From: DJ Delorie <dj@redhat.com>
Date: Thu, 28 Jul 2011 22:26:23 +0000 (-0400)
Subject: expr.c (expand_expr_addr_expr_1): Detect a user request for a local frame in a naked... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=69135c94b33fe4e0eebe40072f327a4e769848e7;p=gcc.git

expr.c (expand_expr_addr_expr_1): Detect a user request for a local frame in a naked function...

* expr.c (expand_expr_addr_expr_1): Detect a user request for a
local frame in a naked function, and produce a suitable error for
that specific case.

From-SVN: r176904
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 371128808b3..015724c506d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2011-07-28  DJ Delorie  <dj@redhat.com>
 
+	* expr.c (expand_expr_addr_expr_1): Detect a user request for a
+	local frame in a naked function, and produce a suitable error for
+	that specific case.
+
 	* config/m32c/m32c.c (m32c_secondary_reload_class): Allow PSI
 	registers to be reloaded in HI classes when the target is HI.
 
diff --git a/gcc/expr.c b/gcc/expr.c
index 59a20b79edf..0d88a21fded 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -7088,7 +7088,16 @@ expand_expr_addr_expr_1 (tree exp, rtx target, enum machine_mode tmode,
 	  /* If the DECL isn't in memory, then the DECL wasn't properly
 	     marked TREE_ADDRESSABLE, which will be either a front-end
 	     or a tree optimizer bug.  */
-	  gcc_assert (MEM_P (result));
+
+	  if (TREE_ADDRESSABLE (exp)
+	      && ! MEM_P (result)
+	      && ! targetm.calls.allocate_stack_slots_for_args())
+	    {
+	      error ("local frame unavailable (naked function?)");
+	      return result;
+	    }
+	  else
+	    gcc_assert (MEM_P (result));
 	  result = XEXP (result, 0);
 
 	  /* ??? Is this needed anymore?  */