[turbofan] Project exception value out of calls.

src/compiler/instruction-selector.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/instruction-selector.h"
 
 #include <limits>
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 578 matching lines @@
     }
   }
   switch (node->opcode()) {
     case IrOpcode::kStart:
     case IrOpcode::kLoop:
     case IrOpcode::kEnd:
     case IrOpcode::kBranch:
     case IrOpcode::kIfTrue:
     case IrOpcode::kIfFalse:
     case IrOpcode::kIfSuccess:
-    case IrOpcode::kIfException:
     case IrOpcode::kSwitch:
     case IrOpcode::kIfValue:
     case IrOpcode::kIfDefault:
     case IrOpcode::kEffectPhi:
     case IrOpcode::kMerge:
       // No code needed for these graph artifacts.
       return;
+    case IrOpcode::kIfException:
+      return MarkAsReference(node), VisitIfException(node);
     case IrOpcode::kFinish:
       return MarkAsReference(node), VisitFinish(node);
     case IrOpcode::kParameter: {
       MachineType type = linkage()->GetParameterType(OpParameter<int>(node));
       MarkAsRepresentation(type, node);
       return VisitParameter(node);
     }
     case IrOpcode::kOsrValue:
       return MarkAsReference(node), VisitOsrValue(node);
     case IrOpcode::kPhi: {
@@ skipping 345 matching lines @@
 
 void InstructionSelector::VisitParameter(Node* node) {
   OperandGenerator g(this);
   int index = OpParameter<int>(node);
   Emit(kArchNop,
        g.DefineAsLocation(node, linkage()->GetParameterLocation(index),
                           linkage()->GetParameterType(index)));
 }
 
 
+void InstructionSelector::VisitIfException(Node* node) {
+  OperandGenerator g(this);
+  Node* call = node->InputAt(0);
+  DCHECK_EQ(IrOpcode::kCall, call->opcode());
+  const CallDescriptor* descriptor = OpParameter<const CallDescriptor*>(call);
+  Emit(kArchNop, g.DefineAsLocation(node, descriptor->GetReturnLocation(0),
+                                    descriptor->GetReturnType(0)));
+}
+
+
 void InstructionSelector::VisitOsrValue(Node* node) {
   OperandGenerator g(this);
   int index = OpParameter<int>(node);
   Emit(kArchNop, g.DefineAsLocation(node, linkage()->GetOsrValueLocation(index),
                                     kMachAnyTagged));
 }
 
 
 void InstructionSelector::VisitPhi(Node* node) {
   const int input_count = node->op()->ValueInputCount();
@@ skipping 201 matching lines @@
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   return MachineOperatorBuilder::Flag::kNoFlags;
 }
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8