From: H.J. Lu <hongjiu.lu@intel.com>
Date: Tue, 10 May 2005 21:53:06 +0000 (+0000)
Subject: backport: function.c (fixup_var_refs): Save volatile_ok and set to 1.
X-Git-Tag: releases/gcc-3.4.4~20
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c22fcc75e9f4634aa41e9af17173750524ec6415;p=thirdparty%2Fgcc.git

backport: function.c (fixup_var_refs): Save volatile_ok and set to 1.

	Backport from mainline
	2004-02-12  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
	* function.c (fixup_var_refs): Save volatile_ok and set to 1.
	* expr.c (emit_block_move_via_movstr): Save and restore
	volatile_ok.

From-SVN: r99543
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 77de6eb79f60..360fe4cc3322 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2005-05-10  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backport from mainline
+	2004-02-12  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
+	* function.c (fixup_var_refs): Save volatile_ok and set to 1.
+	* expr.c (emit_block_move_via_movstr): Save and restore
+	volatile_ok.
+
 2005-05-10  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/i386/i386.md (sse_mov?fcc* splitters): Add mode to
diff --git a/gcc/expr.c b/gcc/expr.c
index fcb5b0c78d68..1ce2fa4b793c 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -1452,6 +1452,7 @@ static bool
 emit_block_move_via_movstr (rtx x, rtx y, rtx size, unsigned int align)
 {
   rtx opalign = GEN_INT (align / BITS_PER_UNIT);
+  int save_volatile_ok = volatile_ok;
   enum machine_mode mode;
 
   /* Since this is a move insn, we don't care about volatility.  */
@@ -1501,7 +1502,7 @@ emit_block_move_via_movstr (rtx x, rtx y, rtx size, unsigned int align)
 	  if (pat)
 	    {
 	      emit_insn (pat);
-	      volatile_ok = 0;
+	      volatile_ok = save_volatile_ok;
 	      return true;
 	    }
 	  else
@@ -1509,7 +1510,7 @@ emit_block_move_via_movstr (rtx x, rtx y, rtx size, unsigned int align)
 	}
     }
 
-  volatile_ok = 0;
+  volatile_ok = save_volatile_ok;
   return false;
 }
 
diff --git a/gcc/function.c b/gcc/function.c
index 087467cc0cdd..206b11ddddee 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -1517,6 +1517,7 @@ fixup_var_refs (rtx var, enum machine_mode promoted_mode, int unsignedp,
   rtx first_insn = get_insns ();
   struct sequence_stack *stack = seq_stack;
   tree rtl_exps = rtl_expr_chain;
+  int save_volatile_ok = volatile_ok;
 
   /* If there's a hash table, it must record all uses of VAR.  */
   if (ht)
@@ -1528,6 +1529,9 @@ fixup_var_refs (rtx var, enum machine_mode promoted_mode, int unsignedp,
       return;
     }
 
+  /* Volatile is valid in MEMs because all we're doing in changing the
+     address inside.  */
+  volatile_ok = 1;
   fixup_var_refs_insns (first_insn, var, promoted_mode, unsignedp,
 			stack == 0, may_share);
 
@@ -1555,6 +1559,8 @@ fixup_var_refs (rtx var, enum machine_mode promoted_mode, int unsignedp,
 	  end_sequence ();
 	}
     }
+
+  volatile_ok = save_volatile_ok;
 }
 
 /* REPLACEMENTS is a pointer to a list of the struct fixup_replacement and X is