6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-14 11:32:34 +00:00
Code Issues Projects Releases Wiki Activity

Expand fabs into fneg

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21013 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-04-02 05:26:37 +00:00
parent a7ee8b8f04
commit 4af6e0d783
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -887,8 +887,16 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp2 = DAG.getConstantFP(-0.0, Node->getValueType(0));
Result = LegalizeOp(DAG.getNode(ISD::SUB, Node->getValueType(0),
Tmp2, Tmp1));
} else if (Node->getOpcode() == ISD::FABS) {
// Expand Y = FABS(X) -> Y = (X >u 0.0) ? X : fneg(X).
MVT::ValueType VT = Node->getValueType(0);
Tmp2 = DAG.getConstantFP(0.0, VT);
Tmp2 = DAG.getSetCC(ISD::SETUGT, TLI.getSetCCResultTy(), Tmp1, Tmp2);
Tmp3 = DAG.getNode(ISD::FNEG, VT, Tmp1);
Result = DAG.getNode(ISD::SELECT, VT, Tmp2, Tmp1, Tmp3);
Result = LegalizeOp(Result);
} else {
assert(0 && "Expand fneg not impl yet!");
assert(0 && "Unreachable!");
}
break;
}