From: Kaz Kojima <kkojima@gcc.gnu.org>
Date: Sat, 10 Mar 2007 05:04:10 +0000 (+0000)
Subject: mode-switching.c (create_pre_exit): Skip blockage insn.
X-Git-Tag: releases/gcc-4.3.0~6324
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=07288ab03780bf84d7c0771b6bd76a78160d75d5;p=thirdparty%2Fgcc.git

mode-switching.c (create_pre_exit): Skip blockage insn.

	* mode-switching.c (create_pre_exit): Skip blockage insn.

From-SVN: r122791
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index cbe3d08abee3..ee77d386d48d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2007-03-10  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	* mode-switching.c (create_pre_exit): Skip blockage insn.
+
 2007-03-09  Diego Novillo  <dnovillo@redhat.com>
 
 	* tree-pass.h (TODO_update_smt_usage): Remove.
diff --git a/gcc/mode-switching.c b/gcc/mode-switching.c
index 407ae76a8c6b..8e9bde302a3f 100644
--- a/gcc/mode-switching.c
+++ b/gcc/mode-switching.c
@@ -259,6 +259,12 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
 			last_insn = return_copy;
 			continue;
 		      }
+		    if (GET_CODE (PATTERN (return_copy)) == ASM_INPUT
+			&& strcmp (XSTR (PATTERN (return_copy), 0), "") == 0)
+		      {
+			last_insn = return_copy;
+			continue;
+		      }
 		    /* If the return register is not (in its entirety)
 		       likely spilled, the return copy might be
 		       partially or completely optimized away.  */