From: wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 11 Dec 2003 19:04:07 +0000 (+0000)
Subject: Fix for problem with unnecessary volatile mems.
X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=commitdiff_plain;h=75e0dc776ece5701357ded35ee2ae7c0cb37a01f

Fix for problem with unnecessary volatile mems.
PR target/13132
* function.c (gen_mem_addressof): When no decl, explicitly clear flag
bits.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@74543 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7264d56b840..e05d2afd035 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2003-12-11  James E Wilson  <wilson@specifixinc.com>
+
+	PR target/13132
+	* function.c (gen_mem_addressof): When no decl, explicitly clear flag
+	bits.
+
 2003-12-12  Nick Clifton  <nickc@redhat.com>
 
 	* config/m32r/m32r.c: Convert to ISO-C
diff --git a/gcc/function.c b/gcc/function.c
index 2f6fb9bd143..7ae19d50efa 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;
 }