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Must generate an instruction for GetElementPtr if single user is not

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a memory instruction!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1238 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2001-11-10 01:05:26 +00:00
parent aa12a78a36
commit 671b16d055
1 changed files with 20 additions and 10 deletions
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30
lib/Target/SparcV9/SparcV9InstrSelection.cpp
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@ -1819,16 +1819,26 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
case 56: // reg: GetElemPtrIdx(reg,reg) case 56: // reg: GetElemPtrIdx(reg,reg)
if (subtreeRoot->parent() != NULL) if (subtreeRoot->parent() != NULL)
{ {
// Check if the parent was an array access. // If the parent was a memory operation and not an array access,
// If so, we still need to generate this instruction. // the parent will fold this instruction in so generate nothing.
MemAccessInst* memInst = (MemAccessInst*) //
subtreeRoot->getInstruction(); Instruction* parent =
const PointerType* ptrType = cast<Instruction>(subtreeRoot->parent()->getValue());
(const PointerType*) memInst->getPtrOperand()->getType(); if (parent->getOpcode() == Instruction::Load ||
if (! ptrType->getValueType()->isArrayType()) parent->getOpcode() == Instruction::Store ||
{// we don't need a separate instr parent->getOpcode() == Instruction::GetElementPtr)
numInstr = 0; // don't forward operand! {
break; // 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 // else in all other cases we need to a separate ADD instruction