From e77d6e0e4d3989b8cfe6d4be69df4a5c26edde5f Mon Sep 17 00:00:00 2001 From: Carlo Bertolli Date: Fri, 24 Jun 2016 18:53:35 +0000 Subject: [OpenMP] Initial implementation of parse and sema for composite pragma 'distribute parallel for' http://reviews.llvm.org/D21564 This patch is an initial implementation for #distribute parallel for. The main differences that affect other pragmas are: The implementation of 'distribute parallel for' requires blocking of the associated loop, where blocks are "distributed" to different teams and iterations within each block are scheduled to parallel threads within each team. To implement blocking, sema creates two additional worksharing directive fields that are used to pass the team assigned block lower and upper bounds through the outlined function resulting from 'parallel'. In this way, scheduling for 'for' to threads can use those bounds. As a consequence of blocking, the stride of 'distribute' is not 1 but it is equal to the blocking size. This is returned by the runtime and sema prepares a DistIncrExpr variable to hold that value. As a consequence of blocking, the global upper bound (EnsureUpperBound) expression of the 'for' is not the original loop upper bound (e.g. in for(i = 0 ; i < N; i++) this is 'N') but it is the team-assigned block upper bound. Sema creates a new expression holding the calculation of the actual upper bound for 'for' as UB = min(UB, PrevUB), where UB is the loop upper bound, and PrevUB is the team-assigned block upper bound. llvm-svn: 273705 --- clang/lib/AST/StmtPrinter.cpp | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'clang/lib/AST/StmtPrinter.cpp') diff --git a/clang/lib/AST/StmtPrinter.cpp b/clang/lib/AST/StmtPrinter.cpp index 311187b4b39..a05aef9f2ef 100644 --- a/clang/lib/AST/StmtPrinter.cpp +++ b/clang/lib/AST/StmtPrinter.cpp @@ -1153,6 +1153,12 @@ void StmtPrinter::VisitOMPTargetUpdateDirective( PrintOMPExecutableDirective(Node); } +void StmtPrinter::VisitOMPDistributeParallelForDirective( + OMPDistributeParallelForDirective *Node) { + Indent() << "#pragma omp distribute parallel for "; + PrintOMPExecutableDirective(Node); +} + //===----------------------------------------------------------------------===// // Expr printing methods. //===----------------------------------------------------------------------===// -- cgit v1.2.3