[turbofan] reduce allocations outside of pipeline

src/compiler/arm64/code-generator-arm64.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/code-generator.h"
 
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 734 matching lines @@
 void CodeGenerator::AssemblePrologue() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
   if (descriptor->kind() == CallDescriptor::kCallAddress) {
     __ SetStackPointer(csp);
     __ Push(lr, fp);
     __ Mov(fp, csp);
     // TODO(dcarney): correct callee saved registers.
     __ PushCalleeSavedRegisters();
     frame()->SetRegisterSaveAreaSize(20 * kPointerSize);
   } else if (descriptor->IsJSFunctionCall()) {
-    CompilationInfo* info = linkage()->info();
+    CompilationInfo* info = this->info();
     __ SetStackPointer(jssp);
     __ Prologue(info->IsCodePreAgingActive());
     frame()->SetRegisterSaveAreaSize(
         StandardFrameConstants::kFixedFrameSizeFromFp);
 
     // Sloppy mode functions and builtins need to replace the receiver with the
     // global proxy when called as functions (without an explicit receiver
     // object).
     // TODO(mstarzinger/verwaest): Should this be moved back into the CallIC?
     if (info->strict_mode() == SLOPPY && !info->is_native()) {
@@ skipping 194 matching lines @@
     UNREACHABLE();
   }
 }
 
 
 void CodeGenerator::AddNopForSmiCodeInlining() { __ movz(xzr, 0); }
 
 
 void CodeGenerator::EnsureSpaceForLazyDeopt() {
   int space_needed = Deoptimizer::patch_size();
-  if (!linkage()->info()->IsStub()) {
+  if (!info()->IsStub()) {
     // Ensure that we have enough space after the previous lazy-bailout
     // instruction for patching the code here.
     intptr_t current_pc = masm()->pc_offset();
 
     if (current_pc < (last_lazy_deopt_pc_ + space_needed)) {
       intptr_t padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
       DCHECK((padding_size % kInstructionSize) == 0);
       InstructionAccurateScope instruction_accurate(
           masm(), padding_size / kInstructionSize);
 
       while (padding_size > 0) {
         __ nop();
         padding_size -= kInstructionSize;
       }
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8