Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.265 -> 1.266
---
Log message:
Allow the target to specify 'expand' if they just require the amount to
be subtracted from the stack pointer.
---
Diffs of the changes: (+19 -9)
LegalizeDAG.cpp | 28 +++++++++++++++++++---------
1 files changed, 19 insertions(+), 9 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.265
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.266
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.265 Sun Jan 15 02:43:08 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Sun Jan 15 02:54:32 2006
@@ -847,22 +847,32 @@
switch (TLI.getOperationAction(Node->getOpcode(),
Node->getValueType(0))) {
default: assert(0 && "This action is not supported yet!");
- case TargetLowering::Custom: {
+ case TargetLowering::Expand: {
+ unsigned SPReg = TLI.getStackPointerRegisterToSaveRestore();
+ assert(SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and"
+ " not tell us which reg is the stack pointer!");
+ SDOperand Chain = Tmp1.getOperand(0);
+ SDOperand Size = Tmp2.getOperand(1);
+ SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, Node->getValueType(0));
+ Tmp1 = DAG.getNode(ISD::SUB, Node->getValueType(0), SP, Size); //
Value
+ Tmp2 = DAG.getCopyToReg(SP.getValue(1), SPReg, Tmp1); // Output
chain
+ break;
+ }
+ case TargetLowering::Custom:
Tmp3 = TLI.LowerOperation(Tmp1, DAG);
if (Tmp3.Val) {
Tmp1 = LegalizeOp(Tmp3);
Tmp2 = LegalizeOp(Tmp3.getValue(1));
}
- // FALLTHROUGH if the target thinks it is legal.
- }
+ break;
case TargetLowering::Legal:
- // Since this op produce two values, make sure to remember that we
- // legalized both of them.
- AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
- AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
- return Op.ResNo ? Tmp2 : Tmp1;
+ break;
}
- assert(0 && "Unreachable");
+ // Since this op produce two values, make sure to remember that we
+ // legalized both of them.
+ AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
+ AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
+ return Op.ResNo ? Tmp2 : Tmp1;
}
case ISD::TAILCALL:
case ISD::CALL: {
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
