faster DCPAnalysis on partial graph

src/PIM/Compiler/PimCompilerOptions.cpp

@@ -47,6 +47,12 @@ llvm::cl::opt<long> coresCount("core-count",
                                llvm::cl::desc("Number of cores in the chip. `-1` to use the minimum amount of cores."),
                                llvm::cl::init(-1));
 
+llvm::cl::opt<size_t> dcpCriticalWindowSize(
+  "dcp-critical-window-size",
+  llvm::cl::desc("Number of lowest-slack virtual nodes considered by each DCP coarsening iteration. "
+                 "Use 0 to run the legacy full-graph DCP analysis."),
+  llvm::cl::init(1024));
+
 llvm::cl::opt<bool>
   ignoreConcatError("ignore-concat-error",
                     llvm::cl::desc("Ignore ConcatOp corner case: do not assert and do a simplification"),