================
@@ -15716,6 +15987,489 @@ StmtResult
SemaOpenMP::ActOnOpenMPInterchangeDirective(
buildPreInits(Context, PreInits));
}
+StmtResult SemaOpenMP::ActOnOpenMPFuseDirective(ArrayRef<OMPClause *> Clauses,
+ Stmt *AStmt,
+ SourceLocation StartLoc,
+ SourceLocation EndLoc) {
+
+ ASTContext &Context = getASTContext();
+ DeclContext *CurrContext = SemaRef.CurContext;
+ Scope *CurScope = SemaRef.getCurScope();
+ CaptureVars CopyTransformer(SemaRef);
+
+ // Ensure the structured block is not empty
+ if (!AStmt)
+ return StmtError();
+
+ // Defer transformation in dependent contexts
+ // The NumLoopNests argument is set to a placeholder 1 (even though
+ // using looprange fuse could yield up to 3 top level loop nests)
+ // because a dependent context could prevent determining its true value
+ if (CurrContext->isDependentContext()) {
+ return OMPFuseDirective::Create(Context, StartLoc, EndLoc, Clauses,
+ /* NumLoops */ 1, /* LoopSeqSize */ 1,
+ AStmt, nullptr, nullptr);
+ }
+
+ // Validate that the potential loop sequence is transformable for fusion
+ // Also collect the HelperExprs, Loop Stmts, Inits, and Number of loops
+ LoopSequenceAnalysis SeqAnalysis;
+ if (!checkTransformableLoopSequence(OMPD_fuse, AStmt, SeqAnalysis, Context))
+ return StmtError();
+
+ // SeqAnalysis.LoopSeqSize exists mostly to handle dependent contexts,
+ // otherwise it must be the same as SeqAnalysis.Loops.size().
+ assert(SeqAnalysis.LoopSeqSize == SeqAnalysis.Loops.size());
+
+ // Handle clauses, which can be any of the following: [looprange, apply]
+ const OMPLoopRangeClause *LRC =
----------------
alexey-bataev wrote:
```suggestion
const auto *LRC =
```
https://github.com/llvm/llvm-project/pull/139293
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