Manage MachineFunctions with an analysis Pass instead of the Annotable
mechanism. To support this, make MachineFunctionPass a little more
complete.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77654 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineFunctionPass.cpp b/lib/CodeGen/MachineFunctionPass.cpp
new file mode 100644
index 0000000..d8a7c55
--- /dev/null
+++ b/lib/CodeGen/MachineFunctionPass.cpp
@@ -0,0 +1,50 @@
+//===-- MachineFunctionPass.cpp -------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the definitions of the MachineFunctionPass members.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Analysis/ScalarEvolution.h"
+#include "llvm/Analysis/IVUsers.h"
+#include "llvm/Analysis/LiveValues.h"
+#include "llvm/Analysis/LoopDependenceAnalysis.h"
+#include "llvm/Analysis/MemoryDependenceAnalysis.h"
+#include "llvm/CodeGen/MachineFunctionAnalysis.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+using namespace llvm;
+
+bool MachineFunctionPass::runOnFunction(Function &F) {
+ // Do not codegen any 'available_externally' functions at all, they have
+ // definitions outside the translation unit.
+ if (F.hasAvailableExternallyLinkage())
+ return false;
+
+ MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
+ return runOnMachineFunction(MF);
+}
+
+void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequired<MachineFunctionAnalysis>();
+
+ // MachineFunctionPass preserves all LLVM IR passes, but there's no
+ // high-level way to express this. Instead, just list a bunch of
+ // passes explicitly.
+ AU.addPreserved<AliasAnalysis>();
+ AU.addPreserved<ScalarEvolution>();
+ AU.addPreserved<IVUsers>();
+ AU.addPreserved<LoopDependenceAnalysis>();
+ AU.addPreserved<MemoryDependenceAnalysis>();
+ AU.addPreserved<LiveValues>();
+ AU.addPreserved<MachineFunctionAnalysis>();
+ AU.setPreservesCFG();
+
+ FunctionPass::getAnalysisUsage(AU);
+}