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Use the default impl of DYNAMIC_STACKALLOC, allowing us to delete some code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25334 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-01-15 09:02:48 +00:00
parent e112552b5a
commit b22c08b808
2 changed files with 4 additions and 41 deletions
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38
lib/Target/PowerPC/PPCISelDAGToDAG.cpp
View File

@ -96,7 +96,6 @@ namespace {
#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 @@ static unsigned getCRIdxForSetCC(ISD::CondCode CC, bool& Inv) {
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 @@ SDOperand PPCDAGToDAGISel::Select(SDOperand Op) {
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);

7
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -110,9 +110,10 @@ PPCTargetLowering::PPCTargetLowering(TargetMachine &TM)
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.