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https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
Added function computeOffsetforLocalVar to check how big the
offset-from-FP will be before allocating space for a local variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1905 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -29,8 +29,9 @@ static AnnotationID MCFM_AID(
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// This should not be called before "construct()"
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// This should not be called before "construct()"
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// for a given Method.
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// for a given Method.
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//
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//
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MachineCodeForMethod &MachineCodeForMethod::construct(const Method *M,
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MachineCodeForMethod&
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const TargetMachine &Tar){
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MachineCodeForMethod::construct(const Method *M, const TargetMachine &Tar)
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{
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assert(M->getAnnotation(MCFM_AID) == 0 &&
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assert(M->getAnnotation(MCFM_AID) == 0 &&
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"Object already exists for this method!");
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"Object already exists for this method!");
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MachineCodeForMethod* mcInfo = new MachineCodeForMethod(M, Tar);
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MachineCodeForMethod* mcInfo = new MachineCodeForMethod(M, Tar);
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@ -38,13 +39,16 @@ MachineCodeForMethod &MachineCodeForMethod::construct(const Method *M,
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return *mcInfo;
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return *mcInfo;
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}
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}
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void MachineCodeForMethod::destruct(const Method *M) {
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void
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MachineCodeForMethod::destruct(const Method *M)
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{
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bool Deleted = M->deleteAnnotation(MCFM_AID);
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bool Deleted = M->deleteAnnotation(MCFM_AID);
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assert(Deleted && "Machine code did not exist for method!");
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assert(Deleted && "Machine code did not exist for method!");
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}
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}
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MachineCodeForMethod&
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MachineCodeForMethod &MachineCodeForMethod::get(const Method* method) {
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MachineCodeForMethod::get(const Method* method)
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{
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MachineCodeForMethod* mc = (MachineCodeForMethod*)
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MachineCodeForMethod* mc = (MachineCodeForMethod*)
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method->getAnnotation(MCFM_AID);
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method->getAnnotation(MCFM_AID);
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assert(mc && "Call construct() method first to allocate the object");
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assert(mc && "Call construct() method first to allocate the object");
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@ -59,34 +63,37 @@ ComputeMaxOptionalArgsSize(const TargetMachine& target, const Method* method)
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unsigned int maxSize = 0;
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unsigned int maxSize = 0;
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for (Method::const_iterator MI=method->begin(), ME=method->end();
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for (Method::const_iterator MI=method->begin(), ME=method->end();
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MI != ME; ++MI) {
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MI != ME; ++MI)
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const BasicBlock *BB = *MI;
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{
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for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
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const BasicBlock *BB = *MI;
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if (CallInst *callInst = dyn_cast<CallInst>(*I)) {
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for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
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unsigned int numOperands = callInst->getNumOperands() - 1;
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if (CallInst *callInst = dyn_cast<CallInst>(*I))
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int numExtra = (int) numOperands - frameInfo.getNumFixedOutgoingArgs();
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if (numExtra <= 0)
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continue;
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unsigned int sizeForThisCall;
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if (frameInfo.argsOnStackHaveFixedSize())
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{
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{
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int argSize = frameInfo.getSizeOfEachArgOnStack();
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unsigned int numOperands = callInst->getNumOperands() - 1;
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sizeForThisCall = numExtra * (unsigned) argSize;
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int numExtra = (int) numOperands - frameInfo.getNumFixedOutgoingArgs();
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}
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if (numExtra <= 0)
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else
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continue;
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{
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assert(0 && "UNTESTED CODE: Size per stack argument is not fixed on this architecture: use actual arg sizes to compute MaxOptionalArgsSize");
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unsigned int sizeForThisCall;
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sizeForThisCall = 0;
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if (frameInfo.argsOnStackHaveFixedSize())
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for (unsigned i=0; i < numOperands; ++i)
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{
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sizeForThisCall += target.findOptimalStorageSize(callInst->
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int argSize = frameInfo.getSizeOfEachArgOnStack();
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getOperand(i)->getType());
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sizeForThisCall = numExtra * (unsigned) argSize;
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}
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}
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else
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{
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assert(0 && "UNTESTED CODE: Size per stack argument is not fixed on this architecture: use actual arg sizes to compute MaxOptionalArgsSize");
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sizeForThisCall = 0;
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for (unsigned i=0; i < numOperands; ++i)
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sizeForThisCall += target.findOptimalStorageSize(callInst->
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getOperand(i)->getType());
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}
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if (maxSize < sizeForThisCall)
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maxSize = sizeForThisCall;
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}
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}
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if (maxSize < sizeForThisCall)
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maxSize = sizeForThisCall;
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}
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}
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return maxSize;
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return maxSize;
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}
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}
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@ -120,8 +127,41 @@ MachineCodeForMethod::MachineCodeForMethod(const Method* _M,
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currentTmpValuesSize(0)
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currentTmpValuesSize(0)
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{
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{
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maxOptionalArgsSize = ComputeMaxOptionalArgsSize(target, method);
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maxOptionalArgsSize = ComputeMaxOptionalArgsSize(target, method);
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staticStackSize = maxOptionalArgsSize +
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staticStackSize = maxOptionalArgsSize
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target.getFrameInfo().getMinStackFrameSize();
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+ target.getFrameInfo().getMinStackFrameSize();
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}
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int
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MachineCodeForMethod::computeOffsetforLocalVar(const TargetMachine& target,
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const Value* val,
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unsigned int size)
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{
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bool growUp;
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int firstOffset =target.getFrameInfo().getFirstAutomaticVarOffset(*this,
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growUp);
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unsigned char align;
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if (size == 0)
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{
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size = target.findOptimalStorageSize(val->getType());
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// align = target.DataLayout.getTypeAlignment(val->getType());
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}
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align = SizeToAlignment(size, target);
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int offset = getAutomaticVarsSize();
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if (! growUp)
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offset += size;
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if (unsigned int mod = offset % align)
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{
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offset += align - mod;
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size += align - mod;
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}
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offset = growUp? firstOffset + offset
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: firstOffset - offset;
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return offset;
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}
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}
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int
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int
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@ -134,33 +174,8 @@ MachineCodeForMethod::allocateLocalVar(const TargetMachine& target,
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int offset = getOffset(val);
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int offset = getOffset(val);
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if (offset == INVALID_FRAME_OFFSET)
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if (offset == INVALID_FRAME_OFFSET)
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{
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{
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bool growUp;
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offset = this->computeOffsetforLocalVar(target, val, size);
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int firstOffset =target.getFrameInfo().getFirstAutomaticVarOffset(*this,
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growUp);
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unsigned char align;
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if (size == 0)
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{
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size = target.findOptimalStorageSize(val->getType());
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// align = target.DataLayout.getTypeAlignment(val->getType());
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}
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align = SizeToAlignment(size, target);
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offset = getAutomaticVarsSize();
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if (! growUp)
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offset += size;
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if (unsigned int mod = offset % align)
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{
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offset += align - mod;
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size += align - mod;
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}
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offset = growUp? firstOffset + offset
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: firstOffset - offset;
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offsets[val] = offset;
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offsets[val] = offset;
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incrementAutomaticVarsSize(size);
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incrementAutomaticVarsSize(size);
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}
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}
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return offset;
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return offset;
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