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| author | Akira Hatanaka <ahatanaka@mips.com> | 2011-12-20 22:25:50 +0000 |
|---|---|---|
| committer | Akira Hatanaka <ahatanaka@mips.com> | 2011-12-20 22:25:50 +0000 |
| commit | dac1d48d8de655c24edcaf4180db8e4085e946a1 (patch) | |
| tree | 1e55191d4fadf120afe056225dd7de44c3e71c80 /llvm/lib | |
| parent | 028b9e1d0a7d18be9763bb0285cf4a9b8c0b9e12 (diff) | |
| download | bcm5719-llvm-dac1d48d8de655c24edcaf4180db8e4085e946a1.tar.gz bcm5719-llvm-dac1d48d8de655c24edcaf4180db8e4085e946a1.zip | |
Add code in MipsDAGToDAGISel for selecting constant +0.0.
MIPS64 can generate constant +0.0 with a single DMTC1 instruction.
llvm-svn: 146999
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/Mips/MipsISelDAGToDAG.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/MipsISelDAGToDAG.cpp b/llvm/lib/Target/Mips/MipsISelDAGToDAG.cpp index b33a4e6c09b..8f3cb557150 100644 --- a/llvm/lib/Target/Mips/MipsISelDAGToDAG.cpp +++ b/llvm/lib/Target/Mips/MipsISelDAGToDAG.cpp @@ -293,6 +293,12 @@ SDNode* MipsDAGToDAGISel::Select(SDNode *Node) { case ISD::ConstantFP: { ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(Node); if (Node->getValueType(0) == MVT::f64 && CN->isExactlyValue(+0.0)) { + if (Subtarget.hasMips64()) { + SDValue Zero = CurDAG->getCopyFromReg(CurDAG->getEntryNode(), dl, + Mips::ZERO_64, MVT::i64); + return CurDAG->getMachineNode(Mips::DMTC1, dl, MVT::f64, Zero); + } + SDValue Zero = CurDAG->getCopyFromReg(CurDAG->getEntryNode(), dl, Mips::ZERO, MVT::i32); return CurDAG->getMachineNode(Mips::BuildPairF64, dl, MVT::f64, Zero, |
