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Implement DYNAMIC_STACKALLOC, wrap some long lines

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23136 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-29 23:30:11 +00:00
parent 82e14db9a9
commit 9c2dece8e2
1 changed files with 35 additions and 2 deletions
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37
lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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@ -738,6 +738,37 @@ SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
CurDAG->SelectNodeTo(N, PPC::LA, MVT::i32, Tmp, GA);
break;
}
case ISD::DYNAMIC_STACKALLOC: {
// 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);
// 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, R1Reg);
// 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.
CurDAG->ReplaceAllUsesWith(N, Result.Val);
N = Result.Val;
break;
}
case ISD::SIGN_EXTEND_INREG:
switch(cast<VTSDNode>(N->getOperand(1))->getVT()) {
default: assert(0 && "Illegal type in SIGN_EXTEND_INREG"); break;
@ -1101,8 +1132,10 @@ SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
int FrameIdx = BB->getParent()->getFrameInfo()->CreateStackObject(8, 8);
SDOperand FI = CurDAG->getTargetFrameIndex(FrameIdx, MVT::f64);
SDOperand ST = CurDAG->getTargetNode(PPC::STFD, MVT::Other, In, getI32Imm(0), FI);
CurDAG->SelectNodeTo(N, PPC::LWZ, MVT::i32, MVT::Other, getI32Imm(4), FI, ST);
SDOperand ST = CurDAG->getTargetNode(PPC::STFD, MVT::Other, In,
getI32Imm(0), FI);
CurDAG->SelectNodeTo(N, PPC::LWZ, MVT::i32, MVT::Other,
getI32Imm(4), FI, ST);
break;
}
case ISD::FNEG: {