From: Alan Modra <amodra@bigpond.net.au>
Date: Wed, 1 Dec 2004 06:13:16 +0000 (+0000)
Subject: re PR target/12817 ([SYSV] Altivec code generation error with many registers used)
X-Git-Tag: releases/gcc-3.3.6~213
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f3dd562734e2c97f33c63a6510618eaa49fdc35a;p=thirdparty%2Fgcc.git

re PR target/12817 ([SYSV] Altivec code generation error with many registers used)

	PR target/12817
	* config/rs6000/rs6000.c (rs6000_emit_prologue): Use r0 for vrsave.

From-SVN: r91555
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 87e607bb90eb..c4d3e222c94b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-12-01  Alan Modra  <amodra@bigpond.net.au>
+
+	PR target/12817
+	* config/rs6000/rs6000.c (rs6000_emit_prologue): Use r0 for vrsave.
+
 2004-11-29  Roger Sayle  <roger@eyesopen.com>
 
 	PR rtl-optimization/9771
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index ff30609d30f8..009e1e7d7002 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -10358,8 +10358,10 @@ rs6000_emit_prologue ()
       rtx reg, mem, vrsave;
       int offset;
 
-      /* Get VRSAVE onto a GPR.  */
-      reg = gen_rtx_REG (SImode, 12);
+      /* Get VRSAVE onto a GPR.  Note that ABI_V4 might be using r12
+	 as frame_reg_rtx and r11 as the static chain pointer for
+	 nested functions.  */
+      reg = gen_rtx_REG (SImode, 0);
       vrsave = gen_rtx_REG (SImode, VRSAVE_REGNO);
       if (TARGET_MACHO)
 	emit_insn (gen_get_vrsave_internal (reg));