[PM] Port ADCE to the new pass manager

llvm-svn: 251725

2 files changed, 39 insertions, 1 deletions

diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 3c2160292d5..7e572232d5b 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -61,7 +61,7 @@ void initializeTarget(PassRegistry&);
 
 void initializeAAEvalPass(PassRegistry&);
 void initializeAddDiscriminatorsPass(PassRegistry&);
-void initializeADCEPass(PassRegistry&);
+void initializeADCELegacyPassPass(PassRegistry&);
 void initializeBDCEPass(PassRegistry&);
 void initializeAliasSetPrinterPass(PassRegistry&);
 void initializeAlwaysInlinerPass(PassRegistry&);
diff --git a/llvm/include/llvm/Transforms/Scalar/ADCE.h b/llvm/include/llvm/Transforms/Scalar/ADCE.h
new file mode 100644
index 00000000000..f9bc7b77c14
--- /dev/null
+++ b/llvm/include/llvm/Transforms/Scalar/ADCE.h
@@ -0,0 +1,38 @@
+//===- ADCE.h - Aggressive dead code elimination --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides the interface for the Aggressive Dead Code Elimination
+// pass. This pass optimistically assumes that all instructions are dead until
+// proven otherwise, allowing it to eliminate dead computations that other DCE
+// passes do not catch, particularly involving loop computations.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_SCALAR_ADCE_H
+#define LLVM_TRANSFORMS_SCALAR_ADCE_H
+
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+/// A DCE pass that assumes instructions are dead until proven otherwise.
+///
+/// This pass eliminates dead code by optimistically assuming that all
+/// instructions are dead until proven otherwise. This allows it to eliminate
+/// dead computations that other DCE passes do not catch, particularly involving
+/// loop computations.
+class ADCEPass {
+public:
+  static StringRef name() { return "ADCEPass"; }
+  PreservedAnalyses run(Function &F);
+};
+}
+
+#endif // LLVM_TRANSFORMS_SCALAR_ADCE_H