Expose a public interface to this pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52029 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 73 insertions, 40 deletions

diff --git a/include/llvm/Analysis/LibCallAliasAnalysis.h b/include/llvm/Analysis/LibCallAliasAnalysis.h
new file mode 100644
index 0000000000..72b9947a03
--- /dev/null
+++ b/include/llvm/Analysis/LibCallAliasAnalysis.h
@@ -0,0 +1,61 @@
+//===- LibCallAliasAnalysis.h - Implement AliasAnalysis for libcalls ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the LibCallAliasAnalysis class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_LIBCALL_AA_H
+#define LLVM_ANALYSIS_LIBCALL_AA_H
+
+#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Pass.h"
+
+namespace llvm {
+  class LibCallInfo;
+  class LibCallFunctionInfo;
+  
+  /// LibCallAliasAnalysis - Alias analysis driven from LibCallInfo.
+  struct LibCallAliasAnalysis : public FunctionPass, AliasAnalysis {
+    static char ID; // Class identification
+    
+    LibCallInfo *LCI;
+    
+    explicit LibCallAliasAnalysis(LibCallInfo *LC = 0)
+      : FunctionPass(&ID), LCI(LC) {
+    }
+    explicit LibCallAliasAnalysis(const void *ID, LibCallInfo *LC)
+      : FunctionPass(ID), LCI(LC) {
+    }
+    ~LibCallAliasAnalysis();
+    
+    ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size);
+    
+    ModRefResult getModRefInfo(CallSite CS1, CallSite CS2) {
+      // TODO: Could compare two direct calls against each other if we cared to.
+      return AliasAnalysis::getModRefInfo(CS1,CS2);
+    }
+    
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const;
+    
+    virtual bool runOnFunction(Function &F) {
+      InitializeAliasAnalysis(this);                 // set up super class
+      return false;
+    }
+    
+    /// hasNoModRefInfoForCalls - We can provide mod/ref information against
+    /// non-escaping allocations.
+    virtual bool hasNoModRefInfoForCalls() const { return false; }
+  private:
+    ModRefResult AnalyzeLibCallDetails(const LibCallFunctionInfo *FI,
+                                       CallSite CS, Value *P, unsigned Size);
+  };
+}  // End of llvm namespace
+
+#endif
diff --git a/lib/Analysis/LibCallAliasAnalysis.cpp b/lib/Analysis/LibCallAliasAnalysis.cpp
index afc60ddb84..971e6e7acc 100644
--- a/lib/Analysis/LibCallAliasAnalysis.cpp
+++ b/lib/Analysis/LibCallAliasAnalysis.cpp
@@ -11,52 +11,13 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Analysis/LibCallAliasAnalysis.h"
 #include "llvm/Analysis/Passes.h"
 #include "llvm/Analysis/LibCallSemantics.h"
 #include "llvm/Function.h"
 #include "llvm/Pass.h"
 #include "llvm/Target/TargetData.h"
 using namespace llvm;
-
-namespace {
-  /// LibCallAliasAnalysis - Alias analysis driven from LibCallInfo.
-  struct LibCallAliasAnalysis : public FunctionPass, AliasAnalysis {
-    static char ID; // Class identification
-    
-    LibCallInfo *LCI;
-    
-    explicit LibCallAliasAnalysis(LibCallInfo *LC = 0)
-      : FunctionPass((intptr_t)&ID), LCI(LC) {
-    }
-    ~LibCallAliasAnalysis() {
-      delete LCI;
-    }
-    
-    ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size);
-    ModRefResult getModRefInfo(CallSite CS1, CallSite CS2) {
-      // TODO: Could compare two direct calls against each other if we cared to.
-      return AliasAnalysis::getModRefInfo(CS1,CS2);
-    }
-    
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      AliasAnalysis::getAnalysisUsage(AU);
-      AU.addRequired<TargetData>();
-      AU.setPreservesAll();                         // Does not transform code
-    }
-    
-    virtual bool runOnFunction(Function &F) {
-      InitializeAliasAnalysis(this);                 // set up super class
-      return false;
-    }
-    
-    /// hasNoModRefInfoForCalls - We can provide mod/ref information against
-    /// non-escaping allocations.
-    virtual bool hasNoModRefInfoForCalls() const { return false; }
-  private:
-    ModRefResult AnalyzeLibCallDetails(const LibCallFunctionInfo *FI,
-                                       CallSite CS, Value *P, unsigned Size);
-  };
-}  // End of anonymous namespace
   
 // Register this pass...
 char LibCallAliasAnalysis::ID = 0;
@@ -70,6 +31,17 @@ FunctionPass *llvm::createLibCallAliasAnalysisPass(LibCallInfo *LCI) {
   return new LibCallAliasAnalysis(LCI);
 }
 
+LibCallAliasAnalysis::~LibCallAliasAnalysis() {
+  delete LCI;
+}
+
+void LibCallAliasAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
+  AliasAnalysis::getAnalysisUsage(AU);
+  AU.addRequired<TargetData>();
+  AU.setPreservesAll();                         // Does not transform code
+}
+
+
 
 /// AnalyzeLibCallDetails - Given a call to a function with the specified
 /// LibCallFunctionInfo, see if we can improve the mod/ref footprint of the call