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author | Tom Stellard <thomas.stellard@amd.com> | 2013-06-03 17:39:50 +0000 |
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committer | Tom Stellard <thomas.stellard@amd.com> | 2013-06-03 17:39:50 +0000 |
commit | 051a28e0e8a5a6f41d9360a58079af6231557152 (patch) | |
tree | bda494f6b261bede1550c797b061f970f17022fa /lib | |
parent | 8a72c73032707c7b3c042b716286a1ac33720991 (diff) | |
download | llvm-051a28e0e8a5a6f41d9360a58079af6231557152.tar.gz llvm-051a28e0e8a5a6f41d9360a58079af6231557152.tar.bz2 llvm-051a28e0e8a5a6f41d9360a58079af6231557152.tar.xz |
R600/SI: Handle nodes with glue results correctly SITargetLowering::foldOperands()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183133 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Target/R600/SIISelLowering.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp index 826ed9acd3..d2cf0dcf20 100644 --- a/lib/Target/R600/SIISelLowering.cpp +++ b/lib/Target/R600/SIISelLowering.cpp @@ -700,6 +700,22 @@ SDNode *SITargetLowering::foldOperands(MachineSDNode *Node, for (unsigned i = NumOps - NumDefs, e = Node->getNumOperands(); i < e; ++i) Ops.push_back(Node->getOperand(i)); + // Nodes that have a glue result are not CSE'd by getMachineNode(), so in + // this case a brand new node is always be created, even if the operands + // are the same as before. So, manually check if anything has been changed. + if (Desc->Opcode == Opcode) { + bool Changed = false; + for (unsigned i = 0, e = Node->getNumOperands(); i < e; ++i) { + if (Ops[i].getNode() != Node->getOperand(i).getNode()) { + Changed = true; + break; + } + } + if (!Changed) { + return Node; + } + } + // Create a complete new instruction return DAG.getMachineNode(Desc->Opcode, SDLoc(Node), Node->getVTList(), Ops); } |