From b33ebc016378d7eddeec789f5019b123c16b8596 Mon Sep 17 00:00:00 2001
From: Geoffrey Keating <geoffk@apple.com>
Date: Thu, 25 Jan 2007 07:13:44 +0000
Subject: [PATCH] * unwind-dw2.c (execute_stack_op): Handle DW_OP_swap.

From-SVN: r121166
---
 gcc/ChangeLog    |  4 ++++
 gcc/unwind-dw2.c | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 532d7ec8fa55..a073cc884f6e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2007-01-24  Geoffrey Keating  <geoffk@apple.com>
+
+	* unwind-dw2.c (execute_stack_op): Handle DW_OP_swap.
+
 2007-01-24  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/27416
diff --git a/gcc/unwind-dw2.c b/gcc/unwind-dw2.c
index 30d1652c1166..62c9d0913158 100644
--- a/gcc/unwind-dw2.c
+++ b/gcc/unwind-dw2.c
@@ -628,6 +628,16 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	  result = stack[stack_elt - 2];
 	  break;
 
+	case DW_OP_swap:
+	  {
+	    _Unwind_Word t;
+	    gcc_assert (stack_elt >= 2);
+	    t = stack[stack_elt - 1];
+	    stack[stack_elt - 1] = stack[stack_elt - 2];
+	    stack[stack_elt - 2] = t;
+	    goto no_push;
+	  }
+
 	case DW_OP_rot:
 	  {
 	    _Unwind_Word t1, t2, t3;