Index: llvm/lib/Target/RISCV/RISCVISelLowering.cpp
===================================================================
--- llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -763,9 +763,9 @@
   // We can use any register for comparisons
   setHasMultipleConditionRegisters();
 
-  if (Subtarget.hasStdExtZbp()) {
-    setTargetDAGCombine(ISD::OR);
-  }
+  setTargetDAGCombine(ISD::AND);
+  setTargetDAGCombine(ISD::OR);
+  setTargetDAGCombine(ISD::XOR);
   if (Subtarget.hasStdExtV()) {
     setTargetDAGCombine(ISD::FCOPYSIGN);
     setTargetDAGCombine(ISD::MGATHER);
@@ -5176,6 +5176,100 @@
       DAG.getConstant(CombinedShAmt, DL, N->getOperand(1).getValueType()));
 }
 
+// Combine a constant select operand into its use:
+//
+// (and (select_cc lhs, rhs, cc, -1, c), x)
+//   -> (select_cc lhs, rhs, cc, x, (and, x, c))  [AllOnes=1]
+// (or  (select_cc lhs, rhs, cc, 0, c), x)
+//   -> (select_cc lhs, rhs, cc, x, (or, x, c))
+// (xor (select_cc lhs, rhs, cc, 0, c), x)
+//   -> (select_cc lhs, rhs, cc, x, (xor, x, c))
+static
+SDValue combineSelectCCAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
+                              SelectionDAG &DAG, bool AllOnes) {
+  EVT VT = N->getValueType(0);
+
+  if (Slct.getOpcode() != RISCVISD::SELECT_CC || !Slct.hasOneUse())
+    return SDValue();
+
+  auto isZeroOrAllOnes = [](SDValue N, bool AllOnes) {
+    return AllOnes ? isAllOnesConstant(N) : isNullConstant(N);
+  };
+
+  bool SwapSelectOps;
+  SDValue TrueVal = Slct.getOperand(3);
+  SDValue FalseVal = Slct.getOperand(4);
+  SDValue NonConstantVal;
+  if (isZeroOrAllOnes(TrueVal, AllOnes)) {
+    SwapSelectOps = false;
+    NonConstantVal = FalseVal;
+  } else if (isZeroOrAllOnes(FalseVal, AllOnes)) {
+    SwapSelectOps = true;
+    NonConstantVal = TrueVal;
+  } else
+    return SDValue();
+
+  // Slct is now know to be the desired identity constant when CC is true.
+  TrueVal = OtherOp;
+  FalseVal = DAG.getNode(N->getOpcode(), SDLoc(N), VT,
+                         OtherOp, NonConstantVal);
+  // Unless SwapSelectOps says CC should be false.
+  if (SwapSelectOps)
+    std::swap(TrueVal, FalseVal);
+
+  return DAG.getNode(RISCVISD::SELECT_CC, SDLoc(N), VT,
+                     {Slct.getOperand(0), Slct.getOperand(1),
+                     Slct.getOperand(2), TrueVal, FalseVal});
+}
+
+// Attempt combineSelectAndUse on each operand of a commutative operator N.
+static
+SDValue combineSelectCCAndUseCommutative(SDNode *N, SelectionDAG &DAG,
+                                         bool AllOnes) {
+  SDValue N0 = N->getOperand(0);
+  SDValue N1 = N->getOperand(1);
+  if (SDValue Result = combineSelectCCAndUse(N, N0, N1, DAG, AllOnes))
+    return Result;
+  if (SDValue Result = combineSelectCCAndUse(N, N1, N0, DAG, AllOnes))
+    return Result;
+  return SDValue();
+}
+
+static SDValue performANDCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
+                                const RISCVSubtarget &Subtarget) {
+  SelectionDAG &DAG = DCI.DAG;
+
+  // fold (and (select_cc lhs, rhs, cc, -1, y), x) ->
+  //      (select lhs, rhs, cc, x, (and x, y))
+  return combineSelectCCAndUseCommutative(N, DAG, true);
+}
+
+static SDValue performORCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
+                                const RISCVSubtarget &Subtarget) {
+  SelectionDAG &DAG = DCI.DAG;
+  if (Subtarget.hasStdExtZbp()) {
+    if (auto GREV = combineORToGREV(SDValue(N, 0), DAG, Subtarget))
+      return GREV;
+    if (auto GORC = combineORToGORC(SDValue(N, 0), DAG, Subtarget))
+      return GORC;
+    if (auto SHFL = combineORToSHFL(SDValue(N, 0), DAG, Subtarget))
+      return SHFL;
+  }
+
+  // fold (or (select_cc lhs, rhs, cc, 0, y), x) ->
+  //      (select lhs, rhs, cc, x, (or x, y))
+  return combineSelectCCAndUseCommutative(N, DAG, false);
+}
+
+static SDValue performXORCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
+                                const RISCVSubtarget &Subtarget) {
+  SelectionDAG &DAG = DCI.DAG;
+
+  // fold (xor (select_cc lhs, rhs, cc, 0, y), x) ->
+  //      (select lhs, rhs, cc, x, (xor x, y))
+  return combineSelectCCAndUseCommutative(N, DAG, false);
+}
+
 SDValue RISCVTargetLowering::PerformDAGCombine(SDNode *N,
                                                DAGCombinerInfo &DCI) const {
   SelectionDAG &DAG = DCI.DAG;
@@ -5394,14 +5488,12 @@
     return DAG.getNode(ISD::AND, DL, MVT::i64, NewFMV,
                        DAG.getConstant(~SignBit, DL, MVT::i64));
   }
+  case ISD::AND:
+    return performANDCombine(N, DCI, Subtarget);
   case ISD::OR:
-    if (auto GREV = combineORToGREV(SDValue(N, 0), DCI.DAG, Subtarget))
-      return GREV;
-    if (auto GORC = combineORToGORC(SDValue(N, 0), DCI.DAG, Subtarget))
-      return GORC;
-    if (auto SHFL = combineORToSHFL(SDValue(N, 0), DCI.DAG, Subtarget))
-      return SHFL;
-    break;
+    return performORCombine(N, DCI, Subtarget);
+  case ISD::XOR:
+    return performXORCombine(N, DCI, Subtarget);
   case RISCVISD::SELECT_CC: {
     // Transform
     SDValue LHS = N->getOperand(0);
Index: llvm/test/CodeGen/RISCV/rv32zbb-zbp.ll
===================================================================
--- llvm/test/CodeGen/RISCV/rv32zbb-zbp.ll
+++ llvm/test/CodeGen/RISCV/rv32zbb-zbp.ll
@@ -218,48 +218,43 @@
 define i64 @rol_i64(i64 %a, i64 %b) nounwind {
 ; RV32I-LABEL: rol_i64:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    andi a3, a2, 63
-; RV32I-NEXT:    addi t1, a3, -32
+; RV32I-NEXT:    mv a7, a1
+; RV32I-NEXT:    andi a1, a2, 63
+; RV32I-NEXT:    addi t0, a1, -32
 ; RV32I-NEXT:    addi a6, zero, 31
-; RV32I-NEXT:    bltz t1, .LBB7_2
+; RV32I-NEXT:    bltz t0, .LBB7_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    sll a7, a0, t1
+; RV32I-NEXT:    sll a1, a0, t0
 ; RV32I-NEXT:    j .LBB7_3
 ; RV32I-NEXT:  .LBB7_2:
-; RV32I-NEXT:    sll a4, a1, a2
-; RV32I-NEXT:    sub a3, a6, a3
-; RV32I-NEXT:    srli a5, a0, 1
-; RV32I-NEXT:    srl a3, a5, a3
-; RV32I-NEXT:    or a7, a4, a3
+; RV32I-NEXT:    sll a3, a7, a2
+; RV32I-NEXT:    sub a1, a6, a1
+; RV32I-NEXT:    srli a4, a0, 1
+; RV32I-NEXT:    srl a1, a4, a1
+; RV32I-NEXT:    or a1, a3, a1
 ; RV32I-NEXT:  .LBB7_3:
-; RV32I-NEXT:    neg a4, a2
-; RV32I-NEXT:    andi a5, a4, 63
-; RV32I-NEXT:    addi a3, a5, -32
-; RV32I-NEXT:    bltz a3, .LBB7_7
+; RV32I-NEXT:    neg a5, a2
+; RV32I-NEXT:    andi a3, a5, 63
+; RV32I-NEXT:    addi a4, a3, -32
+; RV32I-NEXT:    bltz a4, .LBB7_5
 ; RV32I-NEXT:  # %bb.4:
-; RV32I-NEXT:    mv t0, zero
-; RV32I-NEXT:    bgez a3, .LBB7_8
+; RV32I-NEXT:    srl a3, a7, a4
+; RV32I-NEXT:    bltz t0, .LBB7_6
+; RV32I-NEXT:    j .LBB7_7
 ; RV32I-NEXT:  .LBB7_5:
-; RV32I-NEXT:    srl a3, a0, a4
-; RV32I-NEXT:    sub a4, a6, a5
-; RV32I-NEXT:    slli a1, a1, 1
-; RV32I-NEXT:    sll a1, a1, a4
-; RV32I-NEXT:    or a4, a3, a1
-; RV32I-NEXT:    or a1, a7, t0
-; RV32I-NEXT:    bgez t1, .LBB7_9
+; RV32I-NEXT:    srl a4, a7, a5
+; RV32I-NEXT:    or a1, a1, a4
+; RV32I-NEXT:    srl a4, a0, a5
+; RV32I-NEXT:    sub a3, a6, a3
+; RV32I-NEXT:    slli a5, a7, 1
+; RV32I-NEXT:    sll a3, a5, a3
+; RV32I-NEXT:    or a3, a4, a3
+; RV32I-NEXT:    bgez t0, .LBB7_7
 ; RV32I-NEXT:  .LBB7_6:
 ; RV32I-NEXT:    sll a0, a0, a2
-; RV32I-NEXT:    or a0, a0, a4
-; RV32I-NEXT:    ret
+; RV32I-NEXT:    or a3, a3, a0
 ; RV32I-NEXT:  .LBB7_7:
-; RV32I-NEXT:    srl t0, a1, a4
-; RV32I-NEXT:    bltz a3, .LBB7_5
-; RV32I-NEXT:  .LBB7_8:
-; RV32I-NEXT:    srl a4, a1, a3
-; RV32I-NEXT:    or a1, a7, t0
-; RV32I-NEXT:    bltz t1, .LBB7_6
-; RV32I-NEXT:  .LBB7_9:
-; RV32I-NEXT:    or a0, zero, a4
+; RV32I-NEXT:    mv a0, a3
 ; RV32I-NEXT:    ret
 ;
 ; RV32IB-LABEL: rol_i64:
@@ -299,94 +294,84 @@
 ;
 ; RV32IBB-LABEL: rol_i64:
 ; RV32IBB:       # %bb.0:
-; RV32IBB-NEXT:    andi a3, a2, 63
-; RV32IBB-NEXT:    addi t1, a3, -32
+; RV32IBB-NEXT:    mv a7, a1
+; RV32IBB-NEXT:    andi a1, a2, 63
+; RV32IBB-NEXT:    addi t0, a1, -32
 ; RV32IBB-NEXT:    addi a6, zero, 31
-; RV32IBB-NEXT:    bltz t1, .LBB7_2
+; RV32IBB-NEXT:    bltz t0, .LBB7_2
 ; RV32IBB-NEXT:  # %bb.1:
-; RV32IBB-NEXT:    sll a7, a0, t1
+; RV32IBB-NEXT:    sll a1, a0, t0
 ; RV32IBB-NEXT:    j .LBB7_3
 ; RV32IBB-NEXT:  .LBB7_2:
-; RV32IBB-NEXT:    sll a4, a1, a2
-; RV32IBB-NEXT:    sub a3, a6, a3
-; RV32IBB-NEXT:    srli a5, a0, 1
-; RV32IBB-NEXT:    srl a3, a5, a3
-; RV32IBB-NEXT:    or a7, a4, a3
+; RV32IBB-NEXT:    sll a3, a7, a2
+; RV32IBB-NEXT:    sub a1, a6, a1
+; RV32IBB-NEXT:    srli a4, a0, 1
+; RV32IBB-NEXT:    srl a1, a4, a1
+; RV32IBB-NEXT:    or a1, a3, a1
 ; RV32IBB-NEXT:  .LBB7_3:
-; RV32IBB-NEXT:    neg a4, a2
-; RV32IBB-NEXT:    andi a5, a4, 63
-; RV32IBB-NEXT:    addi a3, a5, -32
-; RV32IBB-NEXT:    bltz a3, .LBB7_7
+; RV32IBB-NEXT:    neg a5, a2
+; RV32IBB-NEXT:    andi a3, a5, 63
+; RV32IBB-NEXT:    addi a4, a3, -32
+; RV32IBB-NEXT:    bltz a4, .LBB7_5
 ; RV32IBB-NEXT:  # %bb.4:
-; RV32IBB-NEXT:    mv t0, zero
-; RV32IBB-NEXT:    bgez a3, .LBB7_8
+; RV32IBB-NEXT:    srl a3, a7, a4
+; RV32IBB-NEXT:    bltz t0, .LBB7_6
+; RV32IBB-NEXT:    j .LBB7_7
 ; RV32IBB-NEXT:  .LBB7_5:
-; RV32IBB-NEXT:    srl a3, a0, a4
-; RV32IBB-NEXT:    sub a4, a6, a5
-; RV32IBB-NEXT:    slli a1, a1, 1
-; RV32IBB-NEXT:    sll a1, a1, a4
-; RV32IBB-NEXT:    or a4, a3, a1
-; RV32IBB-NEXT:    or a1, a7, t0
-; RV32IBB-NEXT:    bgez t1, .LBB7_9
+; RV32IBB-NEXT:    srl a4, a7, a5
+; RV32IBB-NEXT:    or a1, a1, a4
+; RV32IBB-NEXT:    srl a4, a0, a5
+; RV32IBB-NEXT:    sub a3, a6, a3
+; RV32IBB-NEXT:    slli a5, a7, 1
+; RV32IBB-NEXT:    sll a3, a5, a3
+; RV32IBB-NEXT:    or a3, a4, a3
+; RV32IBB-NEXT:    bgez t0, .LBB7_7
 ; RV32IBB-NEXT:  .LBB7_6:
 ; RV32IBB-NEXT:    sll a0, a0, a2
-; RV32IBB-NEXT:    or a0, a0, a4
-; RV32IBB-NEXT:    ret
+; RV32IBB-NEXT:    or a3, a3, a0
 ; RV32IBB-NEXT:  .LBB7_7:
-; RV32IBB-NEXT:    srl t0, a1, a4
-; RV32IBB-NEXT:    bltz a3, .LBB7_5
-; RV32IBB-NEXT:  .LBB7_8:
-; RV32IBB-NEXT:    srl a4, a1, a3
-; RV32IBB-NEXT:    or a1, a7, t0
-; RV32IBB-NEXT:    bltz t1, .LBB7_6
-; RV32IBB-NEXT:  .LBB7_9:
-; RV32IBB-NEXT:    or a0, zero, a4
+; RV32IBB-NEXT:    mv a0, a3
 ; RV32IBB-NEXT:    ret
 ;
 ; RV32IBP-LABEL: rol_i64:
 ; RV32IBP:       # %bb.0:
-; RV32IBP-NEXT:    andi a3, a2, 63
-; RV32IBP-NEXT:    addi t1, a3, -32
+; RV32IBP-NEXT:    mv a7, a1
+; RV32IBP-NEXT:    andi a1, a2, 63
+; RV32IBP-NEXT:    addi t0, a1, -32
 ; RV32IBP-NEXT:    addi a6, zero, 31
-; RV32IBP-NEXT:    bltz t1, .LBB7_2
+; RV32IBP-NEXT:    bltz t0, .LBB7_2
 ; RV32IBP-NEXT:  # %bb.1:
-; RV32IBP-NEXT:    sll a7, a0, t1
+; RV32IBP-NEXT:    sll a1, a0, t0
 ; RV32IBP-NEXT:    j .LBB7_3
 ; RV32IBP-NEXT:  .LBB7_2:
-; RV32IBP-NEXT:    sll a4, a1, a2
-; RV32IBP-NEXT:    sub a3, a6, a3
-; RV32IBP-NEXT:    srli a5, a0, 1
-; RV32IBP-NEXT:    srl a3, a5, a3
-; RV32IBP-NEXT:    or a7, a4, a3
+; RV32IBP-NEXT:    sll a3, a7, a2
+; RV32IBP-NEXT:    sub a1, a6, a1
+; RV32IBP-NEXT:    srli a4, a0, 1
+; RV32IBP-NEXT:    srl a1, a4, a1
+; RV32IBP-NEXT:    or a1, a3, a1
 ; RV32IBP-NEXT:  .LBB7_3:
-; RV32IBP-NEXT:    neg a4, a2
-; RV32IBP-NEXT:    andi a5, a4, 63
-; RV32IBP-NEXT:    addi a3, a5, -32
-; RV32IBP-NEXT:    bltz a3, .LBB7_7
+; RV32IBP-NEXT:    neg a5, a2
+; RV32IBP-NEXT:    andi a3, a5, 63
+; RV32IBP-NEXT:    addi a4, a3, -32
+; RV32IBP-NEXT:    bltz a4, .LBB7_5
 ; RV32IBP-NEXT:  # %bb.4:
-; RV32IBP-NEXT:    mv t0, zero
-; RV32IBP-NEXT:    bgez a3, .LBB7_8
+; RV32IBP-NEXT:    srl a3, a7, a4
+; RV32IBP-NEXT:    bltz t0, .LBB7_6
+; RV32IBP-NEXT:    j .LBB7_7
 ; RV32IBP-NEXT:  .LBB7_5:
-; RV32IBP-NEXT:    srl a3, a0, a4
-; RV32IBP-NEXT:    sub a4, a6, a5
-; RV32IBP-NEXT:    slli a1, a1, 1
-; RV32IBP-NEXT:    sll a1, a1, a4
-; RV32IBP-NEXT:    or a4, a3, a1
-; RV32IBP-NEXT:    or a1, a7, t0
-; RV32IBP-NEXT:    bgez t1, .LBB7_9
+; RV32IBP-NEXT:    srl a4, a7, a5
+; RV32IBP-NEXT:    or a1, a1, a4
+; RV32IBP-NEXT:    srl a4, a0, a5
+; RV32IBP-NEXT:    sub a3, a6, a3
+; RV32IBP-NEXT:    slli a5, a7, 1
+; RV32IBP-NEXT:    sll a3, a5, a3
+; RV32IBP-NEXT:    or a3, a4, a3
+; RV32IBP-NEXT:    bgez t0, .LBB7_7
 ; RV32IBP-NEXT:  .LBB7_6:
 ; RV32IBP-NEXT:    sll a0, a0, a2
-; RV32IBP-NEXT:    or a0, a0, a4
-; RV32IBP-NEXT:    ret
+; RV32IBP-NEXT:    or a3, a3, a0
 ; RV32IBP-NEXT:  .LBB7_7:
-; RV32IBP-NEXT:    srl t0, a1, a4
-; RV32IBP-NEXT:    bltz a3, .LBB7_5
-; RV32IBP-NEXT:  .LBB7_8:
-; RV32IBP-NEXT:    srl a4, a1, a3
-; RV32IBP-NEXT:    or a1, a7, t0
-; RV32IBP-NEXT:    bltz t1, .LBB7_6
-; RV32IBP-NEXT:  .LBB7_9:
-; RV32IBP-NEXT:    or a0, zero, a4
+; RV32IBP-NEXT:    mv a0, a3
 ; RV32IBP-NEXT:    ret
   %or = tail call i64 @llvm.fshl.i64(i64 %a, i64 %a, i64 %b)
   ret i64 %or
@@ -431,48 +416,43 @@
 define i64 @ror_i64(i64 %a, i64 %b) nounwind {
 ; RV32I-LABEL: ror_i64:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    andi a3, a2, 63
-; RV32I-NEXT:    addi t1, a3, -32
+; RV32I-NEXT:    mv t0, a0
+; RV32I-NEXT:    andi a0, a2, 63
+; RV32I-NEXT:    addi a7, a0, -32
 ; RV32I-NEXT:    addi a6, zero, 31
-; RV32I-NEXT:    bltz t1, .LBB9_2
+; RV32I-NEXT:    bltz a7, .LBB9_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    srl a7, a1, t1
+; RV32I-NEXT:    srl a0, a1, a7
 ; RV32I-NEXT:    j .LBB9_3
 ; RV32I-NEXT:  .LBB9_2:
-; RV32I-NEXT:    srl a4, a0, a2
-; RV32I-NEXT:    sub a3, a6, a3
-; RV32I-NEXT:    slli a5, a1, 1
-; RV32I-NEXT:    sll a3, a5, a3
-; RV32I-NEXT:    or a7, a4, a3
+; RV32I-NEXT:    srl a3, t0, a2
+; RV32I-NEXT:    sub a0, a6, a0
+; RV32I-NEXT:    slli a4, a1, 1
+; RV32I-NEXT:    sll a0, a4, a0
+; RV32I-NEXT:    or a0, a3, a0
 ; RV32I-NEXT:  .LBB9_3:
-; RV32I-NEXT:    neg a4, a2
-; RV32I-NEXT:    andi a5, a4, 63
-; RV32I-NEXT:    addi a3, a5, -32
-; RV32I-NEXT:    bltz a3, .LBB9_7
+; RV32I-NEXT:    neg a5, a2
+; RV32I-NEXT:    andi a4, a5, 63
+; RV32I-NEXT:    addi a3, a4, -32
+; RV32I-NEXT:    bltz a3, .LBB9_5
 ; RV32I-NEXT:  # %bb.4:
-; RV32I-NEXT:    mv t0, zero
-; RV32I-NEXT:    bgez a3, .LBB9_8
+; RV32I-NEXT:    sll a3, t0, a3
+; RV32I-NEXT:    bltz a7, .LBB9_6
+; RV32I-NEXT:    j .LBB9_7
 ; RV32I-NEXT:  .LBB9_5:
-; RV32I-NEXT:    sll a3, a1, a4
-; RV32I-NEXT:    sub a4, a6, a5
-; RV32I-NEXT:    srli a0, a0, 1
-; RV32I-NEXT:    srl a0, a0, a4
-; RV32I-NEXT:    or a4, a3, a0
-; RV32I-NEXT:    or a0, a7, t0
-; RV32I-NEXT:    bgez t1, .LBB9_9
+; RV32I-NEXT:    sll a3, t0, a5
+; RV32I-NEXT:    or a0, a0, a3
+; RV32I-NEXT:    sll a3, a1, a5
+; RV32I-NEXT:    sub a4, a6, a4
+; RV32I-NEXT:    srli a5, t0, 1
+; RV32I-NEXT:    srl a4, a5, a4
+; RV32I-NEXT:    or a3, a3, a4
+; RV32I-NEXT:    bgez a7, .LBB9_7
 ; RV32I-NEXT:  .LBB9_6:
 ; RV32I-NEXT:    srl a1, a1, a2
-; RV32I-NEXT:    or a1, a1, a4
-; RV32I-NEXT:    ret
+; RV32I-NEXT:    or a3, a3, a1
 ; RV32I-NEXT:  .LBB9_7:
-; RV32I-NEXT:    sll t0, a0, a4
-; RV32I-NEXT:    bltz a3, .LBB9_5
-; RV32I-NEXT:  .LBB9_8:
-; RV32I-NEXT:    sll a4, a0, a3
-; RV32I-NEXT:    or a0, a7, t0
-; RV32I-NEXT:    bltz t1, .LBB9_6
-; RV32I-NEXT:  .LBB9_9:
-; RV32I-NEXT:    or a1, zero, a4
+; RV32I-NEXT:    mv a1, a3
 ; RV32I-NEXT:    ret
 ;
 ; RV32IB-LABEL: ror_i64:
@@ -512,94 +492,84 @@
 ;
 ; RV32IBB-LABEL: ror_i64:
 ; RV32IBB:       # %bb.0:
-; RV32IBB-NEXT:    andi a3, a2, 63
-; RV32IBB-NEXT:    addi t1, a3, -32
+; RV32IBB-NEXT:    mv t0, a0
+; RV32IBB-NEXT:    andi a0, a2, 63
+; RV32IBB-NEXT:    addi a7, a0, -32
 ; RV32IBB-NEXT:    addi a6, zero, 31
-; RV32IBB-NEXT:    bltz t1, .LBB9_2
+; RV32IBB-NEXT:    bltz a7, .LBB9_2
 ; RV32IBB-NEXT:  # %bb.1:
-; RV32IBB-NEXT:    srl a7, a1, t1
+; RV32IBB-NEXT:    srl a0, a1, a7
 ; RV32IBB-NEXT:    j .LBB9_3
 ; RV32IBB-NEXT:  .LBB9_2:
-; RV32IBB-NEXT:    srl a4, a0, a2
-; RV32IBB-NEXT:    sub a3, a6, a3
-; RV32IBB-NEXT:    slli a5, a1, 1
-; RV32IBB-NEXT:    sll a3, a5, a3
-; RV32IBB-NEXT:    or a7, a4, a3
+; RV32IBB-NEXT:    srl a3, t0, a2
+; RV32IBB-NEXT:    sub a0, a6, a0
+; RV32IBB-NEXT:    slli a4, a1, 1
+; RV32IBB-NEXT:    sll a0, a4, a0
+; RV32IBB-NEXT:    or a0, a3, a0
 ; RV32IBB-NEXT:  .LBB9_3:
-; RV32IBB-NEXT:    neg a4, a2
-; RV32IBB-NEXT:    andi a5, a4, 63
-; RV32IBB-NEXT:    addi a3, a5, -32
-; RV32IBB-NEXT:    bltz a3, .LBB9_7
+; RV32IBB-NEXT:    neg a5, a2
+; RV32IBB-NEXT:    andi a4, a5, 63
+; RV32IBB-NEXT:    addi a3, a4, -32
+; RV32IBB-NEXT:    bltz a3, .LBB9_5
 ; RV32IBB-NEXT:  # %bb.4:
-; RV32IBB-NEXT:    mv t0, zero
-; RV32IBB-NEXT:    bgez a3, .LBB9_8
+; RV32IBB-NEXT:    sll a3, t0, a3
+; RV32IBB-NEXT:    bltz a7, .LBB9_6
+; RV32IBB-NEXT:    j .LBB9_7
 ; RV32IBB-NEXT:  .LBB9_5:
-; RV32IBB-NEXT:    sll a3, a1, a4
-; RV32IBB-NEXT:    sub a4, a6, a5
-; RV32IBB-NEXT:    srli a0, a0, 1
-; RV32IBB-NEXT:    srl a0, a0, a4
-; RV32IBB-NEXT:    or a4, a3, a0
-; RV32IBB-NEXT:    or a0, a7, t0
-; RV32IBB-NEXT:    bgez t1, .LBB9_9
+; RV32IBB-NEXT:    sll a3, t0, a5
+; RV32IBB-NEXT:    or a0, a0, a3
+; RV32IBB-NEXT:    sll a3, a1, a5
+; RV32IBB-NEXT:    sub a4, a6, a4
+; RV32IBB-NEXT:    srli a5, t0, 1
+; RV32IBB-NEXT:    srl a4, a5, a4
+; RV32IBB-NEXT:    or a3, a3, a4
+; RV32IBB-NEXT:    bgez a7, .LBB9_7
 ; RV32IBB-NEXT:  .LBB9_6:
 ; RV32IBB-NEXT:    srl a1, a1, a2
-; RV32IBB-NEXT:    or a1, a1, a4
-; RV32IBB-NEXT:    ret
+; RV32IBB-NEXT:    or a3, a3, a1
 ; RV32IBB-NEXT:  .LBB9_7:
-; RV32IBB-NEXT:    sll t0, a0, a4
-; RV32IBB-NEXT:    bltz a3, .LBB9_5
-; RV32IBB-NEXT:  .LBB9_8:
-; RV32IBB-NEXT:    sll a4, a0, a3
-; RV32IBB-NEXT:    or a0, a7, t0
-; RV32IBB-NEXT:    bltz t1, .LBB9_6
-; RV32IBB-NEXT:  .LBB9_9:
-; RV32IBB-NEXT:    or a1, zero, a4
+; RV32IBB-NEXT:    mv a1, a3
 ; RV32IBB-NEXT:    ret
 ;
 ; RV32IBP-LABEL: ror_i64:
 ; RV32IBP:       # %bb.0:
-; RV32IBP-NEXT:    andi a3, a2, 63
-; RV32IBP-NEXT:    addi t1, a3, -32
+; RV32IBP-NEXT:    mv t0, a0
+; RV32IBP-NEXT:    andi a0, a2, 63
+; RV32IBP-NEXT:    addi a7, a0, -32
 ; RV32IBP-NEXT:    addi a6, zero, 31
-; RV32IBP-NEXT:    bltz t1, .LBB9_2
+; RV32IBP-NEXT:    bltz a7, .LBB9_2
 ; RV32IBP-NEXT:  # %bb.1:
-; RV32IBP-NEXT:    srl a7, a1, t1
+; RV32IBP-NEXT:    srl a0, a1, a7
 ; RV32IBP-NEXT:    j .LBB9_3
 ; RV32IBP-NEXT:  .LBB9_2:
-; RV32IBP-NEXT:    srl a4, a0, a2
-; RV32IBP-NEXT:    sub a3, a6, a3
-; RV32IBP-NEXT:    slli a5, a1, 1
-; RV32IBP-NEXT:    sll a3, a5, a3
-; RV32IBP-NEXT:    or a7, a4, a3
+; RV32IBP-NEXT:    srl a3, t0, a2
+; RV32IBP-NEXT:    sub a0, a6, a0
+; RV32IBP-NEXT:    slli a4, a1, 1
+; RV32IBP-NEXT:    sll a0, a4, a0
+; RV32IBP-NEXT:    or a0, a3, a0
 ; RV32IBP-NEXT:  .LBB9_3:
-; RV32IBP-NEXT:    neg a4, a2
-; RV32IBP-NEXT:    andi a5, a4, 63
-; RV32IBP-NEXT:    addi a3, a5, -32
-; RV32IBP-NEXT:    bltz a3, .LBB9_7
+; RV32IBP-NEXT:    neg a5, a2
+; RV32IBP-NEXT:    andi a4, a5, 63
+; RV32IBP-NEXT:    addi a3, a4, -32
+; RV32IBP-NEXT:    bltz a3, .LBB9_5
 ; RV32IBP-NEXT:  # %bb.4:
-; RV32IBP-NEXT:    mv t0, zero
-; RV32IBP-NEXT:    bgez a3, .LBB9_8
+; RV32IBP-NEXT:    sll a3, t0, a3
+; RV32IBP-NEXT:    bltz a7, .LBB9_6
+; RV32IBP-NEXT:    j .LBB9_7
 ; RV32IBP-NEXT:  .LBB9_5:
-; RV32IBP-NEXT:    sll a3, a1, a4
-; RV32IBP-NEXT:    sub a4, a6, a5
-; RV32IBP-NEXT:    srli a0, a0, 1
-; RV32IBP-NEXT:    srl a0, a0, a4
-; RV32IBP-NEXT:    or a4, a3, a0
-; RV32IBP-NEXT:    or a0, a7, t0
-; RV32IBP-NEXT:    bgez t1, .LBB9_9
+; RV32IBP-NEXT:    sll a3, t0, a5
+; RV32IBP-NEXT:    or a0, a0, a3
+; RV32IBP-NEXT:    sll a3, a1, a5
+; RV32IBP-NEXT:    sub a4, a6, a4
+; RV32IBP-NEXT:    srli a5, t0, 1
+; RV32IBP-NEXT:    srl a4, a5, a4
+; RV32IBP-NEXT:    or a3, a3, a4
+; RV32IBP-NEXT:    bgez a7, .LBB9_7
 ; RV32IBP-NEXT:  .LBB9_6:
 ; RV32IBP-NEXT:    srl a1, a1, a2
-; RV32IBP-NEXT:    or a1, a1, a4
-; RV32IBP-NEXT:    ret
+; RV32IBP-NEXT:    or a3, a3, a1
 ; RV32IBP-NEXT:  .LBB9_7:
-; RV32IBP-NEXT:    sll t0, a0, a4
-; RV32IBP-NEXT:    bltz a3, .LBB9_5
-; RV32IBP-NEXT:  .LBB9_8:
-; RV32IBP-NEXT:    sll a4, a0, a3
-; RV32IBP-NEXT:    or a0, a7, t0
-; RV32IBP-NEXT:    bltz t1, .LBB9_6
-; RV32IBP-NEXT:  .LBB9_9:
-; RV32IBP-NEXT:    or a1, zero, a4
+; RV32IBP-NEXT:    mv a1, a3
 ; RV32IBP-NEXT:    ret
   %or = tail call i64 @llvm.fshr.i64(i64 %a, i64 %a, i64 %b)
   ret i64 %or
Index: llvm/test/CodeGen/RISCV/rv32zbs.ll
===================================================================
--- llvm/test/CodeGen/RISCV/rv32zbs.ll
+++ llvm/test/CodeGen/RISCV/rv32zbs.ll
@@ -63,17 +63,14 @@
 ; RV32I-NEXT:    addi a3, zero, 1
 ; RV32I-NEXT:    bltz a4, .LBB2_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    mv a2, zero
-; RV32I-NEXT:    sll a4, a3, a4
-; RV32I-NEXT:    j .LBB2_3
+; RV32I-NEXT:    sll a2, a3, a4
+; RV32I-NEXT:    not a2, a2
+; RV32I-NEXT:    and a1, a1, a2
+; RV32I-NEXT:    ret
 ; RV32I-NEXT:  .LBB2_2:
-; RV32I-NEXT:    mv a4, zero
 ; RV32I-NEXT:    sll a2, a3, a2
-; RV32I-NEXT:  .LBB2_3:
-; RV32I-NEXT:    not a3, a4
 ; RV32I-NEXT:    not a2, a2
-; RV32I-NEXT:    and a0, a2, a0
-; RV32I-NEXT:    and a1, a3, a1
+; RV32I-NEXT:    and a0, a0, a2
 ; RV32I-NEXT:    ret
 ;
 ; RV32IB-LABEL: sbclr_i64:
@@ -96,17 +93,10 @@
 ; RV32IBS-NEXT:    addi a3, a3, -32
 ; RV32IBS-NEXT:    bltz a3, .LBB2_2
 ; RV32IBS-NEXT:  # %bb.1:
-; RV32IBS-NEXT:    mv a2, zero
-; RV32IBS-NEXT:    bset a3, zero, a3
-; RV32IBS-NEXT:    j .LBB2_3
+; RV32IBS-NEXT:    bclr a1, a1, a3
+; RV32IBS-NEXT:    ret
 ; RV32IBS-NEXT:  .LBB2_2:
-; RV32IBS-NEXT:    mv a3, zero
-; RV32IBS-NEXT:    bset a2, zero, a2
-; RV32IBS-NEXT:  .LBB2_3:
-; RV32IBS-NEXT:    not a3, a3
-; RV32IBS-NEXT:    not a2, a2
-; RV32IBS-NEXT:    and a0, a2, a0
-; RV32IBS-NEXT:    and a1, a3, a1
+; RV32IBS-NEXT:    bclr a0, a0, a2
 ; RV32IBS-NEXT:    ret
   %and = and i64 %b, 63
   %shl = shl nuw i64 1, %and
Index: llvm/test/CodeGen/RISCV/rv32zbt.ll
===================================================================
--- llvm/test/CodeGen/RISCV/rv32zbt.ll
+++ llvm/test/CodeGen/RISCV/rv32zbt.ll
@@ -444,51 +444,45 @@
 ; RV32I-LABEL: fshl_i64:
 ; RV32I:       # %bb.0:
 ; RV32I-NEXT:    andi a5, a4, 63
-; RV32I-NEXT:    addi t1, a5, -32
+; RV32I-NEXT:    addi a7, a5, -32
 ; RV32I-NEXT:    addi a6, zero, 31
-; RV32I-NEXT:    bltz t1, .LBB13_2
+; RV32I-NEXT:    bltz a7, .LBB13_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    sll a7, a0, t1
+; RV32I-NEXT:    sll a1, a0, a7
 ; RV32I-NEXT:    j .LBB13_3
 ; RV32I-NEXT:  .LBB13_2:
-; RV32I-NEXT:    sll a7, a1, a4
+; RV32I-NEXT:    sll t0, a1, a4
 ; RV32I-NEXT:    sub a5, a6, a5
 ; RV32I-NEXT:    srli a1, a0, 1
 ; RV32I-NEXT:    srl a1, a1, a5
-; RV32I-NEXT:    or a7, a7, a1
+; RV32I-NEXT:    or a1, t0, a1
 ; RV32I-NEXT:  .LBB13_3:
-; RV32I-NEXT:    not a1, a4
-; RV32I-NEXT:    andi t3, a1, 63
-; RV32I-NEXT:    addi a5, t3, -32
-; RV32I-NEXT:    srli t2, a3, 1
-; RV32I-NEXT:    bltz a5, .LBB13_7
+; RV32I-NEXT:    not t2, a4
+; RV32I-NEXT:    andi t1, t2, 63
+; RV32I-NEXT:    addi a5, t1, -32
+; RV32I-NEXT:    srli t0, a3, 1
+; RV32I-NEXT:    bltz a5, .LBB13_5
 ; RV32I-NEXT:  # %bb.4:
-; RV32I-NEXT:    mv t0, zero
-; RV32I-NEXT:    bgez a5, .LBB13_8
+; RV32I-NEXT:    srl a2, t0, a5
+; RV32I-NEXT:    bltz a7, .LBB13_6
+; RV32I-NEXT:    j .LBB13_7
 ; RV32I-NEXT:  .LBB13_5:
+; RV32I-NEXT:    srl a5, t0, t2
+; RV32I-NEXT:    or a1, a1, a5
 ; RV32I-NEXT:    slli a3, a3, 31
 ; RV32I-NEXT:    srli a2, a2, 1
 ; RV32I-NEXT:    or a2, a2, a3
-; RV32I-NEXT:    srl a1, a2, a1
-; RV32I-NEXT:    sub a2, a6, t3
-; RV32I-NEXT:    slli a3, t2, 1
-; RV32I-NEXT:    sll a2, a3, a2
-; RV32I-NEXT:    or a2, a1, a2
-; RV32I-NEXT:    or a1, a7, t0
-; RV32I-NEXT:    bgez t1, .LBB13_9
+; RV32I-NEXT:    srl a2, a2, t2
+; RV32I-NEXT:    sub a3, a6, t1
+; RV32I-NEXT:    slli a5, t0, 1
+; RV32I-NEXT:    sll a3, a5, a3
+; RV32I-NEXT:    or a2, a2, a3
+; RV32I-NEXT:    bgez a7, .LBB13_7
 ; RV32I-NEXT:  .LBB13_6:
 ; RV32I-NEXT:    sll a0, a0, a4
-; RV32I-NEXT:    or a0, a0, a2
-; RV32I-NEXT:    ret
+; RV32I-NEXT:    or a2, a2, a0
 ; RV32I-NEXT:  .LBB13_7:
-; RV32I-NEXT:    srl t0, t2, a1
-; RV32I-NEXT:    bltz a5, .LBB13_5
-; RV32I-NEXT:  .LBB13_8:
-; RV32I-NEXT:    srl a2, t2, a5
-; RV32I-NEXT:    or a1, a7, t0
-; RV32I-NEXT:    bltz t1, .LBB13_6
-; RV32I-NEXT:  .LBB13_9:
-; RV32I-NEXT:    or a0, zero, a2
+; RV32I-NEXT:    mv a0, a2
 ; RV32I-NEXT:    ret
 ;
 ; RV32IB-LABEL: fshl_i64:
@@ -605,54 +599,48 @@
 define i64 @fshr_i64(i64 %a, i64 %b, i64 %c) nounwind {
 ; RV32I-LABEL: fshr_i64:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    andi a5, a4, 63
-; RV32I-NEXT:    addi t1, a5, -32
-; RV32I-NEXT:    addi a6, zero, 31
-; RV32I-NEXT:    bltz t1, .LBB15_2
+; RV32I-NEXT:    mv t0, a0
+; RV32I-NEXT:    andi a0, a4, 63
+; RV32I-NEXT:    addi a6, a0, -32
+; RV32I-NEXT:    addi a7, zero, 31
+; RV32I-NEXT:    bltz a6, .LBB15_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    srl a7, a3, t1
+; RV32I-NEXT:    srl a0, a3, a6
 ; RV32I-NEXT:    j .LBB15_3
 ; RV32I-NEXT:  .LBB15_2:
-; RV32I-NEXT:    srl a7, a2, a4
-; RV32I-NEXT:    sub a5, a6, a5
-; RV32I-NEXT:    slli a2, a3, 1
-; RV32I-NEXT:    sll a2, a2, a5
-; RV32I-NEXT:    or a7, a7, a2
+; RV32I-NEXT:    srl a2, a2, a4
+; RV32I-NEXT:    sub a0, a7, a0
+; RV32I-NEXT:    slli a5, a3, 1
+; RV32I-NEXT:    sll a0, a5, a0
+; RV32I-NEXT:    or a0, a2, a0
 ; RV32I-NEXT:  .LBB15_3:
-; RV32I-NEXT:    not a2, a4
-; RV32I-NEXT:    andi t2, a2, 63
-; RV32I-NEXT:    addi a5, t2, -32
-; RV32I-NEXT:    slli t3, a0, 1
-; RV32I-NEXT:    bltz a5, .LBB15_7
+; RV32I-NEXT:    not t2, a4
+; RV32I-NEXT:    andi a5, t2, 63
+; RV32I-NEXT:    addi a2, a5, -32
+; RV32I-NEXT:    slli t1, t0, 1
+; RV32I-NEXT:    bltz a2, .LBB15_5
 ; RV32I-NEXT:  # %bb.4:
-; RV32I-NEXT:    mv t0, zero
-; RV32I-NEXT:    bgez a5, .LBB15_8
+; RV32I-NEXT:    sll a1, t1, a2
+; RV32I-NEXT:    bltz a6, .LBB15_6
+; RV32I-NEXT:    j .LBB15_7
 ; RV32I-NEXT:  .LBB15_5:
-; RV32I-NEXT:    lui a5, 524288
-; RV32I-NEXT:    addi a5, a5, -1
-; RV32I-NEXT:    and t3, a0, a5
-; RV32I-NEXT:    sub a5, a6, t2
-; RV32I-NEXT:    srl a5, t3, a5
-; RV32I-NEXT:    srli a0, a0, 31
+; RV32I-NEXT:    sll a2, t1, t2
+; RV32I-NEXT:    or a0, a0, a2
+; RV32I-NEXT:    lui a2, 524288
+; RV32I-NEXT:    addi a2, a2, -1
+; RV32I-NEXT:    and a2, t0, a2
+; RV32I-NEXT:    sub a5, a7, a5
+; RV32I-NEXT:    srl a2, a2, a5
+; RV32I-NEXT:    srli a5, t0, 31
 ; RV32I-NEXT:    slli a1, a1, 1
-; RV32I-NEXT:    or a0, a1, a0
-; RV32I-NEXT:    sll a0, a0, a2
-; RV32I-NEXT:    or a1, a0, a5
-; RV32I-NEXT:    or a0, t0, a7
-; RV32I-NEXT:    bgez t1, .LBB15_9
+; RV32I-NEXT:    or a1, a1, a5
+; RV32I-NEXT:    sll a1, a1, t2
+; RV32I-NEXT:    or a1, a1, a2
+; RV32I-NEXT:    bgez a6, .LBB15_7
 ; RV32I-NEXT:  .LBB15_6:
 ; RV32I-NEXT:    srl a2, a3, a4
 ; RV32I-NEXT:    or a1, a1, a2
-; RV32I-NEXT:    ret
 ; RV32I-NEXT:  .LBB15_7:
-; RV32I-NEXT:    sll t0, t3, a2
-; RV32I-NEXT:    bltz a5, .LBB15_5
-; RV32I-NEXT:  .LBB15_8:
-; RV32I-NEXT:    sll a1, t3, a5
-; RV32I-NEXT:    or a0, t0, a7
-; RV32I-NEXT:    bltz t1, .LBB15_6
-; RV32I-NEXT:  .LBB15_9:
-; RV32I-NEXT:    or a1, a1, zero
 ; RV32I-NEXT:    ret
 ;
 ; RV32IB-LABEL: fshr_i64:
Index: llvm/test/CodeGen/RISCV/select-binop-identity.ll
===================================================================
--- llvm/test/CodeGen/RISCV/select-binop-identity.ll
+++ llvm/test/CodeGen/RISCV/select-binop-identity.ll
@@ -13,21 +13,20 @@
 define signext i32 @and_select_all_ones_i32(i1 zeroext %c, i32 signext %x, i32 %y) {
 ; RV32I-LABEL: and_select_all_ones_i32:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    bnez a0, .LBB0_2
+; RV32I-NEXT:    beqz a0, .LBB0_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    addi a1, zero, -1
+; RV32I-NEXT:    and a2, a2, a1
 ; RV32I-NEXT:  .LBB0_2:
-; RV32I-NEXT:    and a0, a1, a2
+; RV32I-NEXT:    mv a0, a2
 ; RV32I-NEXT:    ret
 ;
 ; RV64I-LABEL: and_select_all_ones_i32:
 ; RV64I:       # %bb.0:
-; RV64I-NEXT:    bnez a0, .LBB0_2
+; RV64I-NEXT:    beqz a0, .LBB0_2
 ; RV64I-NEXT:  # %bb.1:
-; RV64I-NEXT:    addi a1, zero, -1
+; RV64I-NEXT:    and a2, a2, a1
 ; RV64I-NEXT:  .LBB0_2:
-; RV64I-NEXT:    and a0, a1, a2
-; RV64I-NEXT:    sext.w a0, a0
+; RV64I-NEXT:    sext.w a0, a2
 ; RV64I-NEXT:    ret
   %a = select i1 %c, i32 %x, i32 -1
   %b = and i32 %a, %y
@@ -37,25 +36,22 @@
 define i64 @and_select_all_ones_i64(i1 zeroext %c, i64 %x, i64 %y) {
 ; RV32I-LABEL: and_select_all_ones_i64:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    addi a6, zero, -1
-; RV32I-NEXT:    addi a5, zero, -1
 ; RV32I-NEXT:    bnez a0, .LBB1_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    mv a6, a2
-; RV32I-NEXT:    mv a5, a1
+; RV32I-NEXT:    and a3, a3, a1
+; RV32I-NEXT:    and a4, a4, a2
 ; RV32I-NEXT:  .LBB1_2:
-; RV32I-NEXT:    and a0, a3, a5
-; RV32I-NEXT:    and a1, a4, a6
+; RV32I-NEXT:    mv a0, a3
+; RV32I-NEXT:    mv a1, a4
 ; RV32I-NEXT:    ret
 ;
 ; RV64I-LABEL: and_select_all_ones_i64:
 ; RV64I:       # %bb.0:
-; RV64I-NEXT:    addi a3, zero, -1
 ; RV64I-NEXT:    bnez a0, .LBB1_2
 ; RV64I-NEXT:  # %bb.1:
-; RV64I-NEXT:    mv a3, a1
+; RV64I-NEXT:    and a2, a2, a1
 ; RV64I-NEXT:  .LBB1_2:
-; RV64I-NEXT:    and a0, a2, a3
+; RV64I-NEXT:    mv a0, a2
 ; RV64I-NEXT:    ret
   %a = select i1 %c, i64 -1, i64 %x
   %b = and i64 %y, %a
@@ -65,20 +61,20 @@
 define signext i32 @or_select_all_zeros_i32(i1 zeroext %c, i32 signext %x, i32 signext %y) {
 ; RV32I-LABEL: or_select_all_zeros_i32:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    bnez a0, .LBB2_2
+; RV32I-NEXT:    beqz a0, .LBB2_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    mv a1, zero
+; RV32I-NEXT:    or a2, a2, a1
 ; RV32I-NEXT:  .LBB2_2:
-; RV32I-NEXT:    or a0, a2, a1
+; RV32I-NEXT:    mv a0, a2
 ; RV32I-NEXT:    ret
 ;
 ; RV64I-LABEL: or_select_all_zeros_i32:
 ; RV64I:       # %bb.0:
-; RV64I-NEXT:    bnez a0, .LBB2_2
+; RV64I-NEXT:    beqz a0, .LBB2_2
 ; RV64I-NEXT:  # %bb.1:
-; RV64I-NEXT:    mv a1, zero
+; RV64I-NEXT:    or a2, a2, a1
 ; RV64I-NEXT:  .LBB2_2:
-; RV64I-NEXT:    or a0, a2, a1
+; RV64I-NEXT:    mv a0, a2
 ; RV64I-NEXT:    ret
   %a = select i1 %c, i32 %x, i32 0
   %b = or i32 %y, %a
@@ -88,25 +84,22 @@
 define i64 @or_select_all_zeros_i64(i1 zeroext %c, i64 %x, i64 %y) {
 ; RV32I-LABEL: or_select_all_zeros_i64:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    mv a6, zero
-; RV32I-NEXT:    mv a5, zero
 ; RV32I-NEXT:    bnez a0, .LBB3_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    mv a6, a2
-; RV32I-NEXT:    mv a5, a1
+; RV32I-NEXT:    or a3, a3, a1
+; RV32I-NEXT:    or a4, a4, a2
 ; RV32I-NEXT:  .LBB3_2:
-; RV32I-NEXT:    or a0, a5, a3
-; RV32I-NEXT:    or a1, a6, a4
+; RV32I-NEXT:    mv a0, a3
+; RV32I-NEXT:    mv a1, a4
 ; RV32I-NEXT:    ret
 ;
 ; RV64I-LABEL: or_select_all_zeros_i64:
 ; RV64I:       # %bb.0:
-; RV64I-NEXT:    mv a3, zero
 ; RV64I-NEXT:    bnez a0, .LBB3_2
 ; RV64I-NEXT:  # %bb.1:
-; RV64I-NEXT:    mv a3, a1
+; RV64I-NEXT:    or a2, a2, a1
 ; RV64I-NEXT:  .LBB3_2:
-; RV64I-NEXT:    or a0, a3, a2
+; RV64I-NEXT:    mv a0, a2
 ; RV64I-NEXT:    ret
   %a = select i1 %c, i64 0, i64 %x
   %b = or i64 %a, %y
@@ -116,22 +109,20 @@
 define signext i32 @xor_select_all_zeros_i32(i1 zeroext %c, i32 signext %x, i32 signext %y) {
 ; RV32I-LABEL: xor_select_all_zeros_i32:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    mv a3, zero
 ; RV32I-NEXT:    bnez a0, .LBB4_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    mv a3, a1
+; RV32I-NEXT:    xor a2, a2, a1
 ; RV32I-NEXT:  .LBB4_2:
-; RV32I-NEXT:    xor a0, a2, a3
+; RV32I-NEXT:    mv a0, a2
 ; RV32I-NEXT:    ret
 ;
 ; RV64I-LABEL: xor_select_all_zeros_i32:
 ; RV64I:       # %bb.0:
-; RV64I-NEXT:    mv a3, zero
 ; RV64I-NEXT:    bnez a0, .LBB4_2
 ; RV64I-NEXT:  # %bb.1:
-; RV64I-NEXT:    mv a3, a1
+; RV64I-NEXT:    xor a2, a2, a1
 ; RV64I-NEXT:  .LBB4_2:
-; RV64I-NEXT:    xor a0, a2, a3
+; RV64I-NEXT:    mv a0, a2
 ; RV64I-NEXT:    ret
   %a = select i1 %c, i32 0, i32 %x
   %b = xor i32 %y, %a
@@ -141,22 +132,22 @@
 define i64 @xor_select_all_zeros_i64(i1 zeroext %c, i64 %x, i64 %y) {
 ; RV32I-LABEL: xor_select_all_zeros_i64:
 ; RV32I:       # %bb.0:
-; RV32I-NEXT:    bnez a0, .LBB5_2
+; RV32I-NEXT:    beqz a0, .LBB5_2
 ; RV32I-NEXT:  # %bb.1:
-; RV32I-NEXT:    mv a2, zero
-; RV32I-NEXT:    mv a1, zero
+; RV32I-NEXT:    xor a3, a3, a1
+; RV32I-NEXT:    xor a4, a4, a2
 ; RV32I-NEXT:  .LBB5_2:
-; RV32I-NEXT:    xor a0, a1, a3
-; RV32I-NEXT:    xor a1, a2, a4
+; RV32I-NEXT:    mv a0, a3
+; RV32I-NEXT:    mv a1, a4
 ; RV32I-NEXT:    ret
 ;
 ; RV64I-LABEL: xor_select_all_zeros_i64:
 ; RV64I:       # %bb.0:
-; RV64I-NEXT:    bnez a0, .LBB5_2
+; RV64I-NEXT:    beqz a0, .LBB5_2
 ; RV64I-NEXT:  # %bb.1:
-; RV64I-NEXT:    mv a1, zero
+; RV64I-NEXT:    xor a2, a2, a1
 ; RV64I-NEXT:  .LBB5_2:
-; RV64I-NEXT:    xor a0, a1, a2
+; RV64I-NEXT:    mv a0, a2
 ; RV64I-NEXT:    ret
   %a = select i1 %c, i64 %x, i64 0
   %b = xor i64 %a, %y