From 1ec7a83137275efef6050bb652ac57af2ce05f8e Mon Sep 17 00:00:00 2001
From: James E Wilson <wilson@specifixinc.com>
Date: Thu, 11 Dec 2003 19:04:07 +0000
Subject: Fix for problem with unnecessary volatile mems.

PR target/13132
* function.c (gen_mem_addressof): When no decl, explicitly clear flag
bits.

From-SVN: r74543
---
 gcc/function.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'gcc/function.c')

diff --git a/gcc/function.c b/gcc/function.c
index 2f6fb9b..7ae19d5 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -2868,7 +2868,17 @@ gen_mem_addressof (rtx reg, tree decl, int rescan)
 	fixup_var_refs (reg, GET_MODE (reg), TREE_UNSIGNED (type), reg, 0);
     }
   else if (rescan)
-    fixup_var_refs (reg, GET_MODE (reg), 0, reg, 0);
+    {
+      /* This can only happen during reload.  Clear the same flag bits as
+	 reload.  */
+      MEM_VOLATILE_P (reg) = 0;
+      RTX_UNCHANGING_P (reg) = 0;
+      MEM_IN_STRUCT_P (reg) = 0;
+      MEM_SCALAR_P (reg) = 0;
+      MEM_ATTRS (reg) = 0;
+
+      fixup_var_refs (reg, GET_MODE (reg), 0, reg, 0);
+    }
 
   return reg;
 }
-- 
cgit v1.1