diff options
| -rw-r--r-- | llvm/include/llvm/CodeGen/ISDOpcodes.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/include/llvm/CodeGen/ISDOpcodes.h b/llvm/include/llvm/CodeGen/ISDOpcodes.h index 41d5993aac4..666671c4f81 100644 --- a/llvm/include/llvm/CodeGen/ISDOpcodes.h +++ b/llvm/include/llvm/CodeGen/ISDOpcodes.h @@ -486,6 +486,12 @@ namespace ISD { /// the same bit size (e.g. f32 <-> i32). This can also be used for /// int-to-int or fp-to-fp conversions, but that is a noop, deleted by /// getNode(). + /// + /// This operator is subtly different from the bitcast instruction from + /// LLVM-IR since this node may change the bits in the register. For + /// example, this occurs on big-endian NEON and big-endian MSA where the + /// layout of the bits in the register depends on the vector type and this + /// operator acts as a shuffle operation for some vector type combinations. BITCAST, /// ADDRSPACECAST - This operator converts between pointers of different |
