[libpas] Enable libpas on iOS family

https://bugs.webkit.org/show_bug.cgi?id=232026

Reviewed by Filip Pizlo.

Enabling libpas on iOS family platforms. This helps libpas transition.
And it offers large performance improvement.

    1. Speedometer2 is 0.7% improved on low-end iOS device (iPhone 6s Plus), 1.3% improved on high-end iOS device (iPhone 12).
    2. JetStream2 is neutral on both.

* bmalloc/BPlatform.h:



Canonical link: https://commits.webkit.org/243995@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@285442 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/bmalloc/ChangeLog

@@ -1,3 +1,18 @@
+2021-11-08  Yusuke Suzuki  <ysuzuki@apple.com>
+
+        [libpas] Enable libpas on iOS family
+        https://bugs.webkit.org/show_bug.cgi?id=232026
+
+        Reviewed by Filip Pizlo.
+
+        Enabling libpas on iOS family platforms. This helps libpas transition.
+        And it offers large performance improvement.
+
+            1. Speedometer2 is 0.7% improved on low-end iOS device (iPhone 6s Plus), 1.3% improved on high-end iOS device (iPhone 12).
+            2. JetStream2 is neutral on both.
+
+        * bmalloc/BPlatform.h:
+
 2021-11-08  Yusuke Suzuki  <ysuzuki@apple.com>
 
         Unreviewed, tweak header include

Source/bmalloc/bmalloc/BPlatform.h

@@ -311,7 +311,7 @@
 
 /* BENABLE(LIBPAS) is enabling libpas build. But this does not mean we use libpas for bmalloc replacement. */
 #if !defined(BENABLE_LIBPAS)
-#if BOS(MAC)
+#if BPLATFORM(COCOA) && BCPU(ADDRESS64)
 #define BENABLE_LIBPAS 1
 #else
 #define BENABLE_LIBPAS 0