[turbofan] Introduce CheckIf simplified operator.

src/compiler/simplified-operator.cc

 // Copyright 2012 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-operator.h"
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/types.h"
@@ skipping 287 matching lines @@
   V(StringLessThan, Operator::kNoProperties, 2)            \
   V(StringLessThanOrEqual, Operator::kNoProperties, 2)
 
 #define SPECULATIVE_BINOP_LIST(V) \
   V(SpeculativeNumberAdd)         \
   V(SpeculativeNumberSubtract)    \
   V(SpeculativeNumberDivide)      \
   V(SpeculativeNumberMultiply)    \
   V(SpeculativeNumberModulus)
 
-#define CHECKED_OP_LIST(V)    \
-  V(CheckNumber, 1)           \
-  V(CheckTaggedPointer, 1)    \
-  V(CheckTaggedSigned, 1)     \
-  V(CheckedInt32Add, 2)       \
-  V(CheckedInt32Sub, 2)       \
-  V(CheckedUint32ToInt32, 1)  \
-  V(CheckedFloat64ToInt32, 1) \
-  V(CheckedTaggedToInt32, 1)  \
-  V(CheckedTaggedToFloat64, 1)
+#define CHECKED_OP_LIST(V)       \
+  V(CheckBounds, 2, 1)           \
+  V(CheckIf, 1, 0)               \
+  V(CheckNumber, 1, 1)           \
+  V(CheckTaggedPointer, 1, 1)    \
+  V(CheckTaggedSigned, 1, 1)     \
+  V(CheckedInt32Add, 2, 1)       \
+  V(CheckedInt32Sub, 2, 1)       \
+  V(CheckedUint32ToInt32, 1, 1)  \
+  V(CheckedFloat64ToInt32, 1, 1) \
+  V(CheckedTaggedToInt32, 1, 1)  \
+  V(CheckedTaggedToFloat64, 1, 1)
 
 struct SimplifiedOperatorGlobalCache final {
 #define PURE(Name, properties, input_count)                                \
   struct Name##Operator final : public Operator {                          \
     Name##Operator()                                                       \
         : Operator(IrOpcode::k##Name, Operator::kPure | properties, #Name, \
                    input_count, 0, 0, 1, 0, 0) {}                          \
   };                                                                       \
   Name##Operator k##Name;
   PURE_OP_LIST(PURE)
 #undef PURE
 
-#define CHECKED(Name, value_input_count)                            \
-  struct Name##Operator final : public Operator {                   \
-    Name##Operator()                                                \
-        : Operator(IrOpcode::k##Name,                               \
-                   Operator::kFoldable | Operator::kNoThrow, #Name, \
-                   value_input_count, 1, 1, 1, 1, 0) {}             \
-  };                                                                \
+#define CHECKED(Name, value_input_count, value_output_count)             \
+  struct Name##Operator final : public Operator {                        \
+    Name##Operator()                                                     \
+        : Operator(IrOpcode::k##Name,                                    \
+                   Operator::kFoldable | Operator::kNoThrow, #Name,      \
+                   value_input_count, 1, 1, value_output_count, 1, 0) {} \
+  };                                                                     \
   Name##Operator k##Name;
   CHECKED_OP_LIST(CHECKED)
 #undef CHECKED
 
   template <CheckFloat64HoleMode kMode>
   struct CheckFloat64HoleNaNOperator final
       : public Operator1<CheckFloat64HoleMode> {
     CheckFloat64HoleNaNOperator()
         : Operator1<CheckFloat64HoleMode>(
               IrOpcode::kCheckFloat64Hole,
@@ skipping 58 matching lines @@
 
 
 SimplifiedOperatorBuilder::SimplifiedOperatorBuilder(Zone* zone)
     : cache_(kCache.Get()), zone_(zone) {}
 
 #define GET_FROM_CACHE(Name, properties, input_count) \
   const Operator* SimplifiedOperatorBuilder::Name() { return &cache_.k##Name; }
 PURE_OP_LIST(GET_FROM_CACHE)
 #undef GET_FROM_CACHE
 
-#define GET_FROM_CACHE(Name, value_input_count) \
+#define GET_FROM_CACHE(Name, value_input_count, value_output_count) \
   const Operator* SimplifiedOperatorBuilder::Name() { return &cache_.k##Name; }
 CHECKED_OP_LIST(GET_FROM_CACHE)
 #undef GET_FROM_CACHE
 
 const Operator* SimplifiedOperatorBuilder::CheckFloat64Hole(
     CheckFloat64HoleMode mode) {
   switch (mode) {
     case CheckFloat64HoleMode::kAllowReturnHole:
       return &cache_.kCheckFloat64HoleAllowReturnHoleOperator;
     case CheckFloat64HoleMode::kNeverReturnHole:
@@ skipping 14 matching lines @@
   UNREACHABLE();
   return nullptr;
 }
 
 const Operator* SimplifiedOperatorBuilder::ReferenceEqual(Type* type) {
   return new (zone()) Operator(IrOpcode::kReferenceEqual,
                                Operator::kCommutative | Operator::kPure,
                                "ReferenceEqual", 2, 0, 0, 1, 0, 0);
 }
 
-const Operator* SimplifiedOperatorBuilder::CheckBounds() {
-  // TODO(bmeurer): Cache this operator. Make it pure!
-  return new (zone())
-      Operator(IrOpcode::kCheckBounds, Operator::kFoldable | Operator::kNoThrow,
-               "CheckBounds", 2, 1, 1, 1, 1, 0);
-}
-
 const Operator* SimplifiedOperatorBuilder::Allocate(PretenureFlag pretenure) {
   switch (pretenure) {
     case NOT_TENURED:
       return &cache_.kAllocateNotTenuredOperator;
     case TENURED:
       return &cache_.kAllocateTenuredOperator;
   }
   UNREACHABLE();
   return nullptr;
 }
@@ skipping 72 matching lines @@
                         Operator::kNoDeopt | Operator::kNoThrow | properties,  \
                         #Name, value_input_count, 1, control_input_count,      \
                         output_count, 1, 0, access);                           \
   }
 ACCESS_OP_LIST(ACCESS)
 #undef ACCESS
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8