forked from OSchip/llvm-project
Implement (most of) selection of inline asm memory operands.
llvm-svn: 26350
This commit is contained in:
parent
dc445eadc0
commit
dcf785bf46
llvm/lib/CodeGen/SelectionDAG
|
@ -2437,3 +2437,45 @@ void SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &DAG) {
|
|||
BB = SL->Run();
|
||||
delete SL;
|
||||
}
|
||||
|
||||
/// SelectInlineAsmMemoryOperands - Calls to this are automatically generated
|
||||
/// by tblgen. Others should not call it.
|
||||
void SelectionDAGISel::
|
||||
SelectInlineAsmMemoryOperands(std::vector<SDOperand> &Ops, SelectionDAG &DAG) {
|
||||
std::vector<SDOperand> InOps;
|
||||
std::swap(InOps, Ops);
|
||||
|
||||
Ops.push_back(InOps[0]); // input chain.
|
||||
Ops.push_back(InOps[1]); // input asm string.
|
||||
|
||||
const char *AsmStr = cast<ExternalSymbolSDNode>(InOps[1])->getSymbol();
|
||||
unsigned i = 2, e = InOps.size();
|
||||
if (InOps[e-1].getValueType() == MVT::Flag)
|
||||
--e; // Don't process a flag operand if it is here.
|
||||
|
||||
while (i != e) {
|
||||
unsigned Flags = cast<ConstantSDNode>(InOps[i])->getValue();
|
||||
if ((Flags & 7) != 4 /*MEM*/) {
|
||||
// Just skip over this operand, copying the operands verbatim.
|
||||
Ops.insert(Ops.end(), InOps.begin()+i, InOps.begin()+i+(Flags >> 3) + 1);
|
||||
i += (Flags >> 3) + 1;
|
||||
} else {
|
||||
assert((Flags >> 3) == 1 && "Memory operand with multiple values?");
|
||||
// Otherwise, this is a memory operand. Ask the target to select it.
|
||||
std::vector<SDOperand> SelOps;
|
||||
if (SelectInlineAsmMemoryOperand(InOps[i+1], 'm', SelOps, DAG)) {
|
||||
std::cerr << "Could not match memory address. Inline asm failure!\n";
|
||||
exit(1);
|
||||
}
|
||||
|
||||
// Add this to the output node.
|
||||
Ops.push_back(DAG.getConstant(4/*MEM*/ | (SelOps.size() << 3), MVT::i32));
|
||||
Ops.insert(Ops.end(), SelOps.begin(), SelOps.end());
|
||||
i += 2;
|
||||
}
|
||||
}
|
||||
|
||||
// Add the flag input back if present.
|
||||
if (e != InOps.size())
|
||||
Ops.push_back(InOps.back());
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue