Remove SETCCE use from Lanai's backend

Summary: This creates a small perf regression, but after talking with Jacques Pienaar, he was good with it to get things moving toward removng SETCCE.

Reviewers: jpienaar, bryant

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D47626

2 files changed, 0 insertions, 17 deletions

diff --git a/llvm/lib/Target/Lanai/LanaiISelLowering.cpp b/llvm/lib/Target/Lanai/LanaiISelLowering.cpp
index 22fcf473d0c..045a897c412 100644
--- a/llvm/lib/Target/Lanai/LanaiISelLowering.cpp
+++ b/llvm/lib/Target/Lanai/LanaiISelLowering.cpp
@@ -87,7 +87,6 @@ LanaiTargetLowering::LanaiTargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::BR_JT, MVT::Other, Expand);
   setOperationAction(ISD::BRCOND, MVT::Other, Expand);
   setOperationAction(ISD::SETCC, MVT::i32, Custom);
-  setOperationAction(ISD::SETCCE, MVT::i32, Custom);
   setOperationAction(ISD::SELECT, MVT::i32, Expand);
   setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
 
@@ -193,8 +192,6 @@ SDValue LanaiTargetLowering::LowerOperation(SDValue Op,
     return LowerSELECT_CC(Op, DAG);
   case ISD::SETCC:
     return LowerSETCC(Op, DAG);
-  case ISD::SETCCE:
-    return LowerSETCCE(Op, DAG);
   case ISD::SHL_PARTS:
     return LowerSHL_PARTS(Op, DAG);
   case ISD::SRL_PARTS:
@@ -969,19 +966,6 @@ SDValue LanaiTargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) const {
   return Res;
 }
 
-SDValue LanaiTargetLowering::LowerSETCCE(SDValue Op, SelectionDAG &DAG) const {
-  SDValue LHS = Op.getOperand(0);
-  SDValue RHS = Op.getOperand(1);
-  SDValue Carry = Op.getOperand(2);
-  SDValue Cond = Op.getOperand(3);
-  SDLoc DL(Op);
-
-  LPCC::CondCode CC = IntCondCCodeToICC(Cond, DL, RHS, DAG);
-  SDValue TargetCC = DAG.getConstant(CC, DL, MVT::i32);
-  SDValue Flag = DAG.getNode(LanaiISD::SUBBF, DL, MVT::Glue, LHS, RHS, Carry);
-  return DAG.getNode(LanaiISD::SETCC, DL, Op.getValueType(), TargetCC, Flag);
-}
-
 SDValue LanaiTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
   SDValue LHS = Op.getOperand(0);
   SDValue RHS = Op.getOperand(1);
diff --git a/llvm/lib/Target/Lanai/LanaiISelLowering.h b/llvm/lib/Target/Lanai/LanaiISelLowering.h
index 46024e6fd50..0cde633cb41 100644
--- a/llvm/lib/Target/Lanai/LanaiISelLowering.h
+++ b/llvm/lib/Target/Lanai/LanaiISelLowering.h
@@ -87,7 +87,6 @@ public:
   SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const;
-  SDValue LowerSETCCE(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerSHL_PARTS(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerSRL_PARTS(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;