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Allow the code cloning interfaces to capture some important info about the

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code being cloned if the client wants.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25281 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2006-01-13 18:39:17 +00:00
parent 21f20558d6
commit a4c29d2037
2 changed files with 74 additions and 17 deletions
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46
lib/Transforms/Utils/CloneFunction.cpp
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@@ -14,8 +14,9 @@
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Instructions.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Instructions.h"
#include "llvm/Function.h"
#include "ValueMapper.h"
using namespace llvm;
@@ -23,11 +24,14 @@ using namespace llvm;
// CloneBasicBlock - See comments in Cloning.h
BasicBlock *llvm::CloneBasicBlock(const BasicBlock *BB,
std::map<const Value*, Value*> &ValueMap,
const char *NameSuffix, Function *F) {
const char *NameSuffix, Function *F,
ClonedCodeInfo *CodeInfo) {
BasicBlock *NewBB = new BasicBlock("", F);
if (BB->hasName()) NewBB->setName(BB->getName()+NameSuffix);
// Loop over all instructions copying them over...
bool hasCalls = false, hasDynamicAllocas = false, hasStaticAllocas = false;
// Loop over all instructions, and copy them over.
for (BasicBlock::const_iterator II = BB->begin(), IE = BB->end();
II != IE; ++II) {
Instruction *NewInst = II->clone();
@@ -35,6 +39,22 @@ BasicBlock *llvm::CloneBasicBlock(const BasicBlock *BB,
NewInst->setName(II->getName()+NameSuffix);
NewBB->getInstList().push_back(NewInst);
ValueMap[II] = NewInst; // Add instruction map to value.
hasCalls |= isa<CallInst>(II);
if (const AllocaInst *AI = dyn_cast<AllocaInst>(II)) {
if (isa<ConstantInt>(AI->getArraySize()))
hasStaticAllocas = true;
else
hasDynamicAllocas = true;
}
}
if (CodeInfo) {
CodeInfo->ContainsCalls |= hasCalls;
CodeInfo->ContainsUnwinds |= isa<UnwindInst>(BB->getTerminator());
CodeInfo->ContainsDynamicAllocas |= hasDynamicAllocas;
CodeInfo->ContainsDynamicAllocas |= hasStaticAllocas &&
BB != &BB->getParent()->front();
}
return NewBB;
}
@@ -45,12 +65,12 @@ BasicBlock *llvm::CloneBasicBlock(const BasicBlock *BB,
void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
std::map<const Value*, Value*> &ValueMap,
std::vector<ReturnInst*> &Returns,
const char *NameSuffix) {
const char *NameSuffix, ClonedCodeInfo *CodeInfo) {
assert(NameSuffix && "NameSuffix cannot be null!");
#ifndef NDEBUG
for (Function::const_arg_iterator I = OldFunc->arg_begin(), E = OldFunc->arg_end();
I != E; ++I)
for (Function::const_arg_iterator I = OldFunc->arg_begin(),
E = OldFunc->arg_end(); I != E; ++I)
assert(ValueMap.count(I) && "No mapping from source argument specified!");
#endif
@@ -63,7 +83,8 @@ void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
const BasicBlock &BB = *BI;
// Create a new basic block and copy instructions into it!
BasicBlock *CBB = CloneBasicBlock(&BB, ValueMap, NameSuffix, NewFunc);
BasicBlock *CBB = CloneBasicBlock(&BB, ValueMap, NameSuffix, NewFunc,
CodeInfo);
ValueMap[&BB] = CBB; // Add basic block mapping.
if (ReturnInst *RI = dyn_cast<ReturnInst>(CBB->getTerminator()))
@@ -89,13 +110,15 @@ void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
/// the function from their old to new values.
///
Function *llvm::CloneFunction(const Function *F,
std::map<const Value*, Value*> &ValueMap) {
std::map<const Value*, Value*> &ValueMap,
ClonedCodeInfo *CodeInfo) {
std::vector<const Type*> ArgTypes;
// The user might be deleting arguments to the function by specifying them in
// the ValueMap. If so, we need to not add the arguments to the arg ty vector
//
for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
I != E; ++I)
if (ValueMap.count(I) == 0) // Haven't mapped the argument to anything yet?
ArgTypes.push_back(I->getType());
@@ -108,14 +131,15 @@ Function *llvm::CloneFunction(const Function *F,
// Loop over the arguments, copying the names of the mapped arguments over...
Function::arg_iterator DestI = NewF->arg_begin();
for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
I != E; ++I)
if (ValueMap.count(I) == 0) { // Is this argument preserved?
DestI->setName(I->getName()); // Copy the name over...
ValueMap[I] = DestI++; // Add mapping to ValueMap
}
std::vector<ReturnInst*> Returns; // Ignore returns cloned...
CloneFunctionInto(NewF, F, ValueMap, Returns);
CloneFunctionInto(NewF, F, ValueMap, Returns, "", CodeInfo);
return NewF;
}