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| author | Chris Lattner <sabre@nondot.org> | 2005-01-19 18:01:40 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-01-19 18:01:40 +0000 |
| commit | 39908e0ce0d8bd9de3c53271f0d27ab9d75816ad (patch) | |
| tree | 7978da7992cd357e9e2bb09e551c8407dbdb96bd /lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 88218ef706ba6fffc3b3f3c894910eea0f59abb1 (diff) | |
| download | external_llvm-39908e0ce0d8bd9de3c53271f0d27ab9d75816ad.tar.gz external_llvm-39908e0ce0d8bd9de3c53271f0d27ab9d75816ad.tar.bz2 external_llvm-39908e0ce0d8bd9de3c53271f0d27ab9d75816ad.zip | |
Know some identities about tokenfactor nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19699 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 3b106d192d..762061fa0c 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -549,6 +549,10 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N1, SDOperand N2) { #ifndef NDEBUG switch (Opcode) { + case ISD::TokenFactor: + assert(VT == MVT::Other && N1.getValueType() == MVT::Other && + N2.getValueType() == MVT::Other && "Invalid token factor!"); + break; case ISD::AND: case ISD::OR: case ISD::XOR: @@ -739,6 +743,13 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, // Finally, fold operations that do not require constants. switch (Opcode) { + case ISD::TokenFactor: + if (N1.getOpcode() == ISD::EntryToken) + return N2; + if (N2.getOpcode() == ISD::EntryToken) + return N1; + break; + case ISD::AND: case ISD::OR: if (SetCCSDNode *LHS = dyn_cast<SetCCSDNode>(N1.Val)) |