gcc/testsuite/gcc.dg/Wrestrict-17.c

   1 /* PR tree-optimization/85826 - ICE in gimple-ssa-warn-restruct on
   2    a variable-length struct
   3    { dg-do compile }
   4    { dg-require-effective-target alloca }
   5    { dg-options "-O2 -Wall" }  */
   6
   7 int f (int n)
   8 {
   9   typedef struct { int a[n]; } S;
  10
  11   S a;
  12   __attribute__ ((noinline)) S g (void) { return a; }
  13
  14   a.a[0] = 1;
  15   a.a[9] = 2;
  16
  17   S b;
  18   b = g ();
  19
  20   return b.a[0] == 1 && b.a[9] == 2;
  21 }