Make "LowerToCFG" an operation pass

The conversion from the Loops dialect to the Standard dialect, also known as
loop-to-cfg lowering, has been historically a function pass. It can be required
on non-Standard function Ops, in particular the recently introduced GPU
functions. Make the conversion an operation pass instead of a function pass.

PiperOrigin-RevId: 285814560

1 files changed, 2 insertions, 3 deletions

diff --git a/mlir/include/mlir/Conversion/LoopToStandard/ConvertLoopToStandard.h b/mlir/include/mlir/Conversion/LoopToStandard/ConvertLoopToStandard.h
index e44e723376f..095c9f470b3 100644
--- a/mlir/include/mlir/Conversion/LoopToStandard/ConvertLoopToStandard.h
+++ b/mlir/include/mlir/Conversion/LoopToStandard/ConvertLoopToStandard.h
@@ -22,10 +22,9 @@
 #include <vector>
 
 namespace mlir {
-class FuncOp;
 struct LogicalResult;
 class MLIRContext;
-template <typename T> class OpPassBase;
+class Pass;
 class RewritePattern;
 
 // Owning list of rewriting patterns.
@@ -38,7 +37,7 @@ void populateLoopToStdConversionPatterns(OwningRewritePatternList &patterns,
                                          MLIRContext *ctx);
 
 /// Creates a pass to convert loop.for, loop.if and loop.terminator ops to CFG.
-std::unique_ptr<OpPassBase<FuncOp>> createLowerToCFGPass();
+std::unique_ptr<Pass> createLowerToCFGPass();
 
 } // namespace mlir