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Emit the MachineConstantPool constants in one contiguous memory `pool'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10060 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -187,13 +187,28 @@ void Emitter::finishFunction(MachineFunction &F) {
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void Emitter::emitConstantPool(MachineConstantPool *MCP) {
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const std::vector<Constant*> &Constants = MCP->getConstants();
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if (Constants.size() == 0) return;
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std::vector<unsigned> ConstantSizes;
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unsigned TotalSize = 0;
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// Calculate how much space we will need for all the constants
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for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
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// For now we just allocate some memory on the heap, this can be
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// dramatically improved.
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const Type *Ty = ((Value*)Constants[i])->getType();
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void *Addr = malloc(TheVM->getTargetData().getTypeSize(Ty));
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TheVM->InitializeMemory(Constants[i], Addr);
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ConstantPoolAddresses.push_back(Addr);
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unsigned TySize = TheVM->getTargetData().getTypeSize(Ty);
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ConstantSizes.push_back(TySize);
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TotalSize += TySize;
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}
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// Allocate a 'pool' of memory just once
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void *ConstPool = malloc(TotalSize);
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if (!ConstPool) {
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perror("malloc");
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abort();
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}
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// Initialize each slot in the 'pool' appropriately
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for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
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TheVM->InitializeMemory(Constants[i], ConstPool);
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ConstantPoolAddresses.push_back(ConstPool);
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ConstPool = (void*) ((intptr_t)ConstPool + ConstantSizes[i]);
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}
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}
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