From: Ulrich Weigand <uweigand@de.ibm.com>
Date: Tue, 17 Nov 2009 16:10:03 +0000 (+0000)
Subject: spu.c (get_pic_reg): Use LAST_ARG_REGNUM as PIC registers in leaf functions if possible.
X-Git-Tag: releases/gcc-4.3.5~291
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=53119a8f21bc3fc1b6363362a1c92813541c8b93;p=thirdparty%2Fgcc.git

spu.c (get_pic_reg): Use LAST_ARG_REGNUM as PIC registers in leaf functions if possible.

	* config/spu/spu.c (get_pic_reg): Use LAST_ARG_REGNUM as PIC
	registers in leaf functions if possible.

From-SVN: r154252
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index efbcb8554430..6b8bb8da5e76 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2009-11-17  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	* config/spu/spu.c (get_pic_reg): Use LAST_ARG_REGNUM as PIC
+	registers in leaf functions if possible.
+
 2009-11-14  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/predicates.md (call_register_no_elim_operand):
diff --git a/gcc/config/spu/spu.c b/gcc/config/spu/spu.c
index 811bf5aef092..8c9a8d287e68 100644
--- a/gcc/config/spu/spu.c
+++ b/gcc/config/spu/spu.c
@@ -1614,6 +1614,8 @@ get_pic_reg (void)
   rtx pic_reg = pic_offset_table_rtx;
   if (!reload_completed && !reload_in_progress)
     abort ();
+  if (current_function_is_leaf && !df_regs_ever_live_p (LAST_ARG_REGNUM))
+    pic_reg = gen_rtx_REG (SImode, LAST_ARG_REGNUM);
   return pic_reg;
 }