re PR tree-optimization/87917 (ICE in initialize_matrix_A at gcc/tree-data-ref.c:3150)

2018-11-15  Richard Biener  <rguenther@suse.de>

	PR middle-end/87917
	* tree-data-ref.c (analyze_miv_subscript): Guard calls to
	analyze_subscript_affine_affine properly.

	* gcc.dg/tree-ssa/pr87917.c: New testcase.

From-SVN: r266173

gcc/ChangeLog

+2018-11-15  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/87917
+	* tree-data-ref.c (analyze_miv_subscript): Guard calls to
+	analyze_subscript_affine_affine properly.
+
 2018-11-15  Xianmiao Qu  <xianmiao_qu@c-sky.com>
 
 	* config/csky/csky-linux-elf.h (LINUX_DYNAMIC_LINKER): Remove.

gcc/testsuite/ChangeLog

+2018-11-15  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/87917
+	* gcc.dg/tree-ssa/pr87917.c: New testcase.
+
 2018-11-15  Bin Cheng  <bin.cheng@linux.alibaba.com>
 
 	PR tree-optimization/84648

gcc/testsuite/gcc.dg/tree-ssa/pr87917.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-loop-distribute-patterns -ftrapv -fno-tree-fre" } */
+
+void foo(int x[])
+{
+ int i, j;
+
+ for (i = 0; i < 2; i++)
+   for (j = 0; j < 2; j++)
+   {
+     x[i] = x[i*j];
+     x[i] = x[i*j];
+   }
+}

gcc/tree-data-ref.c

@@ -4038,9 +4038,9 @@ analyze_miv_subscript (tree chrec_a,
       dependence_stats.num_miv_independent++;
     }
 
-  else if (evolution_function_is_affine_multivariate_p (chrec_a, loop_nest->num)
+  else if (evolution_function_is_affine_in_loop (chrec_a, loop_nest->num)
 	   && !chrec_contains_symbols (chrec_a)
-	   && evolution_function_is_affine_multivariate_p (chrec_b, loop_nest->num)
+	   && evolution_function_is_affine_in_loop (chrec_b, loop_nest->num)
 	   && !chrec_contains_symbols (chrec_b))
     {
       /* testsuite/.../ssa-chrec-35.c