From: Richard Henderson <rth@redhat.com>
Date: Sun, 27 Nov 2011 00:20:48 +0000 (-0800)
Subject: arm: Install __sync libfuncs for Linux.
X-Git-Tag: releases/gcc-4.7.0~1935
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=380af8096daaabbdfc0d112f02f62814a670e524;p=thirdparty%2Fgcc.git

arm: Install __sync libfuncs for Linux.

        * config/arm/arm.c (arm_init_libfuncs): Call init_sync_libfuncs
        for Linux.

From-SVN: r181755
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c16f1d8db583..5a6b5d33733e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-11-26  Richard Henderson  <rth@redhat.com>
+
+	* config/arm/arm.c (arm_init_libfuncs): Call init_sync_libfuncs
+	for Linux.
+
 2011-11-26  Richard Henderson  <rth@redhat.com>
 
 	* optabs.c (expand_atomic_fetch_op): Always return result.
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index e3b0b883ec81..ee26c51b0a0c 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -1096,6 +1096,10 @@ arm_set_fixed_conv_libfunc (convert_optab optable, enum machine_mode to,
 static void
 arm_init_libfuncs (void)
 {
+  /* For Linux, we have access to kernel support for atomic operations.  */
+  if (arm_abi == ARM_ABI_AAPCS_LINUX)
+    init_sync_libfuncs (2 * UNITS_PER_WORD);
+
   /* There are no special library functions unless we are using the
      ARM BPABI.  */
   if (!TARGET_BPABI)