diff options
| author | Dan Gohman <gohman@apple.com> | 2010-11-11 16:24:49 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-11-11 16:24:49 +0000 |
| commit | efb8a9d0c2c6be209c6e34f4249ff14fc232bf9f (patch) | |
| tree | d32f53ed23608726dc372527174dea5ae869ae83 /lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | |
| parent | 5aae3dcb53b89344d598eee7e1021dce7ec6345c (diff) | |
Remove the memmove->memcpy optimization from CodeGen. MemCpyOpt does this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118789 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index b9dbfc0f36..62d2cb9a79 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -4086,20 +4086,6 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) { SDValue Op3 = getValue(I.getArgOperand(2)); unsigned Align = cast<ConstantInt>(I.getArgOperand(3))->getZExtValue(); bool isVol = cast<ConstantInt>(I.getArgOperand(4))->getZExtValue(); - - // If the source and destination are known to not be aliases, we can - // lower memmove as memcpy. - uint64_t Size = -1ULL; - if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op3)) - Size = C->getZExtValue(); - if (AA->alias(I.getArgOperand(0), Size, I.getArgOperand(1), Size) == - AliasAnalysis::NoAlias) { - DAG.setRoot(DAG.getMemcpy(getRoot(), dl, Op1, Op2, Op3, Align, isVol, - false, MachinePointerInfo(I.getArgOperand(0)), - MachinePointerInfo(I.getArgOperand(1)))); - return 0; - } - DAG.setRoot(DAG.getMemmove(getRoot(), dl, Op1, Op2, Op3, Align, isVol, MachinePointerInfo(I.getArgOperand(0)), MachinePointerInfo(I.getArgOperand(1)))); |