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Make ExecutionEngine::updateGlobalMapping return the old mapping.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49206 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2008-04-04 04:47:41 +00:00
parent fc5423d561
commit f4cc3096fd
2 changed files with 25 additions and 10 deletions
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23
lib/ExecutionEngine/ExecutionEngine.cpp
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@ -109,18 +109,30 @@ void ExecutionEngine::clearAllGlobalMappings() {
/// updateGlobalMapping - Replace an existing mapping for GV with a new
/// address. This updates both maps as required. If "Addr" is null, the
/// entry for the global is removed from the mappings.
void ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
MutexGuard locked(lock);
std::map<const GlobalValue*, void *> &Map = state.getGlobalAddressMap(locked);
// Deleting from the mapping?
if (Addr == 0) {
state.getGlobalAddressMap(locked).erase(GV);
std::map<const GlobalValue*, void *>::iterator I = Map.find(GV);
void *OldVal;
if (I == Map.end())
OldVal = 0;
else {
OldVal = I->second;
Map.erase(I);
}
if (!state.getGlobalAddressReverseMap(locked).empty())
state.getGlobalAddressReverseMap(locked).erase(Addr);
return;
return OldVal;
}
void *&CurVal = state.getGlobalAddressMap(locked)[GV];
void *&CurVal = Map[GV];
void *OldVal = CurVal;
if (CurVal && !state.getGlobalAddressReverseMap(locked).empty())
state.getGlobalAddressReverseMap(locked).erase(CurVal);
CurVal = Addr;
@ -131,6 +143,7 @@ void ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
assert((V == 0 || GV == 0) && "GlobalMapping already established!");
V = GV;
}
return OldVal;
}
/// getPointerToGlobalIfAvailable - This returns the address of the specified