re PR bootstrap/53021 (bootstrap failure on Linux/ia32)

	PR bootstrap/53021
	* alias.h (UNIQUE_BASE_VALUE_SP, UNIQUE_BASE_VALUE_ARGP,
	UNIQUE_BASE_VALUE_FP, UNIQUE_BASE_VALUE_HFP): Define.
	* alias.c (init_alias_targets): Use UNIQUE_BASE_VALUE_*
	macros instead of constants.
	* dse.c (record_store): Check for SP ADDRESS by comparing
	XWINT to UNIQUE_BASE_VALUE_SP instead of expecting
	XEXP to be stack_pointer_rtx.

From-SVN: r186623

gcc/ChangeLog

+2012-04-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/53021
+	* alias.h (UNIQUE_BASE_VALUE_SP, UNIQUE_BASE_VALUE_ARGP,
+	UNIQUE_BASE_VALUE_FP, UNIQUE_BASE_VALUE_HFP): Define.
+	* alias.c (init_alias_targets): Use UNIQUE_BASE_VALUE_*
+	macros instead of constants.
+	* dse.c (record_store): Check for SP ADDRESS by comparing
+	XWINT to UNIQUE_BASE_VALUE_SP instead of expecting
+	XEXP to be stack_pointer_rtx.
+
 2012-04-20  Richard Guenther  <rguenther@suse.de>
 
 	* tree-ssa-copy.c (propagate_tree_value_into_stmt): Use

gcc/alias.c

 /* Alias analysis for GNU C
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
-   2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+   2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
    Contributed by John Carr (jfc@mit.edu).
 
 This file is part of GCC.
@@ -2734,11 +2734,15 @@ init_alias_target (void)
 	&& HARD_REGNO_MODE_OK (i, Pmode))
       static_reg_base_value[i] = arg_base_value;
 
-  static_reg_base_value[STACK_POINTER_REGNUM] = unique_base_value (-1);
-  static_reg_base_value[ARG_POINTER_REGNUM] = unique_base_value (-2);
-  static_reg_base_value[FRAME_POINTER_REGNUM] = unique_base_value (-3);
+  static_reg_base_value[STACK_POINTER_REGNUM]
+    = unique_base_value (UNIQUE_BASE_VALUE_SP);
+  static_reg_base_value[ARG_POINTER_REGNUM]
+    = unique_base_value (UNIQUE_BASE_VALUE_ARGP);
+  static_reg_base_value[FRAME_POINTER_REGNUM]
+    = unique_base_value (UNIQUE_BASE_VALUE_FP);
 #if !HARD_FRAME_POINTER_IS_FRAME_POINTER
-  static_reg_base_value[HARD_FRAME_POINTER_REGNUM] = unique_base_value (-4);
+  static_reg_base_value[HARD_FRAME_POINTER_REGNUM]
+    = unique_base_value (UNIQUE_BASE_VALUE_HFP);
 #endif
 }
 

gcc/alias.h

 /* Exported functions from alias.c
-   Copyright (C) 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2007, 2008, 2009, 2010, 2012
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -50,4 +51,11 @@ extern int nonoverlapping_memrefs_p (const_rtx, const_rtx, bool);
    memory barriers, including an address of SCRATCH.  */
 #define ALIAS_SET_MEMORY_BARRIER	((alias_set_type) -1)
 
+/* Values of XWINT (address, 0) of Pmode ADDRESS rtxes for special
+   registers.  */
+#define UNIQUE_BASE_VALUE_SP	-1
+#define UNIQUE_BASE_VALUE_ARGP	-2
+#define UNIQUE_BASE_VALUE_FP	-3
+#define UNIQUE_BASE_VALUE_HFP	-4
+
 #endif /* GCC_ALIAS_H */

gcc/dse.c

 /* RTL dead store elimination.
-   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
    Free Software Foundation, Inc.
 
    Contributed by Richard Sandiford <rsandifor@codesourcery.com>
@@ -1503,7 +1503,7 @@ record_store (rtx body, bb_info_t bb_info)
       if (!base_term
 	  || (GET_CODE (base_term) == ADDRESS
 	      && GET_MODE (base_term) == Pmode
-	      && XEXP (base_term, 0) == stack_pointer_rtx))
+	      && XWINT (base_term, 0) == UNIQUE_BASE_VALUE_SP))
 	insn_info->stack_pointer_based = true;
       insn_info->contains_cselib_groups = true;