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From a3ac868928384ffe6f10c3aa0fd3ac9ab8cc1aae Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 26 Apr 2011 13:44:51 +0000
Subject: [PATCH 182/200] PR tree-optimization/48734
* tree-ssa-reassoc.c (eliminate_redundant_comparison): Give up
if return value from maybe_fold_*_comparsions isn't something
the code is prepared to handle.
* gcc.c-torture/compile/pr48734.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@172969 138bc75d-0d04-0410-961f-82ee72b054a4
index 581f168..566f02e 100644
new file mode 100644
index 0000000..b20ea80
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr48734.c
@@ -0,0 +1,11 @@
+/* PR tree-optimization/48734 */
+
+unsigned int
+foo (int x, unsigned int y, unsigned int z)
+{
+ z &= (x == -__INT_MAX__ - 1 ? x : -x) > y;
+ z &= (x == -__INT_MAX__ - 1 ? x : -x) > y;
+ z &= (x == -__INT_MAX__ - 1 ? x : -x) > y;
+ z &= (x == -__INT_MAX__ - 1 ? x : -x) > y;
+ return z;
+}
diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c
index 904fef8..987ec65 100644
--- a/gcc/tree-ssa-reassoc.c
+++ b/gcc/tree-ssa-reassoc.c
@@ -1,5 +1,6 @@
/* Reassociation for trees.
- Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Daniel Berlin <dan@dberlin.org>
This file is part of GCC.
@@ -1279,6 +1280,20 @@ eliminate_redundant_comparison (enum tree_code opcode,
if (!useless_type_conversion_p (TREE_TYPE (curr->op), TREE_TYPE (t)))
t = fold_convert (TREE_TYPE (curr->op), t);
+ if (TREE_CODE (t) != INTEGER_CST
+ && !operand_equal_p (t, curr->op, 0))
+ {
+ enum tree_code subcode;
+ tree newop1, newop2;
+ if (!COMPARISON_CLASS_P (t))
+ continue;
+ extract_ops_from_tree (t, &subcode, &newop1, &newop2);
+ STRIP_USELESS_TYPE_CONVERSION (newop1);
+ STRIP_USELESS_TYPE_CONVERSION (newop2);
+ if (!is_gimple_val (newop1) || !is_gimple_val (newop2))
+ continue;
+ }
+
if (dump_file && (dump_flags & TDF_DETAILS))
{
fprintf (dump_file, "Equivalence: ");
--
1.7.0.4
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