[arm64] Support passing more than eight arguments to C functions

src/compiler/arm64/instruction-selector-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/assembler-inl.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
 namespace v8 {
@@ skipping 1758 matching lines @@
   bool always_claim = to_native_stack != from_native_stack;
 
   int claim_count = static_cast<int>(arguments->size());
   int slot = claim_count - 1;
   // Bump the stack pointer(s).
   if (claim_count > 0 || always_claim) {
     // TODO(titzer): claim and poke probably take small immediates.
     // TODO(titzer): it would be better to bump the csp here only
     //                and emit paired stores with increment for non c frames.
     ArchOpcode claim = to_native_stack ? kArm64ClaimCSP : kArm64ClaimJSSP;
-    // Claim(0) isn't a nop if there is a mismatch between CSP and JSSP.
+    // ClaimJSSP(0) or ClaimCSP(0) isn't a nop if there is a mismatch between
+    // CSP and JSSP.
     Emit(claim, g.NoOutput(), g.TempImmediate(claim_count));
   }
 
   // Poke the arguments into the stack.
   ArchOpcode poke = to_native_stack ? kArm64PokeCSP : kArm64PokeJSSP;
   while (slot >= 0) {
     Emit(poke, g.NoOutput(), g.UseRegister((*arguments)[slot].node()),
          g.TempImmediate(slot));
     slot--;
     // TODO(ahaas): Poke arguments in pairs if two subsequent arguments have the
@@ skipping 1075 matching lines @@
 // static
 MachineOperatorBuilder::AlignmentRequirements
 InstructionSelector::AlignmentRequirements() {
   return MachineOperatorBuilder::AlignmentRequirements::
       FullUnalignedAccessSupport();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8