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Added routine to clone the body of a function and maintain a map of already

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cloned functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96485 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjiv Gupta 2010-02-17 18:11:29 +00:00
parent 411432d726
commit 94c3ddbcc6
2 changed files with 45 additions and 0 deletions
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38
lib/Target/PIC16/PIC16Passes/PIC16Cloner.cpp
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@ -212,3 +212,41 @@ void PIC16Cloner::markCallGraph(CallGraphNode *CGN, string StringMark) {
} // end of loop of all called functions.
}
// Clone the given function and return it.
// Note: it uses the ValueMap member of the class, which is already populated
// by cloneAutos by the time we reach here.
// FIXME: Should we just pass ValueMap's ref as a parameter here? rather
// than keeping the ValueMap as a member.
Function *
PIC16Cloner::cloneFunction(Function *OrgF) {
Function *ClonedF;
// See if we already cloned it. Return that.
cloned_map_iterator cm_it = ClonedFunctionMap.find(OrgF);
if(cm_it != ClonedFunctionMap.end()) {
ClonedF = cm_it->second;
return ClonedF;
}
// Clone does not exist.
// First clone the autos, and populate ValueMap.
CloneAutos(OrgF);
// Now create the clone.
ClonedF = CloneFunction(OrgF, ValueMap);
// The new function should be for interrupt line. Therefore should have
// the name suffixed with IL and section attribute marked with IL.
ClonedF->setName(PAN::getCloneFnName(OrgF->getName()));
ClonedF->setSection("IL");
// Add the newly created function to the module.
OrgF->getParent()->getFunctionList().push_back(ClonedF);
// Update the ClonedFunctionMap to record this cloning activity.
ClonedFunctionMap[OrgF] = ClonedF;
return ClonedF;
}

7
lib/Target/PIC16/PIC16Passes/PIC16Cloner.h
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@ -48,6 +48,9 @@ namespace llvm {
// Clone auto variables of function specified.
void CloneAutos(Function *F);
// Clone the body of a function.
Function *cloneFunction(Function *F);
// Error reporting for PIC16Pass
void reportError(string ErrorString, vector<string> &Values);
@ -64,6 +67,10 @@ namespace llvm {
// This value map is passed during the function cloning so that all the
// uses of auto variables be updated properly.
DenseMap<const Value*, Value*> ValueMap;
// Map of a already cloned functions.
map<Function *, Function *> ClonedFunctionMap;
typedef map<Function *, Function *>::iterator cloned_map_iterator;
};
} // End of anonymous namespace