Set ADDE/ADDC/SUBE/SUBC to expand by default

Summary:
They've been deprecated in favor of UADDO/ADDCARRY or USUBO/SUBCARRY for a while.

Target that uses these opcodes are changed in order to ensure their behavior doesn't change.

Reviewers: efriedma, craig.topper, dblaikie, bkramer

Subscribers: jholewinski, arsenm, jyknight, sdardis, nemanjai, nhaehnle, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, jordy.potman.lists, apazos, sabuasal, niosHD, jrtc27, zzheng, edward-jones, mgrang, atanasyan, llvm-commits

Differential Revision: https://reviews.llvm.org/D47422

llvm-svn: 333748

1 files changed, 0 insertions, 5 deletions

diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index f5726143464..9f0069878d8 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -80,11 +80,6 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
   for (auto VT : {MVT::i1, MVT::i8, MVT::i16})
     setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
 
-  setOperationAction(ISD::ADDC, XLenVT, Expand);
-  setOperationAction(ISD::ADDE, XLenVT, Expand);
-  setOperationAction(ISD::SUBC, XLenVT, Expand);
-  setOperationAction(ISD::SUBE, XLenVT, Expand);
-
   if (!Subtarget.hasStdExtM()) {
     setOperationAction(ISD::MUL, XLenVT, Expand);
     setOperationAction(ISD::MULHS, XLenVT, Expand);