r276167 - [OpenMP] Ignore parens in atomic capture

[Kelvin Li via cfe-commits]

Author: kli
Date: Wed Jul 20 14:41:17 2016
New Revision: 276167

URL: http://llvm.org/viewvc/llvm-project?rev=276167&view=rev
Log:
[OpenMP] Ignore parens in atomic capture

Clang misdiagnoses atomic captures cases that contains parens.
i.e.

  int v, int *p;
#pragma omp atomic capture
{ v = (*p); (*p)++; }

Patch by David S.

Differential Revision: https://reviews.llvm.org/D22487

Modified:
    cfe/trunk/lib/Sema/SemaOpenMP.cpp
    cfe/trunk/test/OpenMP/atomic_messages.c
    cfe/trunk/test/OpenMP/atomic_messages.cpp

Modified: cfe/trunk/lib/Sema/SemaOpenMP.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaOpenMP.cpp?rev=276167&r1=276166&r2=276167&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaOpenMP.cpp (original)
+++ cfe/trunk/lib/Sema/SemaOpenMP.cpp Wed Jul 20 14:41:17 2016
@@ -6163,7 +6163,7 @@ bool OpenMPAtomicUpdateChecker::checkSta
             AtomicCompAssignOp->getOpcode());
         OpLoc = AtomicCompAssignOp->getOperatorLoc();
         E = AtomicCompAssignOp->getRHS();
-        X = AtomicCompAssignOp->getLHS();
+        X = AtomicCompAssignOp->getLHS()->IgnoreParens();
         IsXLHSInRHSPart = true;
       } else if (auto *AtomicBinOp = dyn_cast<BinaryOperator>(
                      AtomicBody->IgnoreParenImpCasts())) {
@@ -6177,7 +6177,7 @@ bool OpenMPAtomicUpdateChecker::checkSta
           IsPostfixUpdate = AtomicUnaryOp->isPostfix();
           Op = AtomicUnaryOp->isIncrementOp() ? BO_Add : BO_Sub;
           OpLoc = AtomicUnaryOp->getOperatorLoc();
-          X = AtomicUnaryOp->getSubExpr();
+          X = AtomicUnaryOp->getSubExpr()->IgnoreParens();
           E = SemaRef.ActOnIntegerConstant(OpLoc, /*uint64_t Val=*/1).get();
           IsXLHSInRHSPart = true;
         } else {

Modified: cfe/trunk/test/OpenMP/atomic_messages.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/OpenMP/atomic_messages.c?rev=276167&r1=276166&r2=276167&view=diff
==============================================================================
--- cfe/trunk/test/OpenMP/atomic_messages.c (original)
+++ cfe/trunk/test/OpenMP/atomic_messages.c Wed Jul 20 14:41:17 2016
@@ -313,6 +313,8 @@ int captureint() {
 #pragma omp atomic capture
   {c = a; a++;}
 #pragma omp atomic capture
+  {c = a; (a)++;}
+#pragma omp atomic capture
   {++a;c = a;}
 #pragma omp atomic capture
   {c = a;a--;}
@@ -321,6 +323,8 @@ int captureint() {
 #pragma omp atomic capture
   {c = a; a += b;}
 #pragma omp atomic capture
+  {c = a; (a) += b;}
+#pragma omp atomic capture
   {a %= b; c = a;}
 #pragma omp atomic capture
   {c = a; a *= b;}

Modified: cfe/trunk/test/OpenMP/atomic_messages.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/OpenMP/atomic_messages.cpp?rev=276167&r1=276166&r2=276167&view=diff
==============================================================================
--- cfe/trunk/test/OpenMP/atomic_messages.cpp (original)
+++ cfe/trunk/test/OpenMP/atomic_messages.cpp Wed Jul 20 14:41:17 2016
@@ -453,6 +453,8 @@ T capture() {
 #pragma omp atomic capture
   {c = a; a++;}
 #pragma omp atomic capture
+  {c = a; (a)++;}
+#pragma omp atomic capture
   {++a;c = a;}
 #pragma omp atomic capture
   {c = a;a--;}
@@ -461,6 +463,8 @@ T capture() {
 #pragma omp atomic capture
   {c = a; a += b;}
 #pragma omp atomic capture
+  {c = a; (a) += b;}
+#pragma omp atomic capture
   {a %= b; c = a;}
 #pragma omp atomic capture
   {c = a; a *= b;}