PR tree-optimization/59358

	* tree-vrp.c (union_ranges): To check for the partially
	overlapping ranges or adjacent ranges, also compare *vr0max
	with vr1max.

	* gcc.c-torture/execute/pr59358.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205607 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1d65e4a..ef19166 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,11 @@
-2013-12-02 Sterling Augustine  <saugustine@google.com>
+2013-12-02  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/59358
+       * tree-vrp.c (union_ranges): To check for the partially
+       overlapping ranges or adjacent ranges, also compare *vr0max
+       with vr1max.
+
+2013-12-02  Sterling Augustine  <saugustine@google.com>
 
        * dwarf2out.c (output_pubnames): Use comp_unit_die ()->die_offset
        when there isn't a skeleton die.

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b9c2b6e..c79226b 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2013-12-02  Jakub Jelinek  <jakub@redhat.com>
 
+       PR tree-optimization/59358
+       * gcc.c-torture/execute/pr59358.c: New test.
+
        PR lto/59326
        * gcc.target/i386/i386.exp (check_effective_target_avx2): Move to...
        * lib/target-supports.exp (check_effective_target_avx2): ... here.

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr59358.c b/gcc/testsuite/gcc.c-torture/execute/pr59358.c
new file mode 100644 (file)
index 0000000..674026d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr59358.c
@@ -0,0 +1,44 @@
+/* PR tree-optimization/59358 */
+
+__attribute__((noinline, noclone)) int
+foo (int *x, int y)
+{
+  int z = *x;
+  if (y > z && y <= 16)
+    while (y > z)
+      z *= 2;
+  return z;
+}
+
+int
+main ()
+{
+  int i;
+  for (i = 1; i < 17; i++)
+    {
+      int j = foo (&i, 16);
+      int k;
+      if (i >= 8 && i <= 15)
+       k = 16 + (i - 8) * 2;
+      else if (i >= 4 && i <= 7)
+       k = 16 + (i - 4) * 4;
+      else if (i == 3)
+       k = 24;
+      else
+       k = 16;
+      if (j != k)
+       __builtin_abort ();
+      j = foo (&i, 7);
+      if (i >= 7)
+       k = i;
+      else if (i >= 4)
+       k = 8 + (i - 4) * 2;
+      else if (i == 3)
+       k = 12;
+      else
+       k = 8;
+      if (j != k)
+       __builtin_abort ();
+    }
+  return 0;
+}

diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c
index ce2de47..89f2ffd 100644 (file)
--- a/gcc/tree-vrp.c
+++ b/gcc/tree-vrp.c
@@ -7758,7 +7758,8 @@ union_ranges (enum value_range_type *vr0type,
     }
   else if ((operand_less_p (vr1min, *vr0max) == 1
            || operand_equal_p (vr1min, *vr0max, 0))
-          && operand_less_p (*vr0min, vr1min) == 1)
+          && operand_less_p (*vr0min, vr1min) == 1
+          && operand_less_p (*vr0max, vr1max) == 1)
     {
       /* [  (  ]  ) or [   ](   ) */
       if (*vr0type == VR_RANGE
@@ -7792,7 +7793,8 @@ union_ranges (enum value_range_type *vr0type,
     }
   else if ((operand_less_p (*vr0min, vr1max) == 1
            || operand_equal_p (*vr0min, vr1max, 0))
-          && operand_less_p (vr1min, *vr0min) == 1)
+          && operand_less_p (vr1min, *vr0min) == 1
+          && operand_less_p (vr1max, *vr0max) == 1)
     {
       /* (  [  )  ] or (   )[   ] */
       if (*vr0type == VR_RANGE