re PR rtl-optimization/39241 (ICE in subreg_get_info, at rtlanal.c:3104)

gcc/

2008-02-25  H.J. Lu  <hongjiu.lu@intel.com>

	PR rtl-optimization/39241
	* jump.c (rtx_renumbered_equal_p): Remove 2 superfluous calls
	to subreg_offset_representable_p.

gcc/testsuite/

2008-02-25  H.J. Lu  <hongjiu.lu@intel.com>

	PR rtl-optimization/39241
	* gcc.dg/torture/pr39241.c: New.

From-SVN: r144430

gcc/ChangeLog

+2008-02-25  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR rtl-optimization/39241
+	* jump.c (rtx_renumbered_equal_p): Remove 2 superfluous calls
+	to subreg_offset_representable_p.
+
 2009-02-25  Paolo Bonzini  <bonzini@gnu.org>
 
 	* regmove.c (regmove_optimize): Conform to struct rtl_opt_pass
@@ -44,7 +50,7 @@
 	* dwarf2out.c (gen_enumeration_type_die): Handle CONST_DECLs.
 
 2009-02-24  Richard Guenther  <rguenther@suse.de>
-	Zdenek Dvorak  <ook@ucw.cz>
+	    Zdenek Dvorak  <ook@ucw.cz>
 
 	PR tree-optimization/39233
 	* tree-ssa-loop-ivopts.c (add_candidate_1): Do not except pointers

gcc/jump.c

 /* Optimize jump instructions, for GNU compiler.
    Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997
-   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
+   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -1563,11 +1563,6 @@ rtx_renumbered_equal_p (const_rtx x, const_rtx y)
 					   GET_MODE (x));
 	      byte_x = 0;
 	    }
-	  else if (!subreg_offset_representable_p (reg_x,
-						   GET_MODE (SUBREG_REG (x)),
-						   byte_x,
-						   GET_MODE (x)))
-	    return 0;
 	}
       else
 	{
@@ -1594,11 +1589,6 @@ rtx_renumbered_equal_p (const_rtx x, const_rtx y)
 					   GET_MODE (y));
 	      byte_y = 0;
 	    }
-	  else if (!subreg_offset_representable_p (reg_y,
-						   GET_MODE (SUBREG_REG (y)),
-						   byte_y,
-						   GET_MODE (y)))
-	    return 0;
 	}
       else
 	{

gcc/testsuite/ChangeLog

+2008-02-25  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR rtl-optimization/39241
+	* gcc.dg/torture/pr39241.c: New.
+
 2009-02-25  Martin Jambor  <mjambor@suse.cz>
+
 	PR tree-optimizations/39259
 	* g++.dg/torture/pr39259.C: New testcase.
 
@@ -8,7 +14,7 @@
 	* g++.dg/template/instantiate10.C: New testcase.
 
 2009-02-24  Richard Guenther  <rguenther@suse.de>
-	Zdenek Dvorak  <ook@ucw.cz>
+	    Zdenek Dvorak  <ook@ucw.cz>
 
 	PR tree-optimization/39233
 	* gcc.c-torture/execute/pr39233.c: New testcase.

gcc/testsuite/gcc.dg/torture/pr39241.c

+/* { dg-do compile } */
+/* { dg-options "-w" } */
+
+static inline int
+foo (float f)
+{
+  return *((int *) &f) - 1;
+}
+
+float
+bar (float x, float y, float *z)
+{
+  float c = y < 0.002f ? 0.002f : y;
+  float d = x < c ? c : x;
+  return z[foo (c)] + z[foo (d * 255.0f)];
+}