diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 5bd3e2b6711..251064b3bb0 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -380,14 +380,19 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM) setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom); setOperationAction(ISD::CTTZ , MVT::i8 , Custom); - setOperationAction(ISD::CTLZ , MVT::i8 , Custom); setOperationAction(ISD::CTTZ , MVT::i16 , Custom); - setOperationAction(ISD::CTLZ , MVT::i16 , Custom); setOperationAction(ISD::CTTZ , MVT::i32 , Custom); - setOperationAction(ISD::CTLZ , MVT::i32 , Custom); - if (Subtarget->is64Bit()) { + if (Subtarget->is64Bit()) setOperationAction(ISD::CTTZ , MVT::i64 , Custom); - setOperationAction(ISD::CTLZ , MVT::i64 , Custom); + + if (Subtarget->hasLZCNT()) { + setOperationAction(ISD::CTLZ , MVT::i8 , Promote); + } else { + setOperationAction(ISD::CTLZ , MVT::i8 , Custom); + setOperationAction(ISD::CTLZ , MVT::i16 , Custom); + setOperationAction(ISD::CTLZ , MVT::i32 , Custom); + if (Subtarget->is64Bit()) + setOperationAction(ISD::CTLZ , MVT::i64 , Custom); } if (Subtarget->hasPOPCNT()) { |
