Must generate an instruction for GetElementPtr if single user is not
a memory instruction! llvm-svn: 1238
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@ -1819,16 +1819,26 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
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case 56: // reg: GetElemPtrIdx(reg,reg)
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if (subtreeRoot->parent() != NULL)
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{
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// Check if the parent was an array access.
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// If so, we still need to generate this instruction.
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MemAccessInst* memInst = (MemAccessInst*)
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subtreeRoot->getInstruction();
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const PointerType* ptrType =
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(const PointerType*) memInst->getPtrOperand()->getType();
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if (! ptrType->getValueType()->isArrayType())
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{// we don't need a separate instr
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numInstr = 0; // don't forward operand!
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break;
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// If the parent was a memory operation and not an array access,
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// the parent will fold this instruction in so generate nothing.
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//
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Instruction* parent =
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cast<Instruction>(subtreeRoot->parent()->getValue());
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if (parent->getOpcode() == Instruction::Load ||
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parent->getOpcode() == Instruction::Store ||
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parent->getOpcode() == Instruction::GetElementPtr)
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{
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// Check if the parent is an array access,
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// If so, we still need to generate this instruction.
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GetElementPtrInst* getElemInst =
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cast<GetElementPtrInst>(subtreeRoot->getInstruction());
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const PointerType* ptrType =
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(const PointerType*) getElemInst->getPtrOperand()->getType();
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if (! ptrType->getValueType()->isArrayType())
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{// we don't need a separate instr
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numInstr = 0; // don't forward operand!
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break;
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}
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}
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}
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// else in all other cases we need to a separate ADD instruction
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