Use the default impl of DYNAMIC_STACKALLOC, allowing us to delete some code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25334 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index 2d74a32..92512cc 100644
--- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -96,7 +96,6 @@
#include "PPCGenDAGISel.inc"
private:
- SDOperand SelectDYNAMIC_STACKALLOC(SDOperand Op);
SDOperand SelectADD_PARTS(SDOperand Op);
SDOperand SelectSUB_PARTS(SDOperand Op);
SDOperand SelectSETCC(SDOperand Op);
@@ -531,42 +530,6 @@
return 0;
}
-SDOperand PPCDAGToDAGISel::SelectDYNAMIC_STACKALLOC(SDOperand Op) {
- SDNode *N = Op.Val;
-
- // FIXME: We are currently ignoring the requested alignment for handling
- // greater than the stack alignment. This will need to be revisited at some
- // point. Align = N.getOperand(2);
- if (!isa<ConstantSDNode>(N->getOperand(2)) ||
- cast<ConstantSDNode>(N->getOperand(2))->getValue() != 0) {
- std::cerr << "Cannot allocate stack object with greater alignment than"
- << " the stack alignment yet!";
- abort();
- }
- SDOperand Chain = Select(N->getOperand(0));
- SDOperand Amt = Select(N->getOperand(1));
-
- SDOperand R1Reg = CurDAG->getRegister(PPC::R1, MVT::i32);
-
- SDOperand R1Val = CurDAG->getCopyFromReg(Chain, PPC::R1, MVT::i32);
- Chain = R1Val.getValue(1);
-
- // Subtract the amount (guaranteed to be a multiple of the stack alignment)
- // from the stack pointer, giving us the result pointer.
- SDOperand Result = CurDAG->getTargetNode(PPC::SUBF, MVT::i32, Amt, R1Val);
-
- // Copy this result back into R1.
- Chain = CurDAG->getNode(ISD::CopyToReg, MVT::Other, Chain, R1Reg, Result);
-
- // Copy this result back out of R1 to make sure we're not using the stack
- // space without decrementing the stack pointer.
- Result = CurDAG->getCopyFromReg(Chain, PPC::R1, MVT::i32);
-
- // Finally, replace the DYNAMIC_STACKALLOC with the copyfromreg.
- CodeGenMap[Op.getValue(0)] = Result;
- CodeGenMap[Op.getValue(1)] = Result.getValue(1);
- return SDOperand(Result.Val, Op.ResNo);
-}
SDOperand PPCDAGToDAGISel::SelectADD_PARTS(SDOperand Op) {
SDNode *N = Op.Val;
@@ -854,7 +817,6 @@
switch (N->getOpcode()) {
default: break;
- case ISD::DYNAMIC_STACKALLOC: return SelectDYNAMIC_STACKALLOC(Op);
case ISD::ADD_PARTS: return SelectADD_PARTS(Op);
case ISD::SUB_PARTS: return SelectSUB_PARTS(Op);
case ISD::SETCC: return SelectSETCC(Op);
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 7991821..b41ef3f 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -110,9 +110,10 @@
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
- // Not implemented yet.
- setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
- setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
+ // Use the default implementation.
+ setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
+ setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
+ setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Expand);
if (TM.getSubtarget<PPCSubtarget>().is64Bit()) {
// They also have instructions for converting between i64 and fp.