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| author | Anton Korobeynikov <asl@math.spbu.ru> | 2009-05-08 18:51:34 +0000 |
|---|---|---|
| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2009-05-08 18:51:34 +0000 |
| commit | c94dbf5ba0ebf8f1a0ff845512b00a41fe8aa634 (patch) | |
| tree | 718f7bcd3281dcf548571b81d529113185a4270e /llvm/lib/CodeGen | |
| parent | ea618dd0ba5cb5ba5f6772fc51eb4703e714cd72 (diff) | |
| download | bcm5719-llvm-c94dbf5ba0ebf8f1a0ff845512b00a41fe8aa634.tar.gz bcm5719-llvm-c94dbf5ba0ebf8f1a0ff845512b00a41fe8aa634.zip | |
Do not emit bit tests if target does not support natively left shift
llvm-svn: 71240
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp index fd89108392c..d0fd6b4f64c 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp @@ -1923,6 +1923,10 @@ bool SelectionDAGLowering::handleBitTestsSwitchCase(CaseRec& CR, // inserting any additional MBBs necessary to represent the switch. MachineFunction *CurMF = CurMBB->getParent(); + // If target does not have legal shift left, do not emit bit tests at all. + if (!TLI.isOperationLegal(ISD::SHL, TLI.getPointerTy())) + return false; + size_t numCmps = 0; for (CaseItr I = CR.Range.first, E = CR.Range.second; I!=E; ++I) { |
