remove the old pass

Author: Hardcode84

mlir/include/mlir/Dialect/Arith/Transforms/Passes.h

@@ -82,11 +82,6 @@ void populateIntRangeNarrowingPatterns(RewritePatternSet &patterns,
                                        DataFlowSolver &solver,
                                        ArrayRef<unsigned> bitwidthsSupported);
 
-// TODO: merge these two narrowing passes.
-/// Add patterns for integer bitwidth narrowing.
-void populateArithIntNarrowingPatterns(RewritePatternSet &patterns,
-                                       const ArithIntNarrowingOptions &options);
-
 //===----------------------------------------------------------------------===//
 // Registration
 //===----------------------------------------------------------------------===//

mlir/include/mlir/Dialect/Arith/Transforms/Passes.td

@@ -111,18 +111,4 @@ def ArithEmulateWideInt : Pass<"arith-emulate-wide-int"> {
   let dependentDialects = ["vector::VectorDialect"];
 }
 
-def ArithIntNarrowing : Pass<"arith-int-narrowing"> {
-  let summary = "Reduce integer operation bitwidth";
-  let description = [{
-    Reduce bitwidths of integer types used in arith operations. This pass
-    prefers the narrowest available integer bitwidths that are guaranteed to
-    produce the same results.
-  }];
-  let dependentDialects = ["vector::VectorDialect"];
-  let options = [
-    ListOption<"bitwidthsSupported", "int-bitwidths-supported", "unsigned",
-               "Integer bitwidths supported">,
-  ];
- }
-
 #endif // MLIR_DIALECT_ARITH_TRANSFORMS_PASSES

mlir/lib/Dialect/Arith/Transforms/CMakeLists.txt

@@ -6,7 +6,6 @@ add_mlir_dialect_library(MLIRArithTransforms
   EmulateWideInt.cpp
   EmulateNarrowType.cpp
   ExpandOps.cpp
-  IntNarrowing.cpp
   IntRangeOptimizations.cpp
   ReifyValueBounds.cpp
   UnsignedWhenEquivalent.cpp