clang::Decl* InsiemeSema::ActOnFinishFunctionBody(clang::Decl* Decl, clang::Stmt* Body) {
VLOG(2) << "{InsiemeSema}: ActOnFinishFunctionBody()";
clang::Decl* ret = Sema::ActOnFinishFunctionBody(Decl, std::move(Body));
// We are sure all the pragmas inside the function body have been matched
FunctionDecl* FD = dyn_cast<FunctionDecl>(ret);
if(!FD) { return ret; }
PragmaList matched;
std::list<PragmaPtr>::reverse_iterator I = pimpl->pending_pragma.rbegin(), E = pimpl->pending_pragma.rend();
while(I != E && isAfterRange(FD->getSourceRange(), (*I)->getStartLocation(), SourceMgr)) {
++I;
}
while(I != E) {
unsigned int pragmaEnd = utils::Line((*I)->getEndLocation(), SourceMgr);
unsigned int declBegin = utils::Line(ret->getSourceRange().getBegin(), SourceMgr);
if(pragmaEnd <= declBegin) {
(*I)->setDecl(FD);
matched.push_back(*I);
}
++I;
}
EraseMatchedPragmas(pimpl->pending_pragma, matched);
isInsideFunctionDef = false;
return ret;
}
void InsiemeSema::matchStmt(clang::Stmt* S, const clang::SourceRange& bounds, const clang::SourceManager& sm, PragmaList& matched) {
for(PragmaFilter filter(bounds, sm, pimpl->pending_pragma); *filter; ++filter) {
PragmaPtr&& P = *filter;
P->setStatement(S);
matched.push_back(P);
}
}
SgNodeHelper::PragmaList
SgNodeHelper::collectPragmaLines(string pragmaName,SgNode* root) {
PragmaList l;
RoseAst ast(root);
for(RoseAst::iterator i=ast.begin();i!=ast.end();++i) {
std::list<SgPragmaDeclaration*> pragmaNodes;
ROSE_ASSERT(pragmaNodes.size()==0);
// SgPragmaDeclaration(SgPragma),..., SgStatement
// collects consecutive pragma declarations
while(i!=ast.end()&&(isSgPragmaDeclaration(*i)||isSgPragma(*i))) {
if(SgPragmaDeclaration* pragmaDecl=isSgPragmaDeclaration(*i)) {
pragmaNodes.push_back(pragmaDecl);
}
++i;
}
if(i!=ast.end()) {
for(std::list<SgPragmaDeclaration*>::iterator p=pragmaNodes.begin();p!=pragmaNodes.end();++p) {
string str=SgNodeHelper::getPragmaDeclarationString(*p);
SgNodeHelper::replaceString(str,"#pragma ","");
if(SgNodeHelper::isPrefix(pragmaName,str)) {
SgPragmaDeclaration* lastPragmaDecl=pragmaNodes.back();
// ensure we did not collect pragmas at the end of a block
if(!(isLastChildOf(lastPragmaDecl,lastPragmaDecl->get_parent()))) {
if(SgStatement* assocStmt=isSgStatement(*i)) {
SgNodeHelper::replaceString(str,pragmaName+" ","");
//cout<<"PRAGMA REVERSE: "<<str<<" : "<<(assocStmt)->unparseToString()<<endl;
l.push_back(make_pair(str,assocStmt));
} else {
std::cerr<<"Error: "<<SgNodeHelper::sourceLineColumnToString(*p)<<": reverse pragma not associated with a method or statement."<<endl
<<"Pragma : "<<str<<endl
<<"Associated code: "<<assocStmt->unparseToString()<<endl;
exit(1);
}
} else {
std::cerr<<"Error: "<<SgNodeHelper::sourceLineColumnToString(*p)<<": pragma at end of block. This is not allowed."<<endl;
exit(1);
}
}
}
}
}
return l;
}
void InsiemeSema::ActOnTagFinishDefinition(clang::Scope* S, clang::Decl* TagDecl, clang::SourceLocation RBraceLoc) {
VLOG(2) << "{InsiemeSema}: ActOnTagFinishDefinition()";
Sema::ActOnTagFinishDefinition(S, TagDecl, RBraceLoc);
if(isInsideFunctionDef) { return; }
PragmaList matched;
std::list<PragmaPtr>::reverse_iterator I = pimpl->pending_pragma.rbegin(), E = pimpl->pending_pragma.rend();
while(I != E && isAfterRange(TagDecl->getSourceRange(), (*I)->getStartLocation(), SourceMgr)) {
++I;
}
while(I != E) {
(*I)->setDecl(TagDecl);
matched.push_back(*I);
++I;
}
EraseMatchedPragmas(pimpl->pending_pragma, matched);
}
clang::Decl* InsiemeSema::ActOnDeclarator(clang::Scope* S, clang::Declarator& D) {
VLOG(2) << "{InsiemeSema}: ActOnDeclarator()";
clang::Decl* ret = Sema::ActOnDeclarator(S, D);
if(isInsideFunctionDef) { return ret; }
PragmaList matched;
std::list<PragmaPtr>::reverse_iterator I = pimpl->pending_pragma.rbegin(), E = pimpl->pending_pragma.rend();
while(I != E && isAfterRange(ret->getSourceRange(), (*I)->getStartLocation(), SourceMgr)) {
++I;
}
while(I != E) {
(*I)->setDecl(ret);
matched.push_back(*I);
++I;
}
EraseMatchedPragmas(pimpl->pending_pragma, matched);
return ret;
}
clang::StmtResult InsiemeSema::ActOnCompoundStmt(clang::SourceLocation L, clang::SourceLocation R, llvm::ArrayRef<clang::Stmt*> Elts, bool isStmtExpr) {
// we parse the original code segment, within the original locations
StmtResult&& ret = Sema::ActOnCompoundStmt(L, R, std::move(Elts), isStmtExpr);
clang::CompoundStmt* CS = cast<clang::CompoundStmt>(ret.get());
// This is still buggy as of Clang 3.6.2:
// when pragmas are just after the beginning of a compound stmt, example:
// {
// #pragma xxx
// ...
// }
// the location of the opening bracket is wrong because of a bug in the clang parser.
//
// We solve the problem by searching for the bracket in the input stream and overwrite
// the value of L (which contains the wrong location) with the correct value.
enum { MacroIDBit = 1U << 31 }; // from clang/Basic/SourceLocation.h for use with cpp classes
{
SourceLocation&& leftBracketLoc = SourceMgr.getImmediateSpellingLoc(L);
std::pair<FileID, unsigned>&& locInfo = SourceMgr.getDecomposedLoc(leftBracketLoc);
llvm::StringRef&& buffer = SourceMgr.getBufferData(locInfo.first);
const char* strData = buffer.begin() + locInfo.second;
char const* lBracePos = strbchr(strData, buffer.begin(), '{');
// We know the location of the left bracket, we overwrite the value of L with the correct location
// but only if the location is valid as in getFileLocWithOffset() in SourceLocation
if((((leftBracketLoc.getRawEncoding() & ~MacroIDBit) + (lBracePos - strData)) & MacroIDBit) == 0) {
L = leftBracketLoc.getLocWithOffset(lBracePos - strData);
}
}
// For the right bracket, we start at the final statement in the compound
// (or its start if it is empty) and search forward until we find the first "}"
// Otherwise, cases such as this:
//
// {
// bla();
// }
// #pragma test expect_ir(R"( {} )")
//
// will be broken
{
SourceLocation rightBracketLoc;
if(CS->size() == 0) {
rightBracketLoc = SourceMgr.getImmediateSpellingLoc(L);
} else {
rightBracketLoc = SourceMgr.getImmediateSpellingLoc(CS->body_back()->getLocEnd());
}
std::pair<FileID, unsigned>&& locInfo = SourceMgr.getDecomposedLoc(rightBracketLoc);
llvm::StringRef buffer = SourceMgr.getBufferData(locInfo.first);
const char* strData = buffer.begin() + locInfo.second;
char const* rBracePos = strchr(strData, '}');
// We know the location of the right bracket, we overwrite the value of R with the correct location
if((((rightBracketLoc.getRawEncoding() & ~MacroIDBit) + (rBracePos - strData)) & MacroIDBit) == 0) {
R = rightBracketLoc.getLocWithOffset(rBracePos - strData);
}
}
// the source range we inspect is defined by the new source locations,
// this fix the problem with boundaries jumping to the beginning of the file in
// the macro expansions:
//
// #define F(x) { }
//
// ...
//
// F(r) // <-this statement will jum to the macro location
//
PragmaList matched;
SourceRange SR(L, R);
// for each of the pragmas in the range between brackets
for(PragmaFilter&& filter = PragmaFilter(SR, SourceMgr, pimpl->pending_pragma); *filter; ++filter) {
PragmaPtr P = *filter;
unsigned int pragmaStart = utils::Line(P->getStartLocation(), SourceMgr);
unsigned int pragmaEnd = utils::Line(P->getEndLocation(), SourceMgr);
bool found = false;
// problem with first pragma, compound start is delayed until fist usable line (first stmt)
if(CS->size() > 0) {
for(clang::CompoundStmt::body_iterator it = CS->body_begin(); it != CS->body_end(); ++it) {
unsigned int stmtStart = (Line((*it)->getLocStart(), SourceMgr));
if((pragmaEnd <= stmtStart)) {
// ACHTUNG: if the node is a nullStmt, and is not at the end of the compound (in
// which case is most probably ours) we can not trust it. semantics wont change,
// we move one more. (BUG: nullStmt followed by pragmas, the source begin is
// postponed until next stmt) this makes pragmas to be attached to a previous
// stmt
if(!llvm::isa<clang::NullStmt>(*it)) {
// this pragma is attached to the current stmt
P->setStatement(*it);
matched.push_back(P);
found = true;
break;
}
}
}
}
if(!found && pragmaStart <= utils::Line(R, SourceMgr)) {
// this is a de-attached pragma (barrier i.e.) at the end of the compound
// we need to create a fake NullStmt ( ; ) to attach this
Stmt** stmts = new Stmt*[CS->size() + 1];
ArrayRef<clang::Stmt*> stmtList(stmts, CS->size() + 1);
clang::CompoundStmt* newCS =
new(Context) clang::CompoundStmt(Context, stmtList, CS->getSourceRange().getBegin(), CS->getSourceRange().getEnd());
std::copy(CS->body_begin(), CS->body_end(), newCS->body_begin());
std::for_each(CS->body_begin(), CS->body_end(), [&](Stmt*& curr) { this->Context.Deallocate(curr); });
newCS->setLastStmt(new(Context) NullStmt(SourceLocation()));
P->setStatement(*newCS->body_rbegin());
matched.push_back(P);
// transfer the ownership of the statement
clang::CompoundStmt* oldStmt = ret.getAs<clang::CompoundStmt>();
oldStmt->setStmts(Context, NULL, 0);
ret = newCS;
CS = newCS;
// destroy the old compound stmt
Context.Deallocate(oldStmt);
delete[] stmts;
}
}
// remove matched pragmas
EraseMatchedPragmas(pimpl->pending_pragma, matched);
return std::move(ret);
}