From: Uros Bizjak <uros@gcc.gnu.org>
Date: Thu, 6 Nov 2008 12:01:23 +0000 (+0100)
Subject: reg-stack.c (reg_to_stack): Generate +QNaN using real_nan.
X-Git-Tag: releases/gcc-4.4.0~1785
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=11f48903b00851c8edc5cf24a3497b8cf9957173;p=thirdparty%2Fgcc.git

reg-stack.c (reg_to_stack): Generate +QNaN using real_nan.

	* reg-stack.c (reg_to_stack): Generate +QNaN using real_nan.

From-SVN: r141640
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ac8bc74d035a..e0f76e8456a3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2008-11-06  Uros Bizjak  <ubizjak@gmail.com>
+
+	* reg-stack.c (reg_to_stack): Generate +QNaN using real_nan.
+
 2008-11-06  Ben Elliston  <bje@au.ibm.com>
 
 	* gcc.c: Remove ancient comment about a bug in Sun cc.
@@ -35,7 +39,8 @@
 	qualified pointer conversion before stripping qualifiers.
 	* gimplify.c (create_tmp_from_val): Use correctly qualified type.
 	* tree-flow.h (may_propagate_address_into_dereference): Declare.
-	* tree-ssa-ccp.c (may_propagate_address_into_dereference): New function.
+	* tree-ssa-ccp.c (may_propagate_address_into_dereference): New
+	function.
 	(ccp_fold): Use it.
 	* tree-ssa-forwprop.c (rhs_to_tree): Remove useless conversions,
 	properly canonicalize binary ops.
@@ -718,8 +723,7 @@
 2008-10-19  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR c/30260
-	* c-decl.c (finish_enum): Convert non-integer enumerators to enum
-	type.
+	* c-decl.c (finish_enum): Convert non-integer enumerators to enum type.
 	(build_enumerator): Convert enumerators that fit in integer to
 	integer type.
 
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index 0cde0cbc26ed..7511d18139ee 100644
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -3180,14 +3180,17 @@ reg_to_stack (void)
      ??? We can't load from constant memory in PIC mode, because
      we're inserting these instructions before the prologue and
      the PIC register hasn't been set up.  In that case, fall back
-     on zero, which we can get from `ldz'.  */
+     on zero, which we can get from `fldz'.  */
 
   if ((flag_pic && !TARGET_64BIT)
       || ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC)
     not_a_num = CONST0_RTX (SFmode);
   else
     {
-      not_a_num = gen_lowpart (SFmode, GEN_INT (0x7fc00000));
+      REAL_VALUE_TYPE r;
+
+      real_nan (&r, "", 1, SFmode);
+      not_a_num = CONST_DOUBLE_FROM_REAL_VALUE (r, SFmode);
       not_a_num = force_const_mem (SFmode, not_a_num);
     }