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author | Tom Stellard <thomas.stellard@amd.com> | 2014-06-10 16:01:22 +0000 |
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committer | Tom Stellard <thomas.stellard@amd.com> | 2014-06-10 16:01:22 +0000 |
commit | f586a260ca729c933cb15c6e68cabe95163a6dcb (patch) | |
tree | 37baaed41e14f40cc2608c7bc0bae18bd9753163 /lib/CodeGen/SelectionDAG | |
parent | b02d95cb66157aa49bf5e50a8778c182a7b8604e (diff) | |
download | llvm-f586a260ca729c933cb15c6e68cabe95163a6dcb.tar.gz llvm-f586a260ca729c933cb15c6e68cabe95163a6dcb.tar.bz2 llvm-f586a260ca729c933cb15c6e68cabe95163a6dcb.tar.xz |
SelectionDAG: Expand SELECT_CC to SELECT + SETCC
This consolidates code from the Hexagon, R600, and XCore targets.
No functionality change intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210539 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG')
-rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index accdd0a5e8..bf7541bf28 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -3905,13 +3905,29 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node) { Tmp2 = Node->getOperand(1); // RHS Tmp3 = Node->getOperand(2); // True Tmp4 = Node->getOperand(3); // False + EVT VT = Node->getValueType(0); SDValue CC = Node->getOperand(4); + ISD::CondCode CCOp = cast<CondCodeSDNode>(CC)->get(); + + if (TLI.isCondCodeLegal(CCOp, Tmp1.getSimpleValueType())) { + // If the condition code is legal, then we need to expand this + // node using SETCC and SELECT. + EVT CmpVT = Tmp1.getValueType(); + assert(!TLI.isOperationExpand(ISD::SELECT, VT) && + "Cannot expand ISD::SELECT_CC when ISD::SELECT also needs to be " + "expanded."); + EVT CCVT = TLI.getSetCCResultType(*DAG.getContext(), CmpVT); + SDValue Cond = DAG.getNode(ISD::SETCC, dl, CCVT, Tmp1, Tmp2, CC); + Results.push_back(DAG.getSelect(dl, VT, Cond, Tmp3, Tmp4)); + break; + } + // SELECT_CC is legal, so the condition code must not be. bool Legalized = false; // Try to legalize by inverting the condition. This is for targets that // might support an ordered version of a condition, but not the unordered // version (or vice versa). - ISD::CondCode InvCC = ISD::getSetCCInverse(cast<CondCodeSDNode>(CC)->get(), + ISD::CondCode InvCC = ISD::getSetCCInverse(CCOp, Tmp1.getValueType().isInteger()); if (TLI.isCondCodeLegal(InvCC, Tmp1.getSimpleValueType())) { // Use the new condition code and swap true and false |