[turbofan] Don't spread global flag checks all over the compiler code.

test/unittests/compiler/instruction-selector-unittest.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 "test/unittests/compiler/instruction-selector-unittest.h"
 
 #include "src/code-stubs.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/schedule.h"
 #include "src/flags.h"
@@ skipping 11 matching lines @@
 
 
 InstructionSelectorTest::InstructionSelectorTest() : rng_(FLAG_random_seed) {}
 
 
 InstructionSelectorTest::~InstructionSelectorTest() {}
 
 
 InstructionSelectorTest::Stream InstructionSelectorTest::StreamBuilder::Build(
     InstructionSelector::Features features,
-    InstructionSelectorTest::StreamBuilderMode mode) {
+    InstructionSelectorTest::StreamBuilderMode mode,
+    InstructionSelector::SourcePositionMode source_position_mode) {
   Schedule* schedule = Export();
   if (FLAG_trace_turbo) {
     OFStream out(stdout);
     out << "=== Schedule before instruction selection ===" << std::endl
         << *schedule;
   }
   size_t const node_count = graph()->NodeCount();
   EXPECT_NE(0u, node_count);
   Linkage linkage(call_descriptor());
   InstructionBlocks* instruction_blocks =
       InstructionSequence::InstructionBlocksFor(test_->zone(), schedule);
   InstructionSequence sequence(test_->isolate(), test_->zone(),
                                instruction_blocks);
   SourcePositionTable source_position_table(graph());
   InstructionSelector selector(test_->zone(), node_count, &linkage, &sequence,
-                               schedule, &source_position_table, features);
+                               schedule, &source_position_table,
+                               source_position_mode, features);
   selector.SelectInstructions();
   if (FLAG_trace_turbo) {
     OFStream out(stdout);
     PrintableInstructionSequence printable = {
         RegisterConfiguration::ArchDefault(), &sequence};
     out << "=== Code sequence after instruction selection ===" << std::endl
         << printable;
   }
   Stream s;
   s.virtual_registers_ = selector.GetVirtualRegistersForTesting();
@@ skipping 575 matching lines @@
       EXPECT_EQ(kArchCallCodeObject, s[1]->arch_opcode());
       EXPECT_EQ(kArchRet, s[2]->arch_opcode());
       EXPECT_EQ(kArchNop, s[3]->arch_opcode());
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8