[AArch64] Expand v8i8 cttz (PR39729)

Fix for https://bugs.llvm.org/show_bug.cgi?id=39729.

Rather than adding just a case for v8i8 I'm setting cttz to expand
for all vector types.

Differential Revision: https://reviews.llvm.org/D58008

llvm-svn: 353872

1 files changed, 1 insertions, 9 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index cfca92dd1dc..df39b182d34 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -681,15 +681,6 @@ AArch64TargetLowering::AArch64TargetLowering(const TargetMachine &TM,
     setOperationAction(ISD::CTLZ,       MVT::v1i64, Expand);
     setOperationAction(ISD::CTLZ,       MVT::v2i64, Expand);
 
-    setOperationAction(ISD::CTTZ,       MVT::v2i8,  Expand);
-    setOperationAction(ISD::CTTZ,       MVT::v4i16, Expand);
-    setOperationAction(ISD::CTTZ,       MVT::v2i32, Expand);
-    setOperationAction(ISD::CTTZ,       MVT::v1i64, Expand);
-    setOperationAction(ISD::CTTZ,       MVT::v16i8, Expand);
-    setOperationAction(ISD::CTTZ,       MVT::v8i16, Expand);
-    setOperationAction(ISD::CTTZ,       MVT::v4i32, Expand);
-    setOperationAction(ISD::CTTZ,       MVT::v2i64, Expand);
-
     // AArch64 doesn't have MUL.2d:
     setOperationAction(ISD::MUL, MVT::v2i64, Expand);
     // Custom handling for some quad-vector types to detect MULL.
@@ -728,6 +719,7 @@ AArch64TargetLowering::AArch64TargetLowering(const TargetMachine &TM,
       setOperationAction(ISD::UMUL_LOHI, VT, Expand);
 
       setOperationAction(ISD::BSWAP, VT, Expand);
+      setOperationAction(ISD::CTTZ, VT, Expand);
 
       for (MVT InnerVT : MVT::vector_valuetypes()) {
         setTruncStoreAction(VT, InnerVT, Expand);