6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-12 18:33:22 +00:00
Code Issues Projects Releases Wiki Activity

Fix libcall code to not pass a NULL Chain to LowerCallTo

Browse Source 
Fix libcall code to not crash or assert looking for an ADJCALLSTACKUP node
  when it is known that there is no ADJCALLSTACKDOWN to match.
Expand i64 multiply when ISD::MULHU is legal for the target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21214 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-04-11 03:01:51 +00:00
parent 2bb6f41282
commit c7c16575fe
1 changed files with 30 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -910,6 +910,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
case ISD::ADD:
case ISD::SUB:
case ISD::MUL:
case ISD::MULHS:
case ISD::MULHU:
case ISD::UDIV:
case ISD::SDIV:
case ISD::AND:
@ -1678,12 +1680,20 @@ static SDNode *FindAdjCallStackUp(SDNode *Node) {
static SDOperand FindInputOutputChains(SDNode *OpNode, SDNode *&OutChain,
SDOperand Entry) {
SDNode *LatestAdjCallStackDown = Entry.Val;
SDNode *LatestAdjCallStackUp = 0;
FindLatestAdjCallStackDown(OpNode, LatestAdjCallStackDown);
//std::cerr << "Found node: "; LatestAdjCallStackDown->dump(); std::cerr <<"\n";
SDNode *LatestAdjCallStackUp = FindAdjCallStackUp(LatestAdjCallStackDown);
// It is possible that no ISD::ADJCALLSTACKDOWN was found because there is no
// previous call in the function. LatestCallStackDown may in that case be
// the entry node itself. Do not attempt to find a matching ADJCALLSTACKUP
// unless LatestCallStackDown is an ADJCALLSTACKDOWN.
if (LatestAdjCallStackDown->getOpcode() == ISD::ADJCALLSTACKDOWN)
LatestAdjCallStackUp = FindAdjCallStackUp(LatestAdjCallStackDown);
else
LatestAdjCallStackUp = Entry.Val;
assert(LatestAdjCallStackUp && "NULL return from FindAdjCallStackUp");
SDNode *EarliestAdjCallStackUp = 0;
FindEarliestAdjCallStackUp(OpNode, EarliestAdjCallStackUp);
@ -2042,7 +2052,22 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
ExpandByParts(ISD::SUB_PARTS, Node->getOperand(0), Node->getOperand(1),
Lo, Hi);
break;
case ISD::MUL: Lo = ExpandLibCall("__muldi3" , Node, Hi); break;
case ISD::MUL: {
if (TLI.getOperationAction(ISD::MULHU, NVT) == TargetLowering::Legal) {
SDOperand LL, LH, RL, RH;
ExpandOp(Node->getOperand(0), LL, LH);
ExpandOp(Node->getOperand(1), RL, RH);
Hi = DAG.getNode(ISD::MULHU, NVT, LL, RL);
RH = DAG.getNode(ISD::MUL, NVT, LL, RH);
LH = DAG.getNode(ISD::MUL, NVT, LH, RL);
Hi = DAG.getNode(ISD::ADD, NVT, Hi, RH);
Hi = DAG.getNode(ISD::ADD, NVT, Hi, LH);
Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
} else {
Lo = ExpandLibCall("__muldi3" , Node, Hi); break;
}
break;
}
case ISD::SDIV: Lo = ExpandLibCall("__divdi3" , Node, Hi); break;
case ISD::UDIV: Lo = ExpandLibCall("__udivdi3", Node, Hi); break;
case ISD::SREM: Lo = ExpandLibCall("__moddi3" , Node, Hi); break;