re PR tree-optimization/57741 (ICE in tree.c:build_int_cst_wide starting in revision 200394)

PR tree-optimization/57741
	* tree-vect-loop.c (vect_is_simple_iv_evolution): Disallow
	non-INTEGRAL_TYPE_P non-SCALAR_FLOAT_TYPE_P SSA_NAME step_exprs,
	or SCALAR_FLOAT_TYPE_P SSA_NAMEs if !flag_associative_math.
	Allow REAL_CST step_exprs if flag_associative_math.
	(get_initial_def_for_induction): Handle SCALAR_FLOAT_TYPE_P step_expr.

	* gcc.dg/vect/pr57741-1.c: New test.
	* gcc.dg/vect/pr57741-2.c: New test.
	* gcc.dg/vect/pr57741-3.c: New test.

From-SVN: r200600

gcc/ChangeLog

@@ -1,3 +1,12 @@
+2013-07-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/57741
+	* tree-vect-loop.c (vect_is_simple_iv_evolution): Disallow
+	non-INTEGRAL_TYPE_P non-SCALAR_FLOAT_TYPE_P SSA_NAME step_exprs,
+	or SCALAR_FLOAT_TYPE_P SSA_NAMEs if !flag_associative_math.
+	Allow REAL_CST step_exprs if flag_associative_math.
+	(get_initial_def_for_induction): Handle SCALAR_FLOAT_TYPE_P step_expr.
+
 2013-07-02  Ian Bolton  <ian.bolton@arm.com>
 
 	* config/aarch64/aarch64-simd.md (absdi2): Support abs for

gcc/testsuite/ChangeLog

@@ -1,3 +1,10 @@
+2013-07-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/57741
+	* gcc.dg/vect/pr57741-1.c: New test.
+	* gcc.dg/vect/pr57741-2.c: New test.
+	* gcc.dg/vect/pr57741-3.c: New test.
+
 2013-07-02  Ian Bolton  <ian.bolton@arm.com>
 
 	* gcc.target/config/aarch64/insv_1.c: Update to show it doesn't work

gcc/testsuite/gcc.dg/vect/pr57741-1.c

@@ -0,0 +1,21 @@
+/* PR tree-optimization/57741 */
+/* { dg-do compile } */
+
+void
+foo (float *p, float *q, float x)
+{
+  int i;
+  float f = 1.0f, g = 2.0f;
+  for (i = 0; i < 1024; i++)
+    {
+      *p++ = f;
+      f += x;
+    }
+  for (i = 0; i < 1024; i++)
+    {
+      *q++ = g;
+      g += 0.5f;
+    }
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/testsuite/gcc.dg/vect/pr57741-2.c

@@ -0,0 +1,44 @@
+/* PR tree-optimization/57741 */
+/* { dg-do run } */
+/* { dg-additional-options "-ffast-math" } */
+
+#include "tree-vect.h"
+
+extern void abort (void);
+
+__attribute__((noinline, noclone)) void
+foo (float *p, float *q, float x)
+{
+  int i;
+  p = (float *) __builtin_assume_aligned (p, 32);
+  q = (float *) __builtin_assume_aligned (q, 32);
+  float f = 1.0f, g = 2.0f;
+  for (i = 0; i < 1024; i++)
+    {
+      *p++ = f;
+      f += x;
+    }
+  for (i = 0; i < 1024; i++)
+    {
+      *q++ = g;
+      g += 0.5f;
+    }
+}
+
+float p[1024] __attribute__((aligned (32))) = { 17.0f };
+float q[1024] __attribute__((aligned (32))) = { 17.0f };
+
+int
+main ()
+{
+  int i;
+  check_vect ();
+  foo (p, q, 1.5f);
+  for (i = 0; i < 1024; i++)
+    if (p[i] != 1.0f + i * 1.5f || q[i] != 2.0f + i * 0.5f)
+      abort ();
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 2 loop" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/testsuite/gcc.dg/vect/pr57741-3.c

@@ -0,0 +1,42 @@
+/* PR tree-optimization/57741 */
+/* { dg-do run } */
+/* { dg-additional-options "-ffast-math" } */
+
+#include "tree-vect.h"
+
+extern void abort (void);
+
+float p[1024] __attribute__((aligned (32))) = { 17.0f };
+float q[1024] __attribute__((aligned (32))) = { 17.0f };
+char r[1024] __attribute__((aligned (32))) = { 1 };
+
+__attribute__((noinline, noclone)) void
+foo (float x)
+{
+  int i;
+  float f = 1.0f, g = 2.0f;
+  for (i = 0; i < 1024; i++)
+    {
+      p[i] = f;
+      f += x;
+      q[i] = g;
+      g += 0.5f;
+      r[i]++;
+    }
+}
+
+int
+main ()
+{
+  int i;
+  check_vect ();
+  r[0] = 0;
+  foo (1.5f);
+  for (i = 0; i < 1024; i++)
+    if (p[i] != 1.0f + i * 1.5f || q[i] != 2.0f + i * 0.5f || r[i] != 1)
+      abort ();
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/tree-vect-loop.c

@@ -538,7 +538,12 @@ vect_is_simple_iv_evolution (unsigned loop_nb, tree access_fn, tree * init,
   if (TREE_CODE (step_expr) != INTEGER_CST
       && (TREE_CODE (step_expr) != SSA_NAME
 	  || ((bb = gimple_bb (SSA_NAME_DEF_STMT (step_expr)))
-	      && flow_bb_inside_loop_p (get_loop (cfun, loop_nb), bb))))
+	      && flow_bb_inside_loop_p (get_loop (cfun, loop_nb), bb))
+	  || (!INTEGRAL_TYPE_P (TREE_TYPE (step_expr))
+	      && (!SCALAR_FLOAT_TYPE_P (TREE_TYPE (step_expr))
+		  || !flag_associative_math)))
+      && (TREE_CODE (step_expr) != REAL_CST
+	  || !flag_associative_math))
     {
       if (dump_enabled_p ())
         dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
@@ -3276,6 +3281,12 @@ get_initial_def_for_induction (gimple iv_phi)
     {
       /* iv_loop is the loop to be vectorized. Generate:
 	  vec_step = [VF*S, VF*S, VF*S, VF*S]  */
+      if (SCALAR_FLOAT_TYPE_P (TREE_TYPE (step_expr)))
+	{
+	  expr = build_int_cst (integer_type_node, vf);
+	  expr = fold_convert (TREE_TYPE (step_expr), expr);
+	}
+      else
 	expr = build_int_cst (TREE_TYPE (step_expr), vf);
       new_name = fold_build2 (MULT_EXPR, TREE_TYPE (step_expr),
 			      expr, step_expr);
@@ -3339,6 +3350,12 @@ get_initial_def_for_induction (gimple iv_phi)
       gcc_assert (!nested_in_vect_loop);
 
       /* Create the vector that holds the step of the induction.  */
+      if (SCALAR_FLOAT_TYPE_P (TREE_TYPE (step_expr)))
+	{
+	  expr = build_int_cst (integer_type_node, nunits);
+	  expr = fold_convert (TREE_TYPE (step_expr), expr);
+	}
+      else
 	expr = build_int_cst (TREE_TYPE (step_expr), nunits);
       new_name = fold_build2 (MULT_EXPR, TREE_TYPE (step_expr),
 			      expr, step_expr);