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Minor changes to cloning interface

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4770 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-11-19 22:54:01 +00:00
parent 6c2e2e5287
commit d18015599c
3 changed files with 38 additions and 19 deletions
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25
include/llvm/Transforms/Utils/Cloning.h
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@ -12,6 +12,7 @@
#define LLVM_TRANSFORMS_UTIlS_CLONING_H
#include <vector>
#include <map>
class Module;
class Function;
class BasicBlock;
@ -19,6 +20,28 @@ class Value;
class CallInst;
class ReturnInst;
/// CloneModule - Return an exact copy of the specified module
///
Module *CloneModule(Module *M);
/// CloneFunction - Return a copy of the specified function, but without
/// embedding the function into another module. Also, any references specified
/// in the ValueMap are changed to refer to their mapped value instead of the
/// original one. If any of the arguments to the function are in the ValueMap,
/// the arguments are deleted from the resultant function. The ValueMap is
/// updated to include mappings from all of the instructions and basicblocks in
/// the function from their old to new values.
///
Function *CloneFunction(const Function *F,
std::map<const Value*, Value*> &ValueMap);
/// CloneFunction - Version of the function that doesn't need the ValueMap.
///
inline Function *CloneFunction(const Function *F) {
std::map<const Value*, Value*> ValueMap;
return CloneFunction(F, ValueMap);
}
// 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
@ -26,7 +49,7 @@ class ReturnInst;
// suffix to all values cloned.
//
void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
const std::vector<Value*> &ArgMap,
std::map<const Value*, Value*> &ValueMap,
std::vector<ReturnInst*> &Returns,
const char *NameSuffix = "");

13
lib/Transforms/IPO/InlineSimple.cpp
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@ -90,9 +90,14 @@ bool InlineFunction(CallInst *CI) {
Function::iterator LastBlock = &OrigBB->getParent()->back();
// Calculate the vector of arguments to pass into the function cloner...
std::vector<Value*> ArgVector;
for (unsigned i = 1, e = CI->getNumOperands(); i != e; ++i)
ArgVector.push_back(CI->getOperand(i));
std::map<const Value*, Value*> ValueMap;
assert((unsigned)std::distance(CalledFunc->abegin(), CalledFunc->aend()) ==
CI->getNumOperands()-1 && "No varargs calls can be inlined yet!");
unsigned i = 1;
for (Function::const_aiterator I = CalledFunc->abegin(), E=CalledFunc->aend();
I != E; ++I, ++i)
ValueMap[I] = CI->getOperand(i);
// Since we are now done with the CallInst, we can delete it.
delete CI;
@ -101,7 +106,7 @@ bool InlineFunction(CallInst *CI) {
std::vector<ReturnInst*> Returns;
// Do all of the hard part of cloning the callee into the caller...
CloneFunctionInto(OrigBB->getParent(), CalledFunc, ArgVector, Returns, ".i");
CloneFunctionInto(OrigBB->getParent(), CalledFunc, ValueMap, Returns, ".i");
// Loop over all of the return instructions, turning them into unconditional
// branches to the merge point now...

19
lib/Transforms/Utils/CloneFunction.cpp
View File

@ -37,25 +37,16 @@ static inline void RemapInstruction(Instruction *I,
// ArgMap values.
//
void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
const std::vector<Value*> &ArgMap,
std::map<const Value*, Value*> &ValueMap,
std::vector<ReturnInst*> &Returns,
const char *NameSuffix) {
assert(NameSuffix && "NameSuffix cannot be null!");
assert(OldFunc->asize() == ArgMap.size() &&
"Improper number of argument values to map specified!");
// Keep a mapping between the original function's values and the new
// duplicated code's values. This includes all of: Function arguments,
// instruction values, constant pool entries, and basic blocks.
//
std::map<const Value *, Value*> ValueMap;
// Add all of the function arguments to the mapping...
unsigned i = 0;
#ifndef NDEBUG
for (Function::const_aiterator I = OldFunc->abegin(), E = OldFunc->aend();
I != E; ++I, ++i)
ValueMap[I] = ArgMap[i];
I != E; ++I)
assert(ValueMap.count(I) && "No mapping from source argument specified!");
#endif
// Loop over all of the basic blocks in the function, cloning them as
// appropriate. Note that we save BE this way in order to handle cloning of