re PR tree-optimization/80443 (ICE on valid code at -O2 on x86_64-linux-gnu: in set_v...

	PR tree-optimization/80443
	* tree-vrp.c (intersect_ranges): For signed 1-bit precision type,
	instead of adding 1, subtract -1 and similarly instead of subtracting
	1 add -1.

	* gcc.c-torture/compile/pr80443.c: New test.

From-SVN: r246981

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0278e495ef58dac933a912c0041494f6061659e0..ea44ddb553ea3f015ada80eb38d706f25b14fdf2 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2017-04-18  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/80443
+       * tree-vrp.c (intersect_ranges): For signed 1-bit precision type,
+       instead of adding 1, subtract -1 and similarly instead of subtracting
+       1 add -1.
+
 2017-04-18  Richard Sandiford  <richard.sandiford@arm.com>
 
        PR rtl-optimization/80357

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 05c5e23f07e34fcaa965ea3dff816afcaa767531..11410bb7045f8364664fc77a927346fd361a8d9a 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-04-18  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/80443
+       * gcc.c-torture/compile/pr80443.c: New test.
+
 2017-04-18  Richard Sandiford  <richard.sandiford@arm.com>
 
        PR rtl-optimization/80357

diff --git a/gcc/testsuite/gcc.c-torture/compile/pr80443.c b/gcc/testsuite/gcc.c-torture/compile/pr80443.c
new file mode 100644 (file)
index 0000000..8c30cce
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr80443.c
@@ -0,0 +1,20 @@
+/* PR tree-optimization/80443 */
+
+struct S { int a : 1; } b, c;
+signed char d, e, f;
+
+void
+foo ()
+{ 
+  while (f)
+    { 
+      signed char g = b.a;
+      if (g)
+       b.a = ~(1 + (d || c.a));
+      if (b.a < g && b.a)
+       g = 0;
+      if (b.a > c.a)
+       b.a = g;
+      c.a = e;
+    }
+}

diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c
index 28d9c175dcd45497154494c92e83874e2f2a4111..6d802de29a802376efd5e164091bdb1a740edbb8 100644 (file)
--- a/gcc/tree-vrp.c
+++ b/gcc/tree-vrp.c
@@ -8756,20 +8756,32 @@ intersect_ranges (enum value_range_type *vr0type,
          /* Choose the right gap if the left one is empty.  */
          if (mineq)
            {
-             if (TREE_CODE (vr1max) == INTEGER_CST)
-               *vr0min = int_const_binop (PLUS_EXPR, vr1max,
-                                          build_int_cst (TREE_TYPE (vr1max), 1));
-             else
+             if (TREE_CODE (vr1max) != INTEGER_CST)
                *vr0min = vr1max;
+             else if (TYPE_PRECISION (TREE_TYPE (vr1max)) == 1
+                      && !TYPE_UNSIGNED (TREE_TYPE (vr1max)))
+               *vr0min
+                 = int_const_binop (MINUS_EXPR, vr1max,
+                                    build_int_cst (TREE_TYPE (vr1max), -1));
+             else
+               *vr0min
+                 = int_const_binop (PLUS_EXPR, vr1max,
+                                    build_int_cst (TREE_TYPE (vr1max), 1));
            }
          /* Choose the left gap if the right one is empty.  */
          else if (maxeq)
            {
-             if (TREE_CODE (vr1min) == INTEGER_CST)
-               *vr0max = int_const_binop (MINUS_EXPR, vr1min,
-                                          build_int_cst (TREE_TYPE (vr1min), 1));
-             else
+             if (TREE_CODE (vr1min) != INTEGER_CST)
                *vr0max = vr1min;
+             else if (TYPE_PRECISION (TREE_TYPE (vr1min)) == 1
+                      && !TYPE_UNSIGNED (TREE_TYPE (vr1min)))
+               *vr0max
+                 = int_const_binop (PLUS_EXPR, vr1min,
+                                    build_int_cst (TREE_TYPE (vr1min), -1));
+             else
+               *vr0max
+                 = int_const_binop (MINUS_EXPR, vr1min,
+                                    build_int_cst (TREE_TYPE (vr1min), 1));
            }
          /* Choose the anti-range if the range is effectively varying.  */
          else if (vrp_val_is_min (*vr0min)
@@ -8811,22 +8823,34 @@ intersect_ranges (enum value_range_type *vr0type,
          if (mineq)
            {
              *vr0type = VR_RANGE;
-             if (TREE_CODE (*vr0max) == INTEGER_CST)
-               *vr0min = int_const_binop (PLUS_EXPR, *vr0max,
-                                          build_int_cst (TREE_TYPE (*vr0max), 1));
-             else
+             if (TREE_CODE (*vr0max) != INTEGER_CST)
                *vr0min = *vr0max;
+             else if (TYPE_PRECISION (TREE_TYPE (*vr0max)) == 1
+                      && !TYPE_UNSIGNED (TREE_TYPE (*vr0max)))
+               *vr0min
+                 = int_const_binop (MINUS_EXPR, *vr0max,
+                                    build_int_cst (TREE_TYPE (*vr0max), -1));
+             else
+               *vr0min
+                 = int_const_binop (PLUS_EXPR, *vr0max,
+                                    build_int_cst (TREE_TYPE (*vr0max), 1));
              *vr0max = vr1max;
            }
          /* Choose the left gap if the right is empty.  */
          else if (maxeq)
            {
              *vr0type = VR_RANGE;
-             if (TREE_CODE (*vr0min) == INTEGER_CST)
-               *vr0max = int_const_binop (MINUS_EXPR, *vr0min,
-                                          build_int_cst (TREE_TYPE (*vr0min), 1));
-             else
+             if (TREE_CODE (*vr0min) != INTEGER_CST)
                *vr0max = *vr0min;
+             else if (TYPE_PRECISION (TREE_TYPE (*vr0min)) == 1
+                      && !TYPE_UNSIGNED (TREE_TYPE (*vr0min)))
+               *vr0max
+                 = int_const_binop (PLUS_EXPR, *vr0min,
+                                    build_int_cst (TREE_TYPE (*vr0min), -1));
+             else
+               *vr0max
+                 = int_const_binop (MINUS_EXPR, *vr0min,
+                                    build_int_cst (TREE_TYPE (*vr0min), 1));
              *vr0min = vr1min;
            }
          /* Choose the anti-range if the range is effectively varying.  */