Bug 1886035 - Update some SpiderMonkey defines from XP_MACOSX to XP_DARWIN, r=spidermonkey-reviewers,jandem

XP_IOS should be treated more like other apple platforms, as they use
roughly the same architecture.

Differential Revision: https://phabricator.services.mozilla.com/D205003

js/public/HeapAPI.h

@@ -45,7 +45,7 @@ const size_t ArenaShift = 12;
 const size_t ArenaSize = size_t(1) << ArenaShift;
 const size_t ArenaMask = ArenaSize - 1;
 
-#if defined(XP_MACOSX) && defined(__aarch64__)
+#if defined(XP_DARWIN) && defined(__aarch64__)
 const size_t PageShift = 14;
 #else
 const size_t PageShift = 12;

js/public/RootingAPI.h

@@ -232,7 +232,7 @@ struct SafelyInitialized {
     // |T| per C++11 [expr.type.conv]p2 -- will produce a safely-initialized,
     // safely-usable T that it can return.
 
-#if defined(XP_WIN) || defined(XP_MACOSX) || \
+#if defined(XP_WIN) || defined(XP_DARWIN) || \
     (defined(XP_UNIX) && !defined(__clang__))
 
     // That presumption holds for pointers, where value initialization produces

js/src/jit/PerfSpewer.cpp

@@ -23,7 +23,7 @@
 #  define gettid() static_cast<pid_t>(syscall(__NR_gettid))
 #endif
 
-#if defined(JS_ION_PERF) && (defined(ANDROID) || defined(XP_MACOSX))
+#if defined(JS_ION_PERF) && (defined(ANDROID) || defined(XP_DARWIN))
 #  include <limits.h>
 #  include <stdlib.h>
 #  include <unistd.h>
@@ -42,7 +42,7 @@ char* get_current_dir_name() {
 }
 #endif
 
-#if defined(JS_ION_PERF) && defined(XP_MACOSX)
+#if defined(JS_ION_PERF) && defined(XP_DARWIN)
 #  include <pthread.h>
 #  include <unistd.h>
 
@@ -128,7 +128,7 @@ static uint64_t GetMonotonicTimestamp() {
   return TimeStamp::Now().RawClockMonotonicNanosecondsSinceBoot();
 #  elif XP_WIN
   return TimeStamp::Now().RawQueryPerformanceCounterValue().value();
-#  elif XP_MACOSX
+#  elif XP_DARWIN
   return TimeStamp::Now().RawMachAbsoluteTimeNanoseconds();
 #  else
   MOZ_CRASH("no timestamp");

js/src/jit/arm64/vixl/Cpu-vixl.cpp

@@ -214,7 +214,7 @@ CPUFeatures CPU::InferCPUFeaturesFromOS(
   for (size_t i = 0; i < kFeatureBitCount; i++) {
     if (auxv & (1UL << i)) features.Combine(kFeatureBits[i]);
   }
-#elif defined(XP_MACOSX)
+#elif defined(XP_DARWIN)
   // Apple processors have kJSCVT, kDotProduct, and kAtomics features.
   features.Combine(CPUFeatures::kJSCVT, CPUFeatures::kDotProduct,
                    CPUFeatures::kAtomics);