[turbofan] Adds speculative opcodes for shift right.

src/compiler/simplified-lowering.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/address-map.h"
 #include "src/base/bits.h"
@@ skipping 1674 matching lines @@
       }
       case IrOpcode::kNumberShiftRight: {
         Type* rhs_type = GetUpperBound(node->InputAt(1));
         VisitBinop(node, UseInfo::TruncatingWord32(),
                    UseInfo::TruncatingWord32(), MachineRepresentation::kWord32);
         if (lower()) {
           lowering->DoShift(node, lowering->machine()->Word32Sar(), rhs_type);
         }
         return;
       }
+      case IrOpcode::kSpeculativeNumberShiftRight: {
+        // ToNumber(x) can throw if x is either a Receiver or a Symbol, so we
+        // can only eliminate an unused speculative number operation if we know
+        // that the inputs are PlainPrimitive, which excludes everything that's
+        // might have side effects or throws during a ToNumber conversion.
+        if (BothInputsAre(node, Type::PlainPrimitive())) {
+          if (truncation.IsUnused()) return VisitUnused(node);
+        }
+        if (BothInputsAre(node, Type::NumberOrOddball())) {
+          Type* rhs_type = GetUpperBound(node->InputAt(1));
+          VisitBinop(node, UseInfo::TruncatingWord32(),
+                     UseInfo::TruncatingWord32(),
+                     MachineRepresentation::kWord32);
+          if (lower()) {
+            lowering->DoShift(node, lowering->machine()->Word32Sar(), rhs_type);
+          }
+          return;
+        }
+        BinaryOperationHints::Hint hint = BinaryOperationHintOf(node->op());
+        Type* rhs_type = GetUpperBound(node->InputAt(1));
+        VisitBinop(node, hint == BinaryOperationHints::kNumberOrOddball
+                             ? UseInfo::CheckedNumberOrOddballAsWord32()
+                             : UseInfo::CheckedSigned32AsWord32(),
+                   MachineRepresentation::kWord32, Type::Signed32());
+        if (lower()) {
+          lowering->DoShift(node, lowering->machine()->Word32Sar(), rhs_type);
+        }
+        return;
+      }
       case IrOpcode::kNumberShiftRightLogical: {
         Type* rhs_type = GetUpperBound(node->InputAt(1));
         VisitBinop(node, UseInfo::TruncatingWord32(),
                    UseInfo::TruncatingWord32(), MachineRepresentation::kWord32);
         if (lower()) {
           lowering->DoShift(node, lowering->machine()->Word32Shr(), rhs_type);
         }
         return;
       }
+      case IrOpcode::kSpeculativeNumberShiftRightLogical: {
+        // ToNumber(x) can throw if x is either a Receiver or a Symbol, so we
+        // can only eliminate an unused speculative number operation if we know
+        // that the inputs are PlainPrimitive, which excludes everything that's
+        // might have side effects or throws during a ToNumber conversion.
+        if (BothInputsAre(node, Type::PlainPrimitive())) {
+          if (truncation.IsUnused()) return VisitUnused(node);
+        }
+        if (BothInputsAre(node, Type::NumberOrOddball())) {
+          Type* rhs_type = GetUpperBound(node->InputAt(1));
+          VisitBinop(node, UseInfo::TruncatingWord32(),
+                     UseInfo::TruncatingWord32(),
+                     MachineRepresentation::kWord32);
+          if (lower()) {
+            lowering->DoShift(node, lowering->machine()->Word32Shr(), rhs_type);
+          }
+          return;
+        }
+        BinaryOperationHints::Hint hint = BinaryOperationHintOf(node->op());
+        Type* rhs_type = GetUpperBound(node->InputAt(1));
+        VisitBinop(node, hint == BinaryOperationHints::kNumberOrOddball
+                             ? UseInfo::CheckedNumberOrOddballAsWord32()
+                             : UseInfo::CheckedSigned32AsWord32(),
+                   MachineRepresentation::kWord32, Type::Unsigned32());
+        if (lower()) {
+          lowering->DoShift(node, lowering->machine()->Word32Shr(), rhs_type);
+        }
+        return;
+      }
       case IrOpcode::kNumberAbs: {
         if (TypeOf(node->InputAt(0))->Is(Type::Unsigned32())) {
           VisitUnop(node, UseInfo::TruncatingWord32(),
                     MachineRepresentation::kWord32);
           if (lower()) DeferReplacement(node, node->InputAt(0));
         } else if (TypeOf(node->InputAt(0))->Is(Type::Signed32())) {
           VisitUnop(node, UseInfo::TruncatingWord32(),
                     MachineRepresentation::kWord32);
           if (lower()) DeferReplacement(node, lowering->Int32Abs(node));
         } else if (TypeOf(node->InputAt(0))
@@ skipping 1799 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoProperties);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8