[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
Chris Lattner
sabre at nondot.org
Thu May 17 11:16:00 PDT 2007
Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.492 -> 1.493
---
Log message:
add expand support for ADDC/SUBC/ADDE/SUBE so we can codegen 128-bit add/sub on 32-bit (or less) targets
---
Diffs of the changes: (+42 -0)
LegalizeDAG.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.492 llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.493
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.492 Sat May 5 14:39:05 2007
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Thu May 17 13:15:41 2007
@@ -5222,6 +5222,48 @@
}
break;
}
+
+ case ISD::ADDC:
+ case ISD::SUBC: {
+ // Expand the subcomponents.
+ SDOperand LHSL, LHSH, RHSL, RHSH;
+ ExpandOp(Node->getOperand(0), LHSL, LHSH);
+ ExpandOp(Node->getOperand(1), RHSL, RHSH);
+ SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
+ SDOperand LoOps[2] = { LHSL, RHSL };
+ SDOperand HiOps[3] = { LHSH, RHSH };
+
+ if (Node->getOpcode() == ISD::ADDC) {
+ Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
+ HiOps[2] = Lo.getValue(1);
+ Hi = DAG.getNode(ISD::ADDE, VTList, HiOps, 3);
+ } else {
+ Lo = DAG.getNode(ISD::SUBC, VTList, LoOps, 2);
+ HiOps[2] = Lo.getValue(1);
+ Hi = DAG.getNode(ISD::SUBE, VTList, HiOps, 3);
+ }
+ // Remember that we legalized the flag.
+ AddLegalizedOperand(Op.getValue(1), LegalizeOp(Hi.getValue(1)));
+ break;
+ }
+ case ISD::ADDE:
+ case ISD::SUBE: {
+ // Expand the subcomponents.
+ SDOperand LHSL, LHSH, RHSL, RHSH;
+ ExpandOp(Node->getOperand(0), LHSL, LHSH);
+ ExpandOp(Node->getOperand(1), RHSL, RHSH);
+ SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
+ SDOperand LoOps[3] = { LHSL, RHSL, Node->getOperand(2) };
+ SDOperand HiOps[3] = { LHSH, RHSH };
+
+ Lo = DAG.getNode(Node->getOpcode(), VTList, LoOps, 3);
+ HiOps[2] = Lo.getValue(1);
+ Hi = DAG.getNode(Node->getOpcode(), VTList, HiOps, 3);
+
+ // Remember that we legalized the flag.
+ AddLegalizedOperand(Op.getValue(1), LegalizeOp(Hi.getValue(1)));
+ break;
+ }
case ISD::MUL: {
// If the target wants to custom expand this, let them.
if (TLI.getOperationAction(ISD::MUL, VT) == TargetLowering::Custom) {
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