From: James E Wilson <wilson@specifixinc.com>
Date: Fri, 17 Sep 2004 17:56:32 +0000 (+0000)
Subject: Fix linux kernel miscompile.
X-Git-Tag: releases/gcc-3.3.5~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72c100bc8725a92248f9312b2a44a0b8628684b2;p=thirdparty%2Fgcc.git

Fix linux kernel miscompile.

PR target/17455
* config/ia64/ia64.c (ia64_function_ok_for_sibcall): Return false
if current_function_decl is a sibcall.

From-SVN: r87659
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 05cb309f57cf..0d6e9d12f422 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2004-09-17  James E Wilson  <wilson@specifixinc.com>
+
+	PR target/17455
+	* config/ia64/ia64.c (ia64_function_ok_for_sibcall): Return false
+	if current_function_decl is a sibcall.
+
 2004-09-13  Richard Henderson  <rth@redhat.com>
 
         PR inline-asm/6806
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index b90ca308e10e..67fb535fbf0f 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -7394,6 +7394,12 @@ bool
 ia64_function_ok_for_sibcall (decl)
      tree decl;
 {
+  /* We can't perform a sibcall if the current function has the syscall_linkage
+     attribute.  */
+  if (lookup_attribute ("syscall_linkage",
+			TYPE_ATTRIBUTES (TREE_TYPE (current_function_decl))))
+    return false;
+
   /* We must always return with our current GP.  This means we can
      only sibcall to functions defined in the current module.  */
   return decl && (*targetm.binds_local_p) (decl);