[turbofan] Introduce CheckedUint32Div and CheckUint32Mod operators.

src/compiler/effect-control-linearizer.cc

 // Copyright 2015 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/effect-control-linearizer.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
@@ skipping 624 matching lines @@
       break;
     case IrOpcode::kCheckedInt32Sub:
       state = LowerCheckedInt32Sub(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckedInt32Div:
       state = LowerCheckedInt32Div(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckedInt32Mod:
       state = LowerCheckedInt32Mod(node, frame_state, *effect, *control);
       break;
+    case IrOpcode::kCheckedUint32Div:
+      state = LowerCheckedUint32Div(node, frame_state, *effect, *control);
+      break;
+    case IrOpcode::kCheckedUint32Mod:
+      state = LowerCheckedUint32Mod(node, frame_state, *effect, *control);
+      break;
     case IrOpcode::kCheckedUint32ToInt32:
       state = LowerCheckedUint32ToInt32(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckedFloat64ToInt32:
       state = LowerCheckedFloat64ToInt32(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckedTaggedToInt32:
       state = LowerCheckedTaggedToInt32(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckedTaggedToFloat64:
@@ skipping 587 matching lines @@
   control = graph()->NewNode(common()->Merge(2), if_true0, if_false0);
   effect = graph()->NewNode(common()->EffectPhi(2), etrue0, efalse0, control);
   Node* value =
       graph()->NewNode(common()->Phi(MachineRepresentation::kWord32, 2), vtrue0,
                        vfalse0, control);
 
   return ValueEffectControl(value, effect, control);
 }
 
 EffectControlLinearizer::ValueEffectControl
+EffectControlLinearizer::LowerCheckedUint32Div(Node* node, Node* frame_state,
+                                               Node* effect, Node* control) {
+  Node* zero = jsgraph()->Int32Constant(0);
+
+  Node* lhs = node->InputAt(0);
+  Node* rhs = node->InputAt(1);
+
+  // Ensure that {rhs} is not zero, otherwise we'd have to return NaN.
+  Node* check = graph()->NewNode(machine()->Word32Equal(), rhs, zero);
+  control = effect = graph()->NewNode(common()->DeoptimizeIf(), check,
+                                      frame_state, effect, control);
+
+  // Perform the actual unsigned integer division.
+  Node* value = graph()->NewNode(machine()->Uint32Div(), lhs, rhs, control);
+
+  // Check if the remainder is non-zero.
+  check = graph()->NewNode(machine()->Word32Equal(), lhs,
+                           graph()->NewNode(machine()->Int32Mul(), rhs, value));
+  control = effect = graph()->NewNode(common()->DeoptimizeUnless(), check,
+                                      frame_state, effect, control);
+
+  return ValueEffectControl(value, effect, control);
+}
+
+EffectControlLinearizer::ValueEffectControl
+EffectControlLinearizer::LowerCheckedUint32Mod(Node* node, Node* frame_state,
+                                               Node* effect, Node* control) {
+  Node* zero = jsgraph()->Int32Constant(0);
+
+  Node* lhs = node->InputAt(0);
+  Node* rhs = node->InputAt(1);
+
+  // Ensure that {rhs} is not zero, otherwise we'd have to return NaN.
+  Node* check = graph()->NewNode(machine()->Word32Equal(), rhs, zero);
+  control = effect = graph()->NewNode(common()->DeoptimizeIf(), check,
+                                      frame_state, effect, control);
+
+  // Perform the actual unsigned integer modulus.
+  Node* value = graph()->NewNode(machine()->Uint32Mod(), lhs, rhs, control);
+
+  return ValueEffectControl(value, effect, control);
+}
+
+EffectControlLinearizer::ValueEffectControl
 EffectControlLinearizer::LowerCheckedUint32ToInt32(Node* node,
                                                    Node* frame_state,
                                                    Node* effect,
                                                    Node* control) {
   Node* value = node->InputAt(0);
   Node* max_int = jsgraph()->Int32Constant(std::numeric_limits<int32_t>::max());
   Node* is_safe =
       graph()->NewNode(machine()->Uint32LessThanOrEqual(), value, max_int);
   control = effect = graph()->NewNode(common()->DeoptimizeUnless(), is_safe,
                                       frame_state, effect, control);
@@ skipping 748 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoThrow);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8