[OPENMP] Codegen for "#pragma omp atomic write"
For global reg lvalue - use regular store through global register.
For simple lvalue - use simple atomic store.
For bitfields, vector element, extended vector elements - the original value of the whole storage (for vector elements) or of some aligned value (for bitfields) is atomically read, the part of this value for the given lvalue is modified and then use atomic compare-and-exchange operation to try to atomically write modified value (if it was not modified).
Also, changes in this patch fix the bug for '#pragma omp atomic read' applied to extended vector elements.
Differential Revision: http://reviews.llvm.org/D7369
llvm-svn: 230736
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index d8bedd7..d4ff708 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -3356,8 +3356,8 @@
auto AtomicBinOp =
dyn_cast<BinaryOperator>(AtomicBody->IgnoreParenImpCasts());
if (AtomicBinOp && AtomicBinOp->getOpcode() == BO_Assign) {
- X = AtomicBinOp->getLHS()->IgnoreParenImpCasts();
- E = AtomicBinOp->getRHS()->IgnoreParenImpCasts();
+ X = AtomicBinOp->getLHS();
+ E = AtomicBinOp->getRHS();
if ((X->isInstantiationDependent() || X->getType()->isScalarType()) &&
(E->isInstantiationDependent() || E->getType()->isScalarType())) {
if (!X->isLValue()) {