From: Bernd Schmidt <bernds@redhat.com>
Date: Thu, 1 Mar 2001 14:04:23 +0000 (+0000)
Subject: Fix register renaming problem
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8cb714352c0a6d8ad639a4f72837434295d03bfa;p=gcc.git

Fix register renaming problem

From-SVN: r40152
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 879827b9f16..0ca9c9b1a43 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2001-03-01  Bernd Schmidt  <bernds@redhat.com>
 
+	* config/ia64/ia64.c (ia64_hard_regno_rename_ok): Disallow renaming
+	from reg 4 if current_function_calls_setjmp.
+
 	* reload1.c (eliminate_regs_in_insn): Restrict the special case
 	code not to try to optimize adds with anything but a REG destination.
 
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index 1a4baa02c6c..bfe0d551dad 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -2436,6 +2436,10 @@ ia64_hard_regno_rename_ok (from, to)
   if (PR_REGNO_P (from) && PR_REGNO_P (to))
     return (from & 1) == (to & 1);
 
+  /* Reg 4 contains the saved gp; we can't reliably rename this.  */
+  if (from == GR_REG (4) && current_function_calls_setjmp)
+    return 0;
+
   return 1;
 }