mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-17 05:29:24 +00:00
Use Dan's supperior check
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57255 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
82cf32e5ef
commit
2163ca11d5
@ -6441,22 +6441,18 @@ void SelectionDAGLegalize::ExpandOp(SDValue Op, SDValue &Lo, SDValue &Hi){
|
||||
LoOps[1] = RHSL;
|
||||
HiOps[0] = LHSH;
|
||||
HiOps[1] = RHSH;
|
||||
|
||||
//cascaded check to see if any smaller size has a a carry flag.
|
||||
unsigned OpV = Node->getOpcode() == ISD::ADD ? ISD::ADDC : ISD::SUBC;
|
||||
bool hasCarry = false;
|
||||
if (NVT == MVT::i64)
|
||||
hasCarry = TLI.isOperationLegal(OpV, MVT::i64)
|
||||
| TLI.isOperationLegal(OpV, MVT::i32)
|
||||
| TLI.isOperationLegal(OpV, MVT::i16)
|
||||
| TLI.isOperationLegal(OpV, MVT::i8);
|
||||
if (NVT == MVT::i32)
|
||||
hasCarry = TLI.isOperationLegal(OpV, MVT::i32)
|
||||
| TLI.isOperationLegal(OpV, MVT::i16)
|
||||
| TLI.isOperationLegal(OpV, MVT::i8);
|
||||
if (NVT == MVT::i16)
|
||||
hasCarry = TLI.isOperationLegal(OpV, MVT::i16)
|
||||
| TLI.isOperationLegal(OpV, MVT::i8);
|
||||
|
||||
for (unsigned BitSize = NVT.getSizeInBits(); BitSize != 0; BitSize /= 2) {
|
||||
MVT AVT = MVT::getIntegerVT(BitSize);
|
||||
if (TLI.isOperationLegal(OpV, AVT)) {
|
||||
hasCarry = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if(hasCarry) {
|
||||
if (Node->getOpcode() == ISD::ADD) {
|
||||
Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
|
||||
|
Loading…
Reference in New Issue
Block a user