[OPENMP] Improve performance of the hasDSA() function, NFC.
Remove some unneccesary code from the function after the fix for ASAN
buildbots.
llvm-svn: 301547
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 9c6948b..9a19023 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -824,23 +824,18 @@
if (isStackEmpty())
return {};
D = getCanonicalDecl(D);
- auto StartI = std::next(Stack.back().first.rbegin());
+ auto I = (FromParent && Stack.back().first.size() > 1)
+ ? std::next(Stack.back().first.rbegin())
+ : Stack.back().first.rbegin();
auto EndI = Stack.back().first.rend();
- if (FromParent && StartI != EndI)
- StartI = std::next(StartI);
- if (StartI == EndI)
- return {};
- auto I = std::prev(StartI);
do {
- ++I;
- if (I == EndI)
- break;
+ std::advance(I, 1);
if (!DPred(I->Directive) && !isParallelOrTaskRegion(I->Directive))
continue;
DSAVarData DVar = getDSA(I, D);
if (CPred(DVar.CKind))
return DVar;
- } while (I != EndI);
+ } while (std::distance(I, EndI) > 1);
return {};
}