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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 | d34167a4abbe576bef7dbe1b88771f09afc82a72 (patch) | |
| tree | 8221313800633abe7deed8d5b39e331ccd2a645b /lib/CodeGen/SelectionDAG | |
| parent | da4d2f63d8b138569ec732d970bb452a0403a3ab (diff) | |
| download | external_llvm-d34167a4abbe576bef7dbe1b88771f09afc82a72.tar.gz external_llvm-d34167a4abbe576bef7dbe1b88771f09afc82a72.tar.bz2 external_llvm-d34167a4abbe576bef7dbe1b88771f09afc82a72.zip | |
Do not emit bit tests if target does not support natively left shift
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71240 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp index fd89108392..d0fd6b4f64 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp +++ b/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) { |