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Fix spelling, fix some broken canonicalizations by my last patch

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22734 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-09 23:09:05 +00:00
parent 4cf009f49c
commit bd8625b062
1 changed files with 11 additions and 12 deletions
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23
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -386,8 +386,8 @@ SDOperand SelectionDAG::getCondCode(ISD::CondCode Cond) {
return SDOperand(CondCodeNodes[Cond], 0); return SDOperand(CondCodeNodes[Cond], 0);
} }
SDOperand SelectionDAG::SimplfySetCC(MVT::ValueType VT, SDOperand N1, SDOperand SelectionDAG::SimplifySetCC(MVT::ValueType VT, SDOperand N1,
SDOperand N2, ISD::CondCode Cond) { SDOperand N2, ISD::CondCode Cond) {
// These setcc operations always fold. // These setcc operations always fold.
switch (Cond) { switch (Cond) {
default: break; default: break;
@ -484,17 +484,15 @@ SDOperand SelectionDAG::SimplfySetCC(MVT::ValueType VT, SDOperand N1,
if (Cond == ISD::SETGE || Cond == ISD::SETUGE) { if (Cond == ISD::SETGE || Cond == ISD::SETUGE) {
if (C2 == MinVal) return getConstant(1, VT); // X >= MIN --> true if (C2 == MinVal) return getConstant(1, VT); // X >= MIN --> true
--C2; // X >= C1 --> X > (C1-1) --C2; // X >= C1 --> X > (C1-1)
Cond = (Cond == ISD::SETGE) ? ISD::SETGT : ISD::SETUGT; return getSetCC(VT, N1, getConstant(C2, N2.getValueType()),
N2 = getConstant(C2, N2.getValueType()); (Cond == ISD::SETGE) ? ISD::SETGT : ISD::SETUGT);
N2C = cast<ConstantSDNode>(N2.Val);
} }
if (Cond == ISD::SETLE || Cond == ISD::SETULE) { if (Cond == ISD::SETLE || Cond == ISD::SETULE) {
if (C2 == MaxVal) return getConstant(1, VT); // X <= MAX --> true if (C2 == MaxVal) return getConstant(1, VT); // X <= MAX --> true
++C2; // X <= C1 --> X < (C1+1) ++C2; // X <= C1 --> X < (C1+1)
Cond = (Cond == ISD::SETLE) ? ISD::SETLT : ISD::SETULT; return getSetCC(VT, N1, getConstant(C2, N2.getValueType()),
N2 = getConstant(C2, N2.getValueType()); (Cond == ISD::SETLE) ? ISD::SETLT : ISD::SETULT);
N2C = cast<ConstantSDNode>(N2.Val);
} }
if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal) if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal)
@ -566,8 +564,7 @@ SDOperand SelectionDAG::SimplfySetCC(MVT::ValueType VT, SDOperand N1,
} }
} else { } else {
// Ensure that the constant occurs on the RHS. // Ensure that the constant occurs on the RHS.
Cond = ISD::getSetCCSwappedOperands(Cond); return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond));
std::swap(N1, N2);
} }
if (N1 == N2) { if (N1 == N2) {
@ -581,7 +578,9 @@ SDOperand SelectionDAG::SimplfySetCC(MVT::ValueType VT, SDOperand N1,
return getConstant(UOF, VT); return getConstant(UOF, VT);
// Otherwise, we can't fold it. However, we can simplify it to SETUO/SETO // Otherwise, we can't fold it. However, we can simplify it to SETUO/SETO
// if it is not already. // if it is not already.
Cond = UOF == 0 ? ISD::SETUO : ISD::SETO; ISD::CondCode NewCond = UOF == 0 ? ISD::SETUO : ISD::SETO;
if (NewCond != Cond)
return getSetCC(VT, N1, N2, NewCond);
} }
if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) && if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) &&
@ -1356,7 +1355,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
switch (Opcode) { switch (Opcode) {
case ISD::SETCC: { case ISD::SETCC: {
// Use SimplifySetCC to simplify SETCC's. // Use SimplifySetCC to simplify SETCC's.
SDOperand Simp = SimplfySetCC(VT, N1, N2, cast<CondCodeSDNode>(N3)->get()); SDOperand Simp = SimplifySetCC(VT, N1, N2, cast<CondCodeSDNode>(N3)->get());
if (Simp.Val) return Simp; if (Simp.Val) return Simp;
break; break;
} }