[llvm] r325986 - bpf: Support i32 in getScalarShiftAmountTy method

[Yonghong Song via llvm-commits]

Author: yhs
Date: Fri Feb 23 15:49:26 2018
New Revision: 325986

URL: http://llvm.org/viewvc/llvm-project?rev=325986&view=rev
Log:
bpf: Support i32 in getScalarShiftAmountTy method

getScalarShiftAmount method should be implemented for eBPF backend to make
sure shift amount could still get correct type once 32-bit subregisters
support are enabled.

Signed-off-by: Jiong Wang <jiong.wang at netronome.com>
Reviewed-by: Yonghong Song <yhs at fb.com>

Modified:
    llvm/trunk/lib/Target/BPF/BPFISelLowering.cpp
    llvm/trunk/lib/Target/BPF/BPFISelLowering.h

Modified: llvm/trunk/lib/Target/BPF/BPFISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/BPF/BPFISelLowering.cpp?rev=325986&r1=325985&r2=325986&view=diff
==============================================================================
--- llvm/trunk/lib/Target/BPF/BPFISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/BPF/BPFISelLowering.cpp Fri Feb 23 15:49:26 2018
@@ -713,3 +713,8 @@ EVT BPFTargetLowering::getSetCCResultTyp
                                           EVT VT) const {
   return getHasAlu32() ? MVT::i32 : MVT::i64;
 }
+
+MVT BPFTargetLowering::getScalarShiftAmountTy(const DataLayout &DL,
+                                              EVT VT) const {
+  return (getHasAlu32() && VT == MVT::i32) ? MVT::i32 : MVT::i64;
+}

Modified: llvm/trunk/lib/Target/BPF/BPFISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/BPF/BPFISelLowering.h?rev=325986&r1=325985&r2=325986&view=diff
==============================================================================
--- llvm/trunk/lib/Target/BPF/BPFISelLowering.h (original)
+++ llvm/trunk/lib/Target/BPF/BPFISelLowering.h Fri Feb 23 15:49:26 2018
@@ -60,6 +60,8 @@ public:
   EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
                          EVT VT) const override;
 
+  MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override;
+
 private:
   // Control Instruction Selection Features
   bool HasAlu32;