PR tree-optimization/55832

	* fold-const.c (fold_binary_loc): For ABS_EXPR<x> >= 0 and
	ABS_EXPR<x> < 0 folding use constant_boolean_node instead of
	integer_{one,zero}_node.

	* gcc.c-torture/compile/pr55832.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@194836 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 43 insertions, 3 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0c89cc4ec1b..346b366f04d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,12 @@
 2013-01-03  Jakub Jelinek  <jakub@redhat.com>
+	    Marc Glisse  <marc.glisse@inria.fr>
+
+	PR tree-optimization/55832
+	* fold-const.c (fold_binary_loc): For ABS_EXPR<x> >= 0 and
+	ABS_EXPR<x> < 0 folding use constant_boolean_node instead of
+	integer_{one,zero}_node.
+
+2013-01-03  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/54402
 	* params.def (PARAM_MAX_VARTRACK_REVERSE_OP_SIZE): New param.
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 0a8b90a5d09..4f384a75344 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -1,7 +1,7 @@
 /* Fold a constant sub-tree into a single node for C-compiler
    Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
-   2012 Free Software Foundation, Inc.
+   2012, 2013 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -13519,7 +13519,9 @@ fold_binary_loc (location_t loc,
 				    "when simplifying comparison of "
 				    "absolute value and zero"),
 				   WARN_STRICT_OVERFLOW_CONDITIONAL);
-	  return omit_one_operand_loc (loc, type, integer_one_node, arg0);
+	  return omit_one_operand_loc (loc, type,
+				       constant_boolean_node (true, type),
+				       arg0);
 	}
 
       /* Convert ABS_EXPR<x> < 0 to false.  */
@@ -13533,7 +13535,9 @@ fold_binary_loc (location_t loc,
 				    "when simplifying comparison of "
 				    "absolute value and zero"),
 				   WARN_STRICT_OVERFLOW_CONDITIONAL);
-	  return omit_one_operand_loc (loc, type, integer_zero_node, arg0);
+	  return omit_one_operand_loc (loc, type,
+				       constant_boolean_node (false, type),
+				       arg0);
 	}
 
       /* If X is unsigned, convert X < (1 << Y) into X >> Y == 0
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b3418f11882..12f1688c447 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2013-01-03  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/55832
+	* gcc.c-torture/compile/pr55832.c: New test.
+
 2013-01-02  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	* gcc.dg/pr55430.c: Define MAP_FAILED if not defined.
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr55832.c b/gcc/testsuite/gcc.c-torture/compile/pr55832.c
new file mode 100644
index 00000000000..221c3c988e6
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr55832.c
@@ -0,0 +1,23 @@
+/* PR tree-optimization/55832 */
+
+int g, b;
+
+void
+foo (void)
+{
+  union U { int i; unsigned short s; } a = { 0 };
+  unsigned char c;
+  unsigned short d = 0, *p = &a.s;
+
+  if (g)
+    a.i--;
+
+  if (b && a.i < (d = 1))
+    return;
+
+  for (; a.i < 15; a.i++)
+    b |= d <= c;
+
+  if (!*p)
+    g = 0;
+}