fix ya.make

1 files changed, 53 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/tools/llvm-reduce/deltas/ReduceAliases.cpp b/contrib/libs/llvm12/tools/llvm-reduce/deltas/ReduceAliases.cpp
new file mode 100644
index 0000000000..41be4baa98
--- /dev/null
+++ b/contrib/libs/llvm12/tools/llvm-reduce/deltas/ReduceAliases.cpp
@@ -0,0 +1,53 @@
+//===- ReduceAliases.cpp - Specialized Delta Pass -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements a function which calls the Generic Delta pass in order
+// to reduce aliases in the provided Module.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ReduceAliases.h"
+#include "Delta.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/GlobalValue.h"
+
+using namespace llvm;
+
+/// Removes all aliases aren't inside any of the
+/// desired Chunks.
+static void extractAliasesFromModule(const std::vector<Chunk> &ChunksToKeep,
+                                     Module *Program) {
+  Oracle O(ChunksToKeep);
+
+  for (auto &GA : make_early_inc_range(Program->aliases())) {
+    if (!O.shouldKeep()) {
+      GA.replaceAllUsesWith(GA.getAliasee());
+      GA.eraseFromParent();
+    }
+  }
+}
+
+/// Counts the amount of aliases and prints their respective name & index.
+static int countAliases(Module *Program) {
+  // TODO: Silence index with --quiet flag
+  errs() << "----------------------------\n";
+  errs() << "Aliases Index Reference:\n";
+  int Count = 0;
+  for (auto &GA : Program->aliases())
+    errs() << "\t" << ++Count << ": " << GA.getName() << "\n";
+
+  errs() << "----------------------------\n";
+  return Count;
+}
+
+void llvm::reduceAliasesDeltaPass(TestRunner &Test) {
+  errs() << "*** Reducing Aliases ...\n";
+  int Functions = countAliases(Test.getProgram());
+  runDeltaPass(Test, Functions, extractAliasesFromModule);
+  errs() << "----------------------------\n";
+}