Remove badly outdated comment (The pass did have important positive e…

…ffect once used right.)

devito/operator/xdsl_operator.py

@@ -50,7 +50,6 @@
 
 MLIR_CPU_PIPELINE = '"builtin.module(canonicalize, cse, loop-invariant-code-motion, canonicalize, cse, loop-invariant-code-motion,cse,canonicalize,fold-memref-alias-ops,expand-strided-metadata, loop-invariant-code-motion,lower-affine,convert-scf-to-cf,convert-math-to-llvm,convert-func-to-llvm{use-bare-ptr-memref-call-conv},finalize-memref-to-llvm,canonicalize,cse)"'
 MLIR_OPENMP_PIPELINE = '"builtin.module(canonicalize, cse, loop-invariant-code-motion, fold-memref-alias-ops, loop-invariant-code-motion, lower-affine, finalize-memref-to-llvm, loop-invariant-code-motion, canonicalize, cse, convert-scf-to-openmp, finalize-memref-to-llvm, convert-scf-to-cf, convert-func-to-llvm{use-bare-ptr-memref-call-conv}, convert-openmp-to-llvm, convert-math-to-llvm, reconcile-unrealized-casts, canonicalize, cse)"'
-# gpu-launch-sink-index-computations seemed to have no impact
 MLIR_GPU_PIPELINE = lambda block_sizes: f'"builtin.module(test-math-algebraic-simplification,scf-parallel-loop-tiling{{parallel-loop-tile-sizes={block_sizes}}},func.func(gpu-map-parallel-loops),convert-parallel-loops-to-gpu,lower-affine, canonicalize,cse, fold-memref-alias-ops, gpu-launch-sink-index-computations, gpu-kernel-outlining, canonicalize{{region-simplify}},cse,fold-memref-alias-ops,expand-strided-metadata,lower-affine,canonicalize,cse,func.func(gpu-async-region),canonicalize,cse,convert-arith-to-llvm{{index-bitwidth=64}},convert-scf-to-cf,convert-cf-to-llvm{{index-bitwidth=64}},canonicalize,cse,convert-func-to-llvm{{use-bare-ptr-memref-call-conv}},gpu.module(convert-gpu-to-nvvm,reconcile-unrealized-casts,canonicalize,gpu-to-cubin),gpu-to-llvm,canonicalize,cse)"'
 
 XDSL_CPU_PIPELINE = lambda nb_tiled_dims: f'"stencil-shape-inference,convert-stencil-to-ll-mlir{{tile-sizes={",".join(["64"]*nb_tiled_dims)}}},printf-to-llvm"'