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[OpenMP] Fix handling of clause on wrong directive, by Joel. E. Denny 

Summary:
First, this patch fixes an assert failure when, for example, "omp for"
has num_teams.

Second, this patch prevents duplicate diagnostics when, for example,
"omp for" has uniform.

This patch makes the general assumption (even where it doesn't
necessarily fix an existing bug) that it is worthless to perform sema
for a clause that appears on a directive on which OpenMP does not
permit that clause.  However, due to this assumption, this patch
suppresses some diagnostics that were expected in the test suite.  I
assert that those diagnostics were likely just distracting to the
user.

Reviewers: ABataev

Reviewed By: ABataev

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D41841

llvm-svn: 322107
This commit is contained in:
Alexey Bataev 2018-01-09 19:21:04 +00:00
parent 771ec9f399
commit f3c832a970
8 changed files with 67 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
clang/include/clang/Parse/Parser.h
View File

@ -2675,30 +2675,42 @@ private:
/// \brief Parses clause with a single expression of a kind \a Kind.
///
/// \param Kind Kind of current clause.
/// \param ParseOnly true to skip the clause's semantic actions and return
/// nullptr.
///
OMPClause *ParseOpenMPSingleExprClause(OpenMPClauseKind Kind);
OMPClause *ParseOpenMPSingleExprClause(OpenMPClauseKind Kind,
bool ParseOnly);
/// \brief Parses simple clause of a kind \a Kind.
///
/// \param Kind Kind of current clause.
/// \param ParseOnly true to skip the clause's semantic actions and return
/// nullptr.
///
OMPClause *ParseOpenMPSimpleClause(OpenMPClauseKind Kind);
OMPClause *ParseOpenMPSimpleClause(OpenMPClauseKind Kind, bool ParseOnly);
/// \brief Parses clause with a single expression and an additional argument
/// of a kind \a Kind.
///
/// \param Kind Kind of current clause.
/// \param ParseOnly true to skip the clause's semantic actions and return
/// nullptr.
///
OMPClause *ParseOpenMPSingleExprWithArgClause(OpenMPClauseKind Kind);
OMPClause *ParseOpenMPSingleExprWithArgClause(OpenMPClauseKind Kind,
bool ParseOnly);
/// \brief Parses clause without any additional arguments.
///
/// \param Kind Kind of current clause.
/// \param ParseOnly true to skip the clause's semantic actions and return
/// nullptr.
///
OMPClause *ParseOpenMPClause(OpenMPClauseKind Kind);
OMPClause *ParseOpenMPClause(OpenMPClauseKind Kind, bool ParseOnly = false);
/// \brief Parses clause with the list of variables of a kind \a Kind.
///
/// \param Kind Kind of current clause.
/// \param ParseOnly true to skip the clause's semantic actions and return
/// nullptr.
///
OMPClause *ParseOpenMPVarListClause(OpenMPDirectiveKind DKind,
OpenMPClauseKind Kind);
OpenMPClauseKind Kind, bool ParseOnly);
public:
/// Parses simple expression in parens for single-expression clauses of OpenMP

43
clang/lib/Parse/ParseOpenMP.cpp
View File

@ -1205,11 +1205,13 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
OpenMPClauseKind CKind, bool FirstClause) {
OMPClause *Clause = nullptr;
bool ErrorFound = false;
bool WrongDirective = false;
// Check if clause is allowed for the given directive.
if (CKind != OMPC_unknown && !isAllowedClauseForDirective(DKind, CKind)) {
Diag(Tok, diag::err_omp_unexpected_clause) << getOpenMPClauseName(CKind)
<< getOpenMPDirectiveName(DKind);
ErrorFound = true;
WrongDirective = true;
}
switch (CKind) {
@ -1253,9 +1255,9 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
}
if (CKind == OMPC_ordered && PP.LookAhead(/*N=*/0).isNot(tok::l_paren))
Clause = ParseOpenMPClause(CKind);
Clause = ParseOpenMPClause(CKind, WrongDirective);
else
Clause = ParseOpenMPSingleExprClause(CKind);
Clause = ParseOpenMPSingleExprClause(CKind, WrongDirective);
break;
case OMPC_default:
case OMPC_proc_bind:
@ -1270,7 +1272,7 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
ErrorFound = true;
}
Clause = ParseOpenMPSimpleClause(CKind);
Clause = ParseOpenMPSimpleClause(CKind, WrongDirective);
break;
case OMPC_schedule:
case OMPC_dist_schedule:
@ -1287,7 +1289,7 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
LLVM_FALLTHROUGH;
case OMPC_if:
Clause = ParseOpenMPSingleExprWithArgClause(CKind);
Clause = ParseOpenMPSingleExprWithArgClause(CKind, WrongDirective);
break;
case OMPC_nowait:
case OMPC_untied:
@ -1310,7 +1312,7 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
ErrorFound = true;
}
Clause = ParseOpenMPClause(CKind);
Clause = ParseOpenMPClause(CKind, WrongDirective);
break;
case OMPC_private:
case OMPC_firstprivate:
@ -1330,7 +1332,7 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
case OMPC_from:
case OMPC_use_device_ptr:
case OMPC_is_device_ptr:
Clause = ParseOpenMPVarListClause(DKind, CKind);
Clause = ParseOpenMPVarListClause(DKind, CKind, WrongDirective);
break;
case OMPC_unknown:
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
@ -1339,8 +1341,9 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
break;
case OMPC_threadprivate:
case OMPC_uniform:
Diag(Tok, diag::err_omp_unexpected_clause) << getOpenMPClauseName(CKind)
<< getOpenMPDirectiveName(DKind);
if (!WrongDirective)
Diag(Tok, diag::err_omp_unexpected_clause)
<< getOpenMPClauseName(CKind) << getOpenMPDirectiveName(DKind);
SkipUntil(tok::comma, tok::annot_pragma_openmp_end, StopBeforeMatch);
break;
}
@ -1400,7 +1403,8 @@ ExprResult Parser::ParseOpenMPParensExpr(StringRef ClauseName,
/// hint-clause:
/// 'hint' '(' expression ')'
///
OMPClause *Parser::ParseOpenMPSingleExprClause(OpenMPClauseKind Kind) {
OMPClause *Parser::ParseOpenMPSingleExprClause(OpenMPClauseKind Kind,
bool ParseOnly) {
SourceLocation Loc = ConsumeToken();
SourceLocation LLoc = Tok.getLocation();
SourceLocation RLoc;
@ -1410,6 +1414,8 @@ OMPClause *Parser::ParseOpenMPSingleExprClause(OpenMPClauseKind Kind) {
if (Val.isInvalid())
return nullptr;
if (ParseOnly)
return nullptr;
return Actions.ActOnOpenMPSingleExprClause(Kind, Val.get(), Loc, LLoc, RLoc);
}
@ -1421,7 +1427,8 @@ OMPClause *Parser::ParseOpenMPSingleExprClause(OpenMPClauseKind Kind) {
/// proc_bind-clause:
/// 'proc_bind' '(' 'master' | 'close' | 'spread' ')
///
OMPClause *Parser::ParseOpenMPSimpleClause(OpenMPClauseKind Kind) {
OMPClause *Parser::ParseOpenMPSimpleClause(OpenMPClauseKind Kind,
bool ParseOnly) {
SourceLocation Loc = Tok.getLocation();
SourceLocation LOpen = ConsumeToken();
// Parse '('.
@ -1440,6 +1447,8 @@ OMPClause *Parser::ParseOpenMPSimpleClause(OpenMPClauseKind Kind) {
// Parse ')'.
T.consumeClose();
if (ParseOnly)
return nullptr;
return Actions.ActOnOpenMPSimpleClause(Kind, Type, TypeLoc, LOpen, Loc,
Tok.getLocation());
}
@ -1470,10 +1479,12 @@ OMPClause *Parser::ParseOpenMPSimpleClause(OpenMPClauseKind Kind) {
/// nogroup-clause:
/// 'nogroup'
///
OMPClause *Parser::ParseOpenMPClause(OpenMPClauseKind Kind) {
OMPClause *Parser::ParseOpenMPClause(OpenMPClauseKind Kind, bool ParseOnly) {
SourceLocation Loc = Tok.getLocation();
ConsumeAnyToken();
if (ParseOnly)
return nullptr;
return Actions.ActOnOpenMPClause(Kind, Loc, Tok.getLocation());
}
@ -1491,7 +1502,8 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPClauseKind Kind) {
/// defaultmap:
/// 'defaultmap' '(' modifier ':' kind ')'
///
OMPClause *Parser::ParseOpenMPSingleExprWithArgClause(OpenMPClauseKind Kind) {
OMPClause *Parser::ParseOpenMPSingleExprWithArgClause(OpenMPClauseKind Kind,
bool ParseOnly) {
SourceLocation Loc = ConsumeToken();
SourceLocation DelimLoc;
// Parse '('.
@ -1613,6 +1625,8 @@ OMPClause *Parser::ParseOpenMPSingleExprWithArgClause(OpenMPClauseKind Kind) {
if (NeedAnExpression && Val.isInvalid())
return nullptr;
if (ParseOnly)
return nullptr;
return Actions.ActOnOpenMPSingleExprWithArgClause(
Kind, Arg, Val.get(), Loc, T.getOpenLocation(), KLoc, DelimLoc,
T.getCloseLocation());
@ -1940,7 +1954,8 @@ bool Parser::ParseOpenMPVarList(OpenMPDirectiveKind DKind,
/// modifier(list)
/// where modifier is 'val' (C) or 'ref', 'val' or 'uval'(C++).
OMPClause *Parser::ParseOpenMPVarListClause(OpenMPDirectiveKind DKind,
OpenMPClauseKind Kind) {
OpenMPClauseKind Kind,
bool ParseOnly) {
SourceLocation Loc = Tok.getLocation();
SourceLocation LOpen = ConsumeToken();
SmallVector<Expr *, 4> Vars;
@ -1949,6 +1964,8 @@ OMPClause *Parser::ParseOpenMPVarListClause(OpenMPDirectiveKind DKind,
if (ParseOpenMPVarList(DKind, Kind, Vars, Data))
return nullptr;
if (ParseOnly)
return nullptr;
return Actions.ActOnOpenMPVarListClause(
Kind, Vars, Data.TailExpr, Loc, LOpen, Data.ColonLoc, Tok.getLocation(),
Data.ReductionIdScopeSpec, Data.ReductionId, Data.DepKind, Data.LinKind,

4
clang/test/OpenMP/distribute_simd_loop_messages.cpp
View File

@ -324,9 +324,7 @@ int test_iteration_spaces() {
#pragma omp target
#pragma omp teams
// expected-error@+3 {{unexpected OpenMP clause 'shared' in directive '#pragma omp distribute simd'}}
// expected-note@+2 {{defined as shared}}
// expected-error@+2 {{loop iteration variable in the associated loop of 'omp distribute simd' directive may not be shared, predetermined as linear}}
// expected-error@+1 {{unexpected OpenMP clause 'shared' in directive '#pragma omp distribute simd'}}
#pragma omp distribute simd shared(ii)
for (ii = 0; ii < 10; ii++)
c[ii] = a[ii];

14
clang/test/OpenMP/for_misc_messages.c
View File

@ -54,6 +54,20 @@ void test_invalid_clause() {
#pragma omp for foo bar
for (i = 0; i < 16; ++i)
;
// At one time, this failed an assert.
// expected-error@+1 {{unexpected OpenMP clause 'num_teams' in directive '#pragma omp for'}}
#pragma omp for num_teams(3)
for (i = 0; i < 16; ++i)
;
// At one time, this error was reported twice.
// expected-error@+1 {{unexpected OpenMP clause 'uniform' in directive '#pragma omp for'}}
#pragma omp for uniform
for (i = 0; i < 16; ++i)
;
// expected-error@+1 {{unexpected OpenMP clause 'if' in directive '#pragma omp for'}}
#pragma omp for if(0)
for (i = 0; i < 16; ++i)
;
}
void test_non_identifiers() {

2
clang/test/OpenMP/parallel_messages.cpp
View File

@ -31,6 +31,8 @@ int main(int argc, char **argv) {
foo();
L1:
foo();
#pragma omp parallel ordered // expected-error {{unexpected OpenMP clause 'ordered' in directive '#pragma omp parallel'}}
;
#pragma omp parallel
;
#pragma omp parallel

4
clang/test/OpenMP/simd_loop_messages.cpp
View File

@ -236,9 +236,7 @@ int test_iteration_spaces() {
for (ii = 0; ii < 10; ii++)
c[ii] = a[ii];
// expected-error@+3 {{unexpected OpenMP clause 'shared' in directive '#pragma omp simd'}}
// expected-note@+2 {{defined as shared}}
// expected-error@+2 {{loop iteration variable in the associated loop of 'omp simd' directive may not be shared, predetermined as linear}}
// expected-error@+1 {{unexpected OpenMP clause 'shared' in directive '#pragma omp simd'}}
#pragma omp simd shared(ii)
for (ii = 0; ii < 10; ii++)
c[ii] = a[ii];

2
clang/test/OpenMP/target_teams_distribute_simd_messages.cpp
View File

@ -64,7 +64,7 @@ L1:
// expected-error@+1 {{unexpected OpenMP clause 'default' in directive '#pragma omp target teams distribute simd'}}
#pragma omp target teams distribute simd default(none)
for (int i = 0; i < 10; ++i)
++argc; // expected-error {{ariable 'argc' must have explicitly specified data sharing attributes}}
++argc;
goto L2; // expected-error {{use of undeclared label 'L2'}}
#pragma omp target teams distribute simd

4
clang/test/OpenMP/taskloop_loop_messages.cpp
View File

@ -294,10 +294,8 @@ int test_iteration_spaces() {
c[ii] = a[ii];
#pragma omp parallel
// expected-error@+2 {{unexpected OpenMP clause 'linear' in directive '#pragma omp taskloop'}}
// expected-note@+1 {{defined as linear}}
// expected-error@+1 {{unexpected OpenMP clause 'linear' in directive '#pragma omp taskloop'}}
#pragma omp taskloop linear(ii)
// expected-error@+1 {{loop iteration variable in the associated loop of 'omp taskloop' directive may not be linear, predetermined as private}}
for (ii = 0; ii < 10; ii++)
c[ii] = a[ii];