Add definition of DSBH (Double Swap Bytes within Halfwords) and
DSHD (Double Swap Halfwords within Doublewords). Add a pattern which replaces
64-bit bswap with a DSBH and DSHD pair.
llvm-svn: 147017
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index cfdce3a..d0ee632 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -221,8 +221,10 @@
if (!Subtarget->hasBitCount())
setOperationAction(ISD::CTLZ, MVT::i32, Expand);
- if (!Subtarget->hasSwap())
+ if (!Subtarget->hasSwap()) {
setOperationAction(ISD::BSWAP, MVT::i32, Expand);
+ setOperationAction(ISD::BSWAP, MVT::i64, Expand);
+ }
setTargetDAGCombine(ISD::ADDE);
setTargetDAGCombine(ISD::SUBE);