[CodeGen] Default CTTZ_ZERO_UNDEF/CTLZ_ZERO_UNDEF to Expand in TargetLoweringBase. This is what the majority of the targets want and removes a bunch of code. Set it to Legal explicitly in the few cases where that's the desired behavior.

llvm-svn: 267853

1 files changed, 1 insertions, 10 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
index fa1e275bf6f..f49a984463b 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -1868,14 +1868,6 @@ HexagonTargetLowering::HexagonTargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::CTLZ, MVT::i16, Promote);
   setOperationAction(ISD::CTTZ, MVT::i8,  Promote);
   setOperationAction(ISD::CTTZ, MVT::i16, Promote);
-  setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8,  Expand);
-  setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16, Expand);
-  setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
-  setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
-  setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i8,  Expand);
-  setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16, Expand);
-  setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
-  setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
 
   // In V5, popcount can count # of 1s in i64 but returns i32.
   // On V4 it will be expanded (set later).
@@ -1955,8 +1947,7 @@ HexagonTargetLowering::HexagonTargetLowering(const TargetMachine &TM,
     ISD::SMUL_LOHI,             ISD::UMUL_LOHI,
     // Logical/bit:
     ISD::AND,     ISD::OR,      ISD::XOR,     ISD::ROTL,    ISD::ROTR,
-    ISD::CTPOP,   ISD::CTLZ,    ISD::CTTZ,    ISD::CTLZ_ZERO_UNDEF,
-    ISD::CTTZ_ZERO_UNDEF,
+    ISD::CTPOP,   ISD::CTLZ,    ISD::CTTZ,
     // Floating point arithmetic/math functions:
     ISD::FADD,    ISD::FSUB,    ISD::FMUL,    ISD::FMA,     ISD::FDIV,
     ISD::FREM,    ISD::FNEG,    ISD::FABS,    ISD::FSQRT,   ISD::FSIN,