[GlobalSplit] Port to the new pass manager.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287511 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Transforms/IPO/GlobalSplit.h

@@ -0,0 +1,30 @@
+//===- GlobalSplit.h - global variable splitter -----------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass uses inrange annotations on GEP indices to split globals where
+// beneficial. Clang currently attaches these annotations to references to
+// virtual table globals under the Itanium ABI for the benefit of the
+// whole-program virtual call optimization and control flow integrity passes.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_IPO_GLOBALSPLIT_H
+#define LLVM_TRANSFORMS_IPO_GLOBALSPLIT_H
+
+#include "llvm/IR/Module.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+/// Pass to perform split of global variables.
+class GlobalSplitPass : public PassInfoMixin<GlobalSplitPass> {
+public:
+  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+};
+}
+#endif // LLVM_TRANSFORMS_IPO_GLOBALSPLIT_H

lib/Passes/PassBuilder.cpp

@@ -70,6 +70,7 @@
 #include "llvm/Transforms/IPO/FunctionImport.h"
 #include "llvm/Transforms/IPO/GlobalDCE.h"
 #include "llvm/Transforms/IPO/GlobalOpt.h"
+#include "llvm/Transforms/IPO/GlobalSplit.h"
 #include "llvm/Transforms/IPO/InferFunctionAttrs.h"
 #include "llvm/Transforms/IPO/Internalize.h"
 #include "llvm/Transforms/IPO/LowerTypeTests.h"

lib/Passes/PassRegistry.def

@@ -47,6 +47,7 @@ MODULE_PASS("forceattrs", ForceFunctionAttrsPass())
 MODULE_PASS("function-import", FunctionImportPass())
 MODULE_PASS("globaldce", GlobalDCEPass())
 MODULE_PASS("globalopt", GlobalOptPass())
+MODULE_PASS("globalsplit", GlobalSplitPass())
 MODULE_PASS("inferattrs", InferFunctionAttrsPass())
 MODULE_PASS("insert-gcov-profiling", GCOVProfilerPass())
 MODULE_PASS("instrprof", InstrProfiling())

lib/Transforms/IPO/GlobalSplit.cpp

@@ -15,6 +15,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/IPO/GlobalSplit.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/GlobalVariable.h"
@@ -162,3 +163,9 @@ char GlobalSplit::ID = 0;
 ModulePass *llvm::createGlobalSplitPass() {
   return new GlobalSplit;
 }
+
+PreservedAnalyses GlobalSplitPass::run(Module &M, ModuleAnalysisManager &AM) {
+  if (!splitGlobals(M))
+    return PreservedAnalyses::all();
+  return PreservedAnalyses::none();
+}

test/Transforms/GlobalSplit/basic.ll

@@ -1,4 +1,5 @@
 ; RUN: opt -S -globalsplit %s | FileCheck %s
+; RUN: opt -S -passes=globalsplit %s | FileCheck %s
 
 target datalayout = "e-p:64:64"
 target triple = "x86_64-unknown-linux-gnu"