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[OPENMP] Added table with allowed nesting info for OpenMP regions (per request from Samuel F Antao). 

llvm-svn: 212034
This commit is contained in:
Alexey Bataev 2014-06-30 10:22:46 +00:00
parent e3b7839bfc
commit 18eb25e85b
1 changed files with 46 additions and 0 deletions
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46
clang/lib/Sema/SemaOpenMP.cpp
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@ -971,6 +971,52 @@ void Sema::ActOnOpenMPRegionStart(OpenMPDirectiveKind DKind, Scope *CurScope) {
bool CheckNestingOfRegions(Sema &SemaRef, DSAStackTy *Stack,
OpenMPDirectiveKind CurrentRegion,
SourceLocation StartLoc) {
// Allowed nesting of constructs
// +------------------+-----------------+------------------------------------+
// | Parent directive | Child directive | Closely (!), No-Closely(+), Both(*)|
// +------------------+-----------------+------------------------------------+
// | parallel | parallel | * |
// | parallel | for | * |
// | parallel | simd | * |
// | parallel | sections | * |
// | parallel | section | + |
// | parallel | single | * |
// +------------------+-----------------+------------------------------------+
// | for | parallel | * |
// | for | for | + |
// | for | simd | * |
// | for | sections | + |
// | for | section | + |
// | for | single | + |
// +------------------+-----------------+------------------------------------+
// | simd | parallel | |
// | simd | for | |
// | simd | simd | |
// | simd | sections | |
// | simd | section | |
// | simd | single | |
// +------------------+-----------------+------------------------------------+
// | sections | parallel | * |
// | sections | for | + |
// | sections | simd | * |
// | sections | sections | + |
// | sections | section | * |
// | sections | single | + |
// +------------------+-----------------+------------------------------------+
// | section | parallel | * |
// | section | for | + |
// | section | simd | * |
// | section | sections | + |
// | section | section | + |
// | section | single | + |
// +------------------+-----------------+------------------------------------+
// | single | parallel | * |
// | single | for | + |
// | single | simd | * |
// | single | sections | + |
// | single | section | + |
// | single | single | + |
// +------------------+-----------------+------------------------------------+
if (Stack->getCurScope()) {
auto ParentRegion = Stack->getParentDirective();
bool NestingProhibited = false;