//===- Cloning.h - Clone various parts of LLVM programs ---------*- C++ -*-===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// This file defines various functions that are used to clone chunks of LLVM
// code for various purposes. This varies from copying whole modules into new
// modules, to cloning functions with different arguments, to inlining
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_TRANSFORMS_UTIlS_CLONING_H
-#define LLVM_TRANSFORMS_UTIlS_CLONING_H
+#ifndef LLVM_TRANSFORMS_UTILS_CLONING_H
+#define LLVM_TRANSFORMS_UTILS_CLONING_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/ADT/ValueMap.h"
+#include "llvm/Support/ValueHandle.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
+
+namespace llvm {
-#include <vector>
class Module;
class Function;
+class Instruction;
+class Pass;
+class LPPassManager;
class BasicBlock;
class Value;
class CallInst;
+class InvokeInst;
class ReturnInst;
+class CallSite;
+class Trace;
+class CallGraph;
+class DataLayout;
+class Loop;
+class LoopInfo;
+class AllocaInst;
-// Clone OldFunc into NewFunc, transforming the old arguments into references to
-// ArgMap values. Note that if NewFunc already has basic blocks, the ones
-// cloned into it will be added to the end of the function. This function fills
-// in a list of return instructions, and can optionally append the specified
-// suffix to all values cloned.
-//
+/// CloneModule - Return an exact copy of the specified module
+///
+Module *CloneModule(const Module *M);
+Module *CloneModule(const Module *M, ValueToValueMapTy &VMap);
+
+/// ClonedCodeInfo - This struct can be used to capture information about code
+/// being cloned, while it is being cloned.
+struct ClonedCodeInfo {
+ /// ContainsCalls - This is set to true if the cloned code contains a normal
+ /// call instruction.
+ bool ContainsCalls;
+
+ /// ContainsDynamicAllocas - This is set to true if the cloned code contains
+ /// a 'dynamic' alloca. Dynamic allocas are allocas that are either not in
+ /// the entry block or they are in the entry block but are not a constant
+ /// size.
+ bool ContainsDynamicAllocas;
+
+ ClonedCodeInfo() : ContainsCalls(false), ContainsDynamicAllocas(false) {}
+};
+
+
+/// CloneBasicBlock - Return a copy of the specified basic block, but without
+/// embedding the block into a particular function. The block returned is an
+/// exact copy of the specified basic block, without any remapping having been
+/// performed. Because of this, this is only suitable for applications where
+/// the basic block will be inserted into the same function that it was cloned
+/// from (loop unrolling would use this, for example).
+///
+/// Also, note that this function makes a direct copy of the basic block, and
+/// can thus produce illegal LLVM code. In particular, it will copy any PHI
+/// nodes from the original block, even though there are no predecessors for the
+/// newly cloned block (thus, phi nodes will have to be updated). Also, this
+/// block will branch to the old successors of the original block: these
+/// successors will have to have any PHI nodes updated to account for the new
+/// incoming edges.
+///
+/// The correlation between instructions in the source and result basic blocks
+/// is recorded in the VMap map.
+///
+/// If you have a particular suffix you'd like to use to add to any cloned
+/// names, specify it as the optional third parameter.
+///
+/// If you would like the basic block to be auto-inserted into the end of a
+/// function, you can specify it as the optional fourth parameter.
+///
+/// If you would like to collect additional information about the cloned
+/// function, you can specify a ClonedCodeInfo object with the optional fifth
+/// parameter.
+///
+BasicBlock *CloneBasicBlock(const BasicBlock *BB,
+ ValueToValueMapTy &VMap,
+ const Twine &NameSuffix = "", Function *F = 0,
+ ClonedCodeInfo *CodeInfo = 0);
+
+/// CloneFunction - Return a copy of the specified function, but without
+/// embedding the function into another module. Also, any references specified
+/// in the VMap are changed to refer to their mapped value instead of the
+/// original one. If any of the arguments to the function are in the VMap,
+/// the arguments are deleted from the resultant function. The VMap is
+/// updated to include mappings from all of the instructions and basicblocks in
+/// the function from their old to new values. The final argument captures
+/// information about the cloned code if non-null.
+///
+/// If ModuleLevelChanges is false, VMap contains no non-identity GlobalValue
+/// mappings.
+///
+Function *CloneFunction(const Function *F,
+ ValueToValueMapTy &VMap,
+ bool ModuleLevelChanges,
+ ClonedCodeInfo *CodeInfo = 0);
+
+/// Clone OldFunc into NewFunc, transforming the old arguments into references
+/// to VMap values. Note that if NewFunc already has basic blocks, the ones
+/// cloned into it will be added to the end of the function. This function
+/// fills in a list of return instructions, and can optionally remap types
+/// and/or append the specified suffix to all values cloned.
+///
+/// If ModuleLevelChanges is false, VMap contains no non-identity GlobalValue
+/// mappings.
+///
void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
- const std::vector<Value*> &ArgMap,
- std::vector<ReturnInst*> &Returns,
- const char *NameSuffix = "");
+ ValueToValueMapTy &VMap,
+ bool ModuleLevelChanges,
+ SmallVectorImpl<ReturnInst*> &Returns,
+ const char *NameSuffix = "",
+ ClonedCodeInfo *CodeInfo = 0,
+ ValueMapTypeRemapper *TypeMapper = 0);
+/// CloneAndPruneFunctionInto - This works exactly like CloneFunctionInto,
+/// except that it does some simple constant prop and DCE on the fly. The
+/// effect of this is to copy significantly less code in cases where (for
+/// example) a function call with constant arguments is inlined, and those
+/// constant arguments cause a significant amount of code in the callee to be
+/// dead. Since this doesn't produce an exactly copy of the input, it can't be
+/// used for things like CloneFunction or CloneModule.
+///
+/// If ModuleLevelChanges is false, VMap contains no non-identity GlobalValue
+/// mappings.
+///
+void CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
+ ValueToValueMapTy &VMap,
+ bool ModuleLevelChanges,
+ SmallVectorImpl<ReturnInst*> &Returns,
+ const char *NameSuffix = "",
+ ClonedCodeInfo *CodeInfo = 0,
+ const DataLayout *TD = 0,
+ Instruction *TheCall = 0);
-// InlineFunction - This function forcibly inlines the called function into the
-// basic block of the caller. This returns true if it is not possible to inline
-// this call. The program is still in a well defined state if this occurs
-// though.
-//
-// Note that this only does one level of inlining. For example, if the
-// instruction 'call B' is inlined, and 'B' calls 'C', then the call to 'C' now
-// exists in the instruction stream. Similiarly this will inline a recursive
-// function by one level.
-//
-bool InlineFunction(CallInst *C);
+
+/// InlineFunctionInfo - This class captures the data input to the
+/// InlineFunction call, and records the auxiliary results produced by it.
+class InlineFunctionInfo {
+public:
+ explicit InlineFunctionInfo(CallGraph *cg = 0, const DataLayout *td = 0)
+ : CG(cg), TD(td) {}
+
+ /// CG - If non-null, InlineFunction will update the callgraph to reflect the
+ /// changes it makes.
+ CallGraph *CG;
+ const DataLayout *TD;
+
+ /// StaticAllocas - InlineFunction fills this in with all static allocas that
+ /// get copied into the caller.
+ SmallVector<AllocaInst*, 4> StaticAllocas;
+
+ /// InlinedCalls - InlineFunction fills this in with callsites that were
+ /// inlined from the callee. This is only filled in if CG is non-null.
+ SmallVector<WeakVH, 8> InlinedCalls;
+
+ void reset() {
+ StaticAllocas.clear();
+ InlinedCalls.clear();
+ }
+};
+
+/// InlineFunction - This function inlines the called function into the basic
+/// block of the caller. This returns false if it is not possible to inline
+/// this call. The program is still in a well defined state if this occurs
+/// though.
+///
+/// Note that this only does one level of inlining. For example, if the
+/// instruction 'call B' is inlined, and 'B' calls 'C', then the call to 'C' now
+/// exists in the instruction stream. Similarly this will inline a recursive
+/// function by one level.
+///
+bool InlineFunction(CallInst *C, InlineFunctionInfo &IFI, bool InsertLifetime = true);
+bool InlineFunction(InvokeInst *II, InlineFunctionInfo &IFI, bool InsertLifetime = true);
+bool InlineFunction(CallSite CS, InlineFunctionInfo &IFI, bool InsertLifetime = true);
+
+} // End llvm namespace
#endif
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