Initial CodeGen support for CTTZ/CTLZ where a zero input produces an

[oota-llvm.git] / lib / Target / ARM / ARMISelLowering.cpp

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 229d8cf138993a319c23e9e40b83ef1668c68638..857eb7ade286be54d5569f03952bf10e862b179e 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -609,6 +609,10 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
   if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
     setOperationAction(ISD::CTLZ, MVT::i32, Expand);
 
+  // These just redirect to CTTZ and CTLZ on ARM.
+  setOperationAction(ISD::CTTZ_ZERO_UNDEF  , MVT::i32  , Expand);
+  setOperationAction(ISD::CTLZ_ZERO_UNDEF  , MVT::i32  , Expand);
+
   // Only ARMv6 has BSWAP.
   if (!Subtarget->hasV6Ops())
     setOperationAction(ISD::BSWAP, MVT::i32, Expand);