[OPENMP50]Full handling of atomic_default_mem_order in requires
directive.
According to OpenMP 5.0, The atomic_default_mem_order clause specifies the default memory ordering behavior for atomic constructs that must be provided by an implementation. If the default memory ordering is specified as seq_cst, all atomic constructs on which memory-order-clause is not specified behave as if the seq_cst clause appears. If the default memory ordering is specified as relaxed, all atomic constructs on which memory-order-clause is not specified behave as if the relaxed clause appears.
If the default memory ordering is specified as acq_rel, atomic constructs on which memory-order-clause is not specified behave as if the release clause appears if the atomic write or atomic update operation is specified, as if the acquire clause appears if the atomic read operation is specified, and as if the acq_rel clause appears if the atomic captured update operation is specified.
diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.h b/clang/lib/CodeGen/CGOpenMPRuntime.h
index a4fe15e..f559e0d 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntime.h
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.h
@@ -26,6 +26,7 @@
#include "llvm/Frontend/OpenMP/OMPConstants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/ValueHandle.h"
+#include "llvm/Support/AtomicOrdering.h"
namespace llvm {
class ArrayType;
@@ -704,6 +705,9 @@
/// directive is present.
bool HasRequiresUnifiedSharedMemory = false;
+ /// Atomic ordering from the omp requires directive.
+ llvm::AtomicOrdering RequiresAtomicOrdering = llvm::AtomicOrdering::Monotonic;
+
/// Flag for keeping track of weather a target region has been emitted.
bool HasEmittedTargetRegion = false;
@@ -1700,7 +1704,10 @@
/// Perform check on requires decl to ensure that target architecture
/// supports unified addressing
- virtual void checkArchForUnifiedAddressing(const OMPRequiresDecl *D);
+ virtual void processRequiresDirective(const OMPRequiresDecl *D);
+
+ /// Gets default memory ordering as specified in requires directive.
+ llvm::AtomicOrdering getDefaultMemoryOrdering() const;
/// Checks if the variable has associated OMPAllocateDeclAttr attribute with
/// the predefined allocator and translates it into the corresponding address
