From: Tamar Christina <tamar.christina@arm.com>
Date: Thu, 18 Aug 2016 08:45:53 +0000 (+0000)
Subject: [PATCH] [GCC] Don't use section anchors for declarations that don't fit in a single... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=65d21eaf7067d2e41210a74fde9db825274bad2d;p=gcc.git

[PATCH] [GCC] Don't use section anchors for declarations that don't fit in a single anchor range

On behalf of Tamar Christina  <tamar.christina@arm.com>.

gcc/

	* varasm.c (default_use_anchors_for_symbol_p): Reject too large decls.


Co-Authored-By: Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>

From-SVN: r239561
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 17dab645a95..5d89dbb8e5e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-08-18  Tamar Christina  <tamar.christina@arm.com>
+	    Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	* varasm.c (default_use_anchors_for_symbol_p): Reject too large decls.
+
 2016-08-18  Richard Biener  <rguenther@suse.de>
 
 	* ssa-iterators.h (ssa_vuse_operand): New inline.
diff --git a/gcc/varasm.c b/gcc/varasm.c
index e747d2c4721..00a9b30e73c 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -6793,6 +6793,15 @@ default_use_anchors_for_symbol_p (const_rtx symbol)
 	 sections that should be marked as small in the section directive.  */
       if (targetm.in_small_data_p (decl))
 	return false;
+
+      /* Don't use section anchors for decls that won't fit inside a single
+	 anchor range to reduce the amount of instructions require to refer
+	 to the entire declaration.  */
+      if (decl && DECL_SIZE (decl)
+	 && tree_to_shwi (DECL_SIZE (decl))
+	    >= (targetm.max_anchor_offset * BITS_PER_UNIT))
+	return false;
+
     }
   return true;
 }