From 775fe302a75c4770edd9708e7348e626c96dfe58 Mon Sep 17 00:00:00 2001
From: Jason Evans <jasone@canonware.com>
Date: Fri, 22 Feb 2019 11:10:11 -0800
Subject: [PATCH] Remove JE_FORCE_SYNC_COMPARE_AND_SWAP_[48].

These macros have been unused since
d4ac7582f32f506d5203bea2f0115076202add38 (Introduce a backport of C11
atomics).
---
 configure.ac                                  | 34 -------------------
 .../internal/jemalloc_internal_defs.h.in      | 16 ---------
 2 files changed, 50 deletions(-)

diff --git a/configure.ac b/configure.ac
index 9b00bbfc..4dafed58 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2005,40 +2005,6 @@ case "${host_cpu}" in
 esac
 fi
 
-dnl ============================================================================
-dnl Check whether __sync_{add,sub}_and_fetch() are available despite
-dnl __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n macros being undefined.
-
-AC_DEFUN([JE_SYNC_COMPARE_AND_SWAP_CHECK],[
-  AC_CACHE_CHECK([whether to force $1-bit __sync_{add,sub}_and_fetch()],
-               [je_cv_sync_compare_and_swap_$2],
-               [AC_LINK_IFELSE([AC_LANG_PROGRAM([
-                                                 #include <stdint.h>
-                                                ],
-                                                [
-                                                 #ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_$2
-                                                 {
-                                                    uint$1_t x$1 = 0;
-                                                    __sync_add_and_fetch(&x$1, 42);
-                                                    __sync_sub_and_fetch(&x$1, 1);
-                                                 }
-                                                 #else
-                                                 #error __GCC_HAVE_SYNC_COMPARE_AND_SWAP_$2 is defined, no need to force
-                                                 #endif
-                                                ])],
-                               [je_cv_sync_compare_and_swap_$2=yes],
-                               [je_cv_sync_compare_and_swap_$2=no])])
-
-  if test "x${je_cv_sync_compare_and_swap_$2}" = "xyes" ; then
-    AC_DEFINE([JE_FORCE_SYNC_COMPARE_AND_SWAP_$2], [ ])
-  fi
-])
-
-if test "x${je_cv_atomic9}" != "xyes" -a "x${je_cv_osatomic}" != "xyes" ; then
-  JE_SYNC_COMPARE_AND_SWAP_CHECK(32, 4)
-  JE_SYNC_COMPARE_AND_SWAP_CHECK(64, 8)
-fi
-
 dnl ============================================================================
 dnl Check for __builtin_clz() and __builtin_clzl().
 
diff --git a/include/jemalloc/internal/jemalloc_internal_defs.h.in b/include/jemalloc/internal/jemalloc_internal_defs.h.in
index 4f0359a8..7914b2f6 100644
--- a/include/jemalloc/internal/jemalloc_internal_defs.h.in
+++ b/include/jemalloc/internal/jemalloc_internal_defs.h.in
@@ -52,22 +52,6 @@
 /* Defined if GCC __sync atomics are available. */
 #undef JEMALLOC_GCC_SYNC_ATOMICS
 
-/*
- * Defined if __sync_add_and_fetch(uint32_t *, uint32_t) and
- * __sync_sub_and_fetch(uint32_t *, uint32_t) are available, despite
- * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 not being defined (which means the
- * functions are defined in libgcc instead of being inlines).
- */
-#undef JE_FORCE_SYNC_COMPARE_AND_SWAP_4
-
-/*
- * Defined if __sync_add_and_fetch(uint64_t *, uint64_t) and
- * __sync_sub_and_fetch(uint64_t *, uint64_t) are available, despite
- * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 not being defined (which means the
- * functions are defined in libgcc instead of being inlines).
- */
-#undef JE_FORCE_SYNC_COMPARE_AND_SWAP_8
-
 /*
  * Defined if __builtin_clz() and __builtin_clzl() are available.
  */