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Emit the MachineConstantPool constants in one contiguous memory `pool'.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10060 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2003-11-17 20:40:07 +00:00
parent 0ca042db71
commit ef7e57018d
1 changed files with 20 additions and 5 deletions
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25
lib/ExecutionEngine/JIT/JITEmitter.cpp
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@ -187,13 +187,28 @@ void Emitter::finishFunction(MachineFunction &F) {
void Emitter::emitConstantPool(MachineConstantPool *MCP) {
const std::vector<Constant*> &Constants = MCP->getConstants();
if (Constants.size() == 0) return;
std::vector<unsigned> ConstantSizes;
unsigned TotalSize = 0;
// Calculate how much space we will need for all the constants
for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
// For now we just allocate some memory on the heap, this can be
// dramatically improved.
const Type *Ty = ((Value*)Constants[i])->getType();
void *Addr = malloc(TheVM->getTargetData().getTypeSize(Ty));
TheVM->InitializeMemory(Constants[i], Addr);
ConstantPoolAddresses.push_back(Addr);
unsigned TySize = TheVM->getTargetData().getTypeSize(Ty);
ConstantSizes.push_back(TySize);
TotalSize += TySize;
}
// Allocate a 'pool' of memory just once
void *ConstPool = malloc(TotalSize);
if (!ConstPool) {
perror("malloc");
abort();
}
// Initialize each slot in the 'pool' appropriately
for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
TheVM->InitializeMemory(Constants[i], ConstPool);
ConstantPoolAddresses.push_back(ConstPool);
ConstPool = (void*) ((intptr_t)ConstPool + ConstantSizes[i]);
}
}