTok.startToken();
pragmaRedefTok.setKind(tok::annot_pragma_redefine_extname);
pragmaRedefTok.setLocation(RedefLoc);
Toks[1] = RedefName;
Toks[2] = AliasName;
PP.EnterTokenStream(Toks, 3,
/*DisableMacroExpansion=*/true, /*OwnsTokens=*/false);
}
void
PragmaFPContractHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &Tok) {
tok::OnOffSwitch OOS;
if (PP.LexOnOffSwitch(OOS))
return;
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 1, llvm::alignOf<Token>());
new (Toks) Token();
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_fp_contract);
Toks[0].setLocation(Tok.getLocation());
Toks[0].setAnnotationValue(reinterpret_cast<void*>(
static_cast<uintptr_t>(OOS)));
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/false);
}
void
PragmaOpenCLExtensionHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &Tok) {
PP.LexUnexpandedToken(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier) <<
"OPENCL";
return;
}
IdentifierInfo *ename = Tok.getIdentifierInfo();
SourceLocation NameLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::colon)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_colon) << ename;
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_enable_disable);
return;
}
IdentifierInfo *op = Tok.getIdentifierInfo();
unsigned state;
if (op->isStr("enable")) {
state = 1;
} else if (op->isStr("disable")) {
state = 0;
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_enable_disable);
return;
}
SourceLocation StateLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) <<
"OPENCL EXTENSION";
return;
}
OpenCLExtData data(ename, state);
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 1, llvm::alignOf<Token>());
new (Toks) Token();
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_opencl_extension);
Toks[0].setLocation(NameLoc);
Toks[0].setAnnotationValue(data.getOpaqueValue());
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/false);
if (PP.getPPCallbacks())
PP.getPPCallbacks()->PragmaOpenCLExtension(NameLoc, ename,
StateLoc, state);
}
/// \brief Handle '#pragma omp ...' when OpenMP is disabled.
///
void
PragmaNoOpenMPHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &FirstTok) {
if (PP.getDiagnostics().getDiagnosticLevel(diag::warn_pragma_omp_ignored,
FirstTok.getLocation()) !=
DiagnosticsEngine::Ignored) {
PP.Diag(FirstTok, diag::warn_pragma_omp_ignored);
PP.getDiagnostics().setDiagnosticMapping(diag::warn_pragma_omp_ignored,
diag::MAP_IGNORE,
SourceLocation());
}
PP.DiscardUntilEndOfDirective();
}
/// \brief Handle '#pragma omp ...' when OpenMP is enabled.
///
void
PragmaOpenMPHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &FirstTok) {
SmallVector<Token, 16> Pragma;
Token Tok;
Tok.startToken();
Tok.setKind(tok::annot_pragma_openmp);
Tok.setLocation(FirstTok.getLocation());
while (Tok.isNot(tok::eod)) {
Pragma.push_back(Tok);
PP.Lex(Tok);
}
SourceLocation EodLoc = Tok.getLocation();
Tok.startToken();
Tok.setKind(tok::annot_pragma_openmp_end);
Tok.setLocation(EodLoc);
Pragma.push_back(Tok);
Token *Toks = new Token[Pragma.size()];
std::copy(Pragma.begin(), Pragma.end(), Toks);
PP.EnterTokenStream(Toks, Pragma.size(),
/*DisableMacroExpansion=*/true, /*OwnsTokens=*/true);
}
/// \brief Handle the Microsoft \#pragma detect_mismatch extension.
///
/// The syntax is:
/// \code
/// #pragma detect_mismatch("name", "value")
/// \endcode
/// Where 'name' and 'value' are quoted strings. The values are embedded in
/// the object file and passed along to the linker. If the linker detects a
/// mismatch in the object file's values for the given name, a LNK2038 error
/// is emitted. See MSDN for more details.
void PragmaDetectMismatchHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &Tok) {
SourceLocation CommentLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(CommentLoc, diag::err_expected_lparen);
return;
}
// Read the name to embed, which must be a string literal.
std::string NameString;
if (!PP.LexStringLiteral(Tok, NameString,
"pragma detect_mismatch",
/*MacroExpansion=*/true))
return;
// Read the comma followed by a second string literal.
std::string ValueString;
if (Tok.isNot(tok::comma)) {
PP.Diag(Tok.getLocation(), diag::err_pragma_detect_mismatch_malformed);
return;
}
if (!PP.LexStringLiteral(Tok, ValueString, "pragma detect_mismatch",
/*MacroExpansion=*/true))
return;
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::err_expected_rparen);
return;
}
PP.Lex(Tok); // Eat the r_paren.
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::err_pragma_detect_mismatch_malformed);
return;
}
// If the pragma is lexically sound, notify any interested PPCallbacks.
if (PP.getPPCallbacks())
PP.getPPCallbacks()->PragmaDetectMismatch(CommentLoc, NameString,
ValueString);
Actions.ActOnPragmaDetectMismatch(NameString, ValueString);
}
/// \brief Handle the microsoft \#pragma comment extension.
///
/// The syntax is:
/// \code
/// #pragma comment(linker, "foo")
/// \endcode
/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user.
/// "foo" is a string, which is fully macro expanded, and permits string
/// concatenation, embedded escape characters etc. See MSDN for more details.
void PragmaCommentHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &Tok) {
SourceLocation CommentLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(CommentLoc, diag::err_pragma_comment_malformed);
return;
}
// Read the identifier.
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(CommentLoc, diag::err_pragma_comment_malformed);
return;
}
// Verify that this is one of the 5 whitelisted options.
IdentifierInfo *II = Tok.getIdentifierInfo();
Sema::PragmaMSCommentKind Kind =
llvm::StringSwitch<Sema::PragmaMSCommentKind>(II->getName())
.Case("linker", Sema::PCK_Linker)
.Case("lib", Sema::PCK_Lib)
.Case("compiler", Sema::PCK_Compiler)
.Case("exestr", Sema::PCK_ExeStr)
.Case("user", Sema::PCK_User)
.Default(Sema::PCK_Unknown);
if (Kind == Sema::PCK_Unknown) {
PP.Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind);
return;
}
// Read the optional string if present.
PP.Lex(Tok);
std::string ArgumentString;
if (Tok.is(tok::comma) && !PP.LexStringLiteral(Tok, ArgumentString,
"pragma comment",
/*MacroExpansion=*/true))
return;
// FIXME: warn that 'exestr' is deprecated.
// FIXME: If the kind is "compiler" warn if the string is present (it is
// ignored).
// The MSDN docs say that "lib" and "linker" require a string and have a short
// whitelist of linker options they support, but in practice MSVC doesn't
// issue a diagnostic. Therefore neither does clang.
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
return;
}
PP.Lex(Tok); // eat the r_paren.
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
return;
}
// If the pragma is lexically sound, notify any interested PPCallbacks.
if (PP.getPPCallbacks())
PP.getPPCallbacks()->PragmaComment(CommentLoc, II, ArgumentString);
Actions.ActOnPragmaMSComment(Kind, ArgumentString);
}
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