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Start implementing truncating stores and extending loads.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19559 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-14 22:08:15 +00:00
parent 1cff05c7c2
commit 2ee743ff9b
2 changed files with 72 additions and 7 deletions
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10
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -247,7 +247,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
case ISD::ImplicitDef:
Tmp1 = LegalizeOp(Node->getOperand(0));
if (Tmp1 != Node->getOperand(0))
Result = DAG.getImplicitDef(cast<RegSDNode>(Node)->getReg());
Result = DAG.getImplicitDef(Tmp1, cast<RegSDNode>(Node)->getReg());
break;
case ISD::Constant:
// We know we don't need to expand constants here, constants only have one
@ -525,18 +525,16 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Result = DAG.getNode(ISD::STORE, MVT::Other, Result, Hi, Tmp2);
}
break;
case ISD::SELECT: {
case ISD::SELECT:
// FIXME: BOOLS MAY REQUIRE PROMOTION!
Tmp1 = LegalizeOp(Node->getOperand(0)); // Cond
Tmp2 = LegalizeOp(Node->getOperand(1)); // TrueVal
SDOperand Tmp3 = LegalizeOp(Node->getOperand(2)); // FalseVal
Tmp3 = LegalizeOp(Node->getOperand(2)); // FalseVal
if (Tmp1 != Node->getOperand(0) ||
Tmp2 != Node->getOperand(1) ||
if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1) ||
Tmp3 != Node->getOperand(2))
Result = DAG.getNode(ISD::SELECT, Node->getValueType(0), Tmp1, Tmp2,Tmp3);
break;
}
case ISD::SETCC:
switch (getTypeAction(Node->getOperand(0).getValueType())) {
case Legal:

67
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -833,6 +833,68 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
}
}
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,SDOperand N1,
SDOperand N2, MVT::ValueType EVT) {
switch (Opcode) {
default: assert(0 && "Bad opcode for this accessor!");
case ISD::EXTLOAD:
case ISD::SEXTLOAD:
case ISD::ZEXTLOAD:
// If they are asking for an extending loat from/to the same thing, return a
// normal load.
if (VT == EVT)
return getNode(ISD::LOAD, VT, N1, N2);
assert(EVT < VT && "Should only be an extending load, not truncating!");
assert((Opcode == ISD::EXTLOAD || MVT::isInteger(VT)) &&
"Cannot sign/zero extend a FP load!");
assert(MVT::isInteger(VT) == MVT::isInteger(EVT) &&
"Cannot convert from FP to Int or Int -> FP!");
break;
}
EVTStruct NN;
NN.Opcode = Opcode;
NN.VT = VT;
NN.EVT = EVT;
NN.Ops.push_back(N1);
NN.Ops.push_back(N2);
SDNode *&N = MVTSDNodes[NN];
if (N) return SDOperand(N, 0);
N = new MVTSDNode(Opcode, VT, N1, N2, EVT);
AllNodes.push_back(N);
return SDOperand(N, 0);
}
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,SDOperand N1,
SDOperand N2, SDOperand N3, MVT::ValueType EVT) {
switch (Opcode) {
default: assert(0 && "Bad opcode for this accessor!");
case ISD::TRUNCSTORE:
if (N1.getValueType() == EVT) // Normal store?
return getNode(ISD::STORE, VT, N1, N2, N3);
assert(N1.getValueType() > EVT && "Not a truncation?");
assert(MVT::isInteger(N1.getValueType()) == MVT::isInteger(EVT) &&
"Can't do FP-INT conversion!");
break;
}
EVTStruct NN;
NN.Opcode = Opcode;
NN.VT = VT;
NN.EVT = EVT;
NN.Ops.push_back(N1);
NN.Ops.push_back(N2);
NN.Ops.push_back(N3);
SDNode *&N = MVTSDNodes[NN];
if (N) return SDOperand(N, 0);
N = new MVTSDNode(Opcode, VT, N1, N2, N3, EVT);
AllNodes.push_back(N);
return SDOperand(N, 0);
}
/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
/// indicated value. This method ignores uses of other values defined by this
/// operation.
@ -923,6 +985,11 @@ const char *SDNode::getOperationName() const {
// Other operators
case ISD::LOAD: return "load";
case ISD::STORE: return "store";
case ISD::EXTLOAD: return "extload";
case ISD::SEXTLOAD: return "sextload";
case ISD::ZEXTLOAD: return "zextload";
case ISD::TRUNCSTORE: return "truncstore";
case ISD::DYNAMIC_STACKALLOC: return "dynamic_stackalloc";
case ISD::EXTRACT_ELEMENT: return "extract_element";
case ISD::BUILD_PAIR: return "build_pair";