PR tree-optimization/45059

	* tree-ssa-reassoc.c (eliminate_redundant_comparison): Strip useless
	type conversions from newop{1,2}.  Assert t is a comparison and
	newop{1,2} after the stripping are gimple vals.

	* gcc.c-torture/compile/pr45059.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@163539 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 29c5aec..28a831a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2010-08-25  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/45059
+       * tree-ssa-reassoc.c (eliminate_redundant_comparison): Strip useless
+       type conversions from newop{1,2}.  Assert t is a comparison and
+       newop{1,2} after the stripping are gimple vals.
+
 2010-08-25  Tejas Belagod  <tejas.belagod@arm.com>
 
        * config/arm/iterators.md (VU, SE, V_widen_l): New.

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7a92568..db3ae97 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-08-25  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/45059
+       * gcc.c-torture/compile/pr45059.c: New test.
+
 2010-08-25  Tejas Belagod  <tejas.belagod@arm.com>
 
        * lib/target-supports.exp (check_effective_target_vect_unpack):

diff --git a/gcc/testsuite/gcc.c-torture/compile/pr45059.c b/gcc/testsuite/gcc.c-torture/compile/pr45059.c
new file mode 100644 (file)
index 0000000..3f13cdb
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr45059.c
@@ -0,0 +1,23 @@
+/* PR tree-optimization/45059 */
+
+typedef unsigned int T;
+extern void foo (signed char *, int);
+
+static signed char a;
+static T b[1] = { -1 };
+static unsigned char c;
+
+static inline short int
+bar (short v)
+{
+  c |= a < b[0];
+  return 0;
+}
+
+int
+main ()
+{
+  signed char *e = &a;
+  foo (e, bar (bar (c)));
+  return 0;
+}

diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c
index fd0a6d8..f2264b6 100644 (file)
--- a/gcc/tree-ssa-reassoc.c
+++ b/gcc/tree-ssa-reassoc.c
@@ -1314,9 +1314,14 @@ eliminate_redundant_comparison (enum tree_code opcode,
          enum tree_code subcode;
          tree newop1;
          tree newop2;
+         gcc_assert (COMPARISON_CLASS_P (t));
          tmpvar = create_tmp_var (TREE_TYPE (t), NULL);
          add_referenced_var (tmpvar);
          extract_ops_from_tree (t, &subcode, &newop1, &newop2);
+         STRIP_USELESS_TYPE_CONVERSION (newop1);
+         STRIP_USELESS_TYPE_CONVERSION (newop2);
+         gcc_checking_assert (is_gimple_val (newop1)
+                              && is_gimple_val (newop2));
          sum = build_and_add_sum (tmpvar, newop1, newop2, subcode);
          curr->op = gimple_get_lhs (sum);
        }