gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-13.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fstrict-aliasing -fno-tree-sra --param max-aliased-vops=0 --param max-fields-for-field-sensitive=0 -fdump-tree-fre-details" } */
   3
   4 /* Should be optimized, propagating &a into (*p)[i] with parameters
   5      --param max-aliased-vops=0 --param max-fields-for-field-sensitive=0
   6    which means max 1 VOP per stmt and no SFTs.  */
   7
   8 /* For this testcase we need TBAA to work.  */
   9
  10 struct Foo
  11 {
  12   void *data;
  13   int size;
  14 };
  15 void foo(double (*q)[4], struct Foo *tmp1)
  16 {
  17   double a[4];
  18   int i;
  19   tmp1->data = &a;
  20   tmp1->size = 4;
  21   for (i=0; i<4; ++i)
  22     {
  23       double (*p)[4] = tmp1->data;
  24       (*p)[i] = (*q)[i];
  25     }
  26 }
  27
  28 /* { dg-final { scan-tree-dump "Inserted .* &a" "fre" } } */
  29 /* { dg-final { scan-tree-dump "Replaced tmp1_.\\\(D\\\)->data" "fre" } } */
  30 /* { dg-final { cleanup-tree-dump "fre" } } */