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Must generate an instruction for GetElementPtr if single user is not 

a memory instruction!

llvm-svn: 1238
This commit is contained in:
Vikram S. Adve 2001-11-10 01:05:26 +00:00
parent 1812fc499d
commit 209d8e1c3b
1 changed files with 20 additions and 10 deletions
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30
llvm/lib/Target/Sparc/SparcInstrSelection.cpp
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@ -1819,16 +1819,26 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
case 56: // reg: GetElemPtrIdx(reg,reg)
if (subtreeRoot->parent() != NULL)
{
// Check if the parent was an array access.
// If so, we still need to generate this instruction.
MemAccessInst* memInst = (MemAccessInst*)
subtreeRoot->getInstruction();
const PointerType* ptrType =
(const PointerType*) memInst->getPtrOperand()->getType();
if (! ptrType->getValueType()->isArrayType())
{// we don't need a separate instr
numInstr = 0; // don't forward operand!
break;
// If the parent was a memory operation and not an array access,
// the parent will fold this instruction in so generate nothing.
//
Instruction* parent =
cast<Instruction>(subtreeRoot->parent()->getValue());
if (parent->getOpcode() == Instruction::Load ||
parent->getOpcode() == Instruction::Store ||
parent->getOpcode() == Instruction::GetElementPtr)
{
// Check if the parent is an array access,
// If so, we still need to generate this instruction.
GetElementPtrInst* getElemInst =
cast<GetElementPtrInst>(subtreeRoot->getInstruction());
const PointerType* ptrType =
(const PointerType*) getElemInst->getPtrOperand()->getType();
if (! ptrType->getValueType()->isArrayType())
{// we don't need a separate instr
numInstr = 0; // don't forward operand!
break;
}
}
}
// else in all other cases we need to a separate ADD instruction